[RE-wrenches] GEC for Micro-Inverters and ACPV Modules

2013-01-14 Thread Mark Frye
therefore by extension does not/can not had a GEC in the system. Exeltech (integrated micro-inverter aka. ACPV) does not seem to have a lug on its chasis. Has the industry pretty much moved to not requiring a GEC for these devices and if so, how are the AHJ taking it? Thanks, Mark Frye Berkeley

Re: [RE-wrenches] EMT in attic

2012-11-09 Thread Mark Frye
find materials with listing for the purpose but never got to the bottom if it. I have always had a problem when I saw thin wall AL flex being used with twist-in-insert type fittings. Mark Frye On 11/9/2012 5:44 AM, Dave Click wrote: Nick, what the AHJ is telling you may actually be in

Re: [RE-wrenches] How do we wrenches provide pertinent advice? (was120% rule applying to conductors)

2012-10-01 Thread Mark Frye
Exactly, Another fine example of how the Code works. Anyone out there have the definition of "special permission". Any changes have to go back to the NFPA? Really the buck stops at the quasi-judicial authority of the head of the building department. Inspectors are the bearers of that author

[RE-wrenches] Short Circuit Cell Damage

2012-09-17 Thread Mark Frye
thoughts? Mark Frye Berkeley Solar Electric Systems ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive:

[RE-wrenches] Grounding - Exposed Metal Part

2012-07-25 Thread Mark Frye
ded, but I can't find references in the Code to support this. Mark Frye Berkeley Solar Electric Systems ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/opti

Re: [RE-wrenches] sub-panel supply-side tap

2012-06-05 Thread Mark Frye
look at the size of the feeder breaker and the pv breaker together to insure that the feeder has sufficient ampapacity per 690.49. Mark Frye On 6/5/2012 3:44 PM, Kirk Herander wrote: Hello, Ideally I'd like to make a supply-side tap on a feeder to a sub-panel. And I mean tapping the fee

Re: [RE-wrenches] Grid tied PV to subpanel on detached garage?

2012-04-11 Thread Mark Frye
Not necessarily. NEC 2008, 250.32 (B), Exception allows you to use the neutral conductor for existing structure so long as several requirements are met. Check it out. On 4/11/2012 8:41 AM, Aladdin Solar wrote: I meant the question largely to be a generic one but I can give you an example: Bur

Re: [RE-wrenches] Grid tied PV to subpanel on detached garage?

2012-04-11 Thread Mark Frye
Also, Was a ground conductor run with the feeder? Mark Frye On 4/11/2012 7:09 AM, Aladdin Solar wrote: Wrenches: There's probably an obvious answer but please help me think this through. Here's the situation--comes up all the time: The PV array and grid-tied inverter will be lo

Re: [RE-wrenches] Grid tied PV to subpanel on detached garage?

2012-04-11 Thread Mark Frye
1 - What is the AC output rating of the PV inverter? 2 - What is the size of the feeder conductors? 3 - Does the sub panel at the garage have a main breaker of it's own? 4 - Does your AHJ or utility require anAC disconnect or not? Mark Frye Berkeley Solar Electric Systems On 4/11/2012 7:

[RE-wrenches] WOW Something Gone Very Wrong

2012-03-29 Thread Mark Frye
* Rooftop solar installation sparks fires in Trenton, New Jersey* 28.03.2012: According to local news portal NJ.com, a rooftop solar system has triggered several small fires at a recycling center in Trenton, New Jersey. The article reports that "a major malfunction in the rooftop solar pane

Re: [RE-wrenches] Listed Battery Enclosure?

2012-03-22 Thread Mark Frye
Still, if you put 2 x 4's on the ground between the batteries and the floor, wouldn't the 2x4's have to be UL listed? On 3/22/2012 3:53 PM, Brian Teitelbaum wrote: Jeremy, Sometimes the best "enclosure" is a locked room. Is it possible in this case to wall off the space and provide a locked

Re: [RE-wrenches] Listed Battery Enclosure?

2012-03-22 Thread Mark Frye
Is there a Standard to which a battery enclosure can be tested such that it can be listed and marked as conforming to the requirements of performance that a battery enclosure must conform to in order for that battery enclosure to be used as a battery enclosure? Is the inspector looking at the

[RE-wrenches] Grid-Tied, PV by AC or DC

2012-03-01 Thread Mark Frye
pling now available, do we yet know which is the more advantagous architecture; grid-tied, battery-based inverter w/ PV on the DC side via charge controllers, or grid-tied, battery-based inverter w/ PV AC coupled via grid-tied, utility-based inverter? Your thoughts? Mark Frye Berkeley Solar Ele

[RE-wrenches] How Is The M215 Doing?

2012-01-31 Thread Mark Frye
Folks, How is the Enphase M215 doing? Is it showing marked improvements in reliability over the previous generation units? Is the cable system going in OK? I've worked with the M190 and M380 but not the M215? Thanks, Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City

Re: [RE-wrenches] NABCEP Sales

2012-01-29 Thread Mark Frye
groups have succesfully integrated the financial services into the product offering. 0$ down leases are now the main offering. This is a huge bar that the small shops can't even begin to touch. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401

Re: [RE-wrenches] Paralleling Multiple Inverter

2012-01-22 Thread Mark Frye
Rich, If you have an archive of Wrenches email, also see thread on this subject dating on and about March 29, 2011. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ Fr

Re: [RE-wrenches] Paralleling Multiple Inverter

2012-01-22 Thread Mark Frye
the Code makers? Why did they include the language "capable of supplying multiple branch " if their intent was other than to allow the use of dedicated load centers? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <

Re: [RE-wrenches] Paralleling Multiple Inverter

2012-01-22 Thread Mark Frye
the service, then the dedicated load center can be main lug without main breaker. If the dedicated load center is located on a buidling remote from the the service, then it will need a main breaker rated at 125A. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530

Re: [RE-wrenches] Paralleling Mutlitple Inverter

2012-01-22 Thread Mark Frye
center for things like monitoring equipment, it is reasonable that the above remain unchanged so long as there is permanent marking stating that no additional load circuits can be added (only supported by Code to the extent AHJ's can make determination of acceptability.) Mark Frye Berkeley

Re: [RE-wrenches] 24 vs. 48

2012-01-17 Thread Mark Frye
apacity 2v cells, there is a size range where a 24V system may in fact be the best choice. Thanks and good luck with it out there. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wre

Re: [RE-wrenches] battery buss bars

2012-01-17 Thread Mark Frye
Polaris has the enitre grey fine stranded line of connectors. Not sure if Burndy has connectors that are rated for fine stranded if that is what you are using. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original

Re: [RE-wrenches] 24 vs. 48

2012-01-17 Thread Mark Frye
o maintain...less watering, less SG measuring, lower overall "part" (individual 2V cells) count? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org

Re: [RE-wrenches] 24 vs. 48

2012-01-17 Thread Mark Frye
OK, But let's assume only one string, how important is it to develop a higher bulk charge current? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenche

[RE-wrenches] 24 vs. 48

2012-01-17 Thread Mark Frye
AH rating? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay peltz Sent: Tuesday, January

Re: [RE-wrenches] intermittent battery problem; ...Battery Sulfation

2011-11-17 Thread Mark Frye
Todd, I thought you were totally off-grid. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenche

Re: [RE-wrenches] Sizing 3 phase OCPD - main

2011-11-16 Thread Mark Frye
Rebekah, If you knew only the power and voltage, then you would use the root of 3 to determine the amps. But since you know the amps, you don't need to use the root. The second equation would be the correct one. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City

Re: [RE-wrenches] under performing Enphase inverters

2011-11-03 Thread Mark Frye
eimbursement of $150. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrench

[RE-wrenches] Storing Batteries

2011-11-02 Thread Mark Frye
Can you store the acid dry for ten years? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenche

Re: [RE-wrenches] Cummins DC generator

2011-10-30 Thread Mark Frye
I see. So there is a big difference between using the DC generator. With an AC unit I can run it into the inverter/charger and it will give me three stage charging. With the DC unit, I can really only us it to bulk charge. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City

Re: [RE-wrenches] Cummins DC generator

2011-10-29 Thread Mark Frye
How would you integrate a dc generator like to Polar Power into a "standard" inverter/charge-battery-pv charge controller system? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.b

Re: [RE-wrenches] Adding on to existing PV System

2011-09-29 Thread Mark Frye
d no additional circuits." I think this is a much better interpretation and method that preserves a clean and functional load side connection topology. I think most reasonable inspectors would agree as well. Good Luck. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City,

Re: [RE-wrenches] Adding on to existing PV System

2011-09-29 Thread Mark Frye
breaker in the existing main panel. Move the existing 30A breaker into the new subpanel and install the new 15A breaker into the same. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysol

Re: [RE-wrenches] Sharp modules

2011-09-10 Thread Mark Frye
er of the frame brings it into square and on we go. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wr

Re: [RE-wrenches] Grounding Requirement Question

2011-09-06 Thread Mark Frye
electrode shall be permitted to be used for both systems... Review this article and share it with your inspector in order to determine what is motivating him. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.

Re: [RE-wrenches] 690.31(B) "within the photovoltaic array"

2011-09-06 Thread Mark Frye
tting from Lumeta around this? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenche

Re: [RE-wrenches] AC Coupling

2011-09-02 Thread Mark Frye
be either a diversi9on load or a contactor that disconnects the grid tied inverters all together. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenche

[RE-wrenches] PG&E Interconnection Agreement Equipment Changes

2011-08-20 Thread Mark Frye
Folks, Has anyone talked with PG&E about needing (or not needing) a new Interconnection Agreement when changing out inverter make and model without increasing the size of the PV generator (number of modules) on a system that is already interconnected? Mark Frye Berkeley Solar Electric Sys

Re: [RE-wrenches] Out of Warranty Inverter Replacements

2011-08-19 Thread Mark Frye
, 75%? Would I have avoided most of my inverter failures if I had? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mai

Re: [RE-wrenches] Out of Warranty Inverter Replacements

2011-08-19 Thread Mark Frye
"Good" based on their online configuration tool, and also well in line the the SMA white paper of many years ago suggesting a 120% mod/inv ratio as optimal. And yet, the first unit failed in 4 years and the refurb failed in 2 year. Mark Frye Berkeley Solar Electric Systems 303 Redbud W

[RE-wrenches] Out of Warranty Inverter Replacements

2011-08-19 Thread Mark Frye
customers: - Buy the refurbished units w/ 1 year warranty - Buy new replacement units with 10 or 20 year warrranties - Buy entirely new equipment such as Enphase or SolarEdge What are other folks experiencing as we move well past the 5 year warranty horizon for many of our earlier customers? Mark Frye

Re: [RE-wrenches] Efficient step up, down transformers

2011-07-25 Thread Mark Frye
f not, it is possible that the coil taps are connected in a manner that is not efficient. That being said, 15.6 A @ 120V sound like an awefully large number. Perhaps you have a bad connection at one of your pull boxes. I would be happy to stop by and take a look at the xfrm spec etc. with you.

Re: [RE-wrenches] Enphase Nema 6 enclosure - not

2011-06-17 Thread Mark Frye
ssing the internal face gasket. I really haven't looked into it much further but I wonder if the water you observed entered through an incomplete connector mate, along the conductors, into the inverter enclosure? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 9

Re: [RE-wrenches] Enphase Nema 6 enclosure - not

2011-06-16 Thread Mark Frye
Was that an M190? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On

Re: [RE-wrenches] smart meters/bidirectional

2011-06-13 Thread Mark Frye
dics meters. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay peltz Sent: Monday, Jun

Re: [RE-wrenches] 3,200AH Battery Bank?

2011-06-13 Thread Mark Frye
The question is not well addressed without knowing the nominal dc system voltage. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@li

Re: [RE-wrenches] SolarEdge v Enphase

2011-06-09 Thread Mark Frye
ure is inherent in microinverters as well. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun

Re: [RE-wrenches] Warranty Claim Based On Enphase Monitoring Data

2011-06-09 Thread Mark Frye
Thanks Phil, I have already swapped the module to confim that the problem follows the module, not the inverter. I am currently working within channels with my distributor for warranty replacement having just requested an RMA. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada

[RE-wrenches] Warranty Claim Based On Enphase Monitoring Data

2011-06-09 Thread Mark Frye
total system yield….0.0013%. I am not complaining, just musing over this interesting evolution. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com ___ List sponsored by Home Power magazine

[RE-wrenches] SolarEdge v Enphase

2011-06-09 Thread Mark Frye
, with high voltage (over 250V) DC wiring, and doubling DC connector count. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com ___ List sponsored by Home Power magazine List Address: RE

Re: [RE-wrenches] Tigo to go?

2011-06-09 Thread Mark Frye
How closely have you looked at this? It looks like the Tigo is already about 1/4 the cost of an Enphase. So how close are you to moving from an optimizer / inverter combination to a microinverter? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024

Re: [RE-wrenches] Working on metal roofs.

2011-05-08 Thread Mark Frye
Bob, I think you are talking about Cougar Paws: http://www.cougarpaws.com/ I love them and buy a pair for anyone who works for me. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysol

Re: [RE-wrenches] AC Coupling Xantrex XW Inverters to EnphaseMicroinverters

2011-05-03 Thread Mark Frye
nd upfront. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of

[RE-wrenches] Enphase Inards - Any Guesses?

2011-04-25 Thread Mark Frye
of these three is electrically identical and solidly connected inside the inverter. But, I don't know. The folks at Enphase tech support will not tell me whether or not this is true. Anyone out there have any ideas about this? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada

Re: [RE-wrenches] Oatey and Standoff vs QuickmountPV Labor

2011-04-22 Thread Mark Frye
..except..there wasn't any rubber there anymore...all rotted out. Back in the day I went for a custom rolled cone flashings that I could caulk into the post and slide a rubber counter-flashing over the whole thing. Overkillperhaps. Best of Luck. Mark Frye Berkeley Solar Electric Sy

Re: [RE-wrenches] METAL ROOF ATTACHMENT

2011-04-21 Thread Mark Frye
Generally, in order to develope the full tensil strength of the bolt, it should be engaged by a minimum of 5 threads. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _

[RE-wrenches] Commisioning AGM bats

2011-04-19 Thread Mark Frye
Folks, I have a couple of new SunExtender AGM batteries that I will be using in a UPS application. My understanding is that I should cycle them before floating them out for standby service. Am I getting this right? How many cycles - to what DOD? Mark Frye Berkeley Solar Electric Systems 303

[RE-wrenches] FYI - John Wiles

2011-04-19 Thread Mark Frye
hwest Technology Development Institute, New Mexico State University 575-646-6105 575-646-3841 (FAX) http://www.nmsu.edu/~tdi/Photovoltaics/Codes-Stds/Codes-Stds.html SWTDI/NMSU 3705 Research Drive Box 30001/MSC 3 SOLAR Las Cruces, NM 88003-8001" Mark Frye Berkeley Solar Electric Systems

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

2011-04-18 Thread Mark Frye
Folks, I did send the question to John Wiles and he was gracious enough to reply. Here is his response: "Mark: Better ask the utility involved. Probably depends if they are on a common transformer or not." Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City,

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

2011-04-18 Thread Mark Frye
it. Otherwise it's onward and upward. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun.

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

2011-04-18 Thread Mark Frye
Or another way to illustrate this problem: There is nothing in the Code that would stop me from hauling out the old #6 and bonding my GEC to my next door neighbors GEC, if I wanted to? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <h

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

2011-04-18 Thread Mark Frye
one of the two. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

2011-04-18 Thread Mark Frye
I have not yet visited the site to see, but I would guess that they are feed from the same transformer. If they were, how would that make it OK? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

2011-04-18 Thread Mark Frye
ed systems in this case because each building has it's own service and therefore cannot be considered as a seperately derived system. So where does the Code speak to this. My sense is that it is a big no-no, but can exactly explain why. Anyone else out there agree or disagree? Mark Frye

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

2011-04-18 Thread Mark Frye
g the groundingstem of multiple seperately derived systems, but could we construe a utility service to one dwelling as a seperately derived system relative to another dwelling with it's own service? Where can one find the definition of a "seperately derived system" in the Code?

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

2011-04-18 Thread Mark Frye
along my merry way? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] O

[RE-wrenches] Two Buildings, Two Services, One Roof

2011-04-17 Thread Mark Frye
I have a customer who has two separate buildings, a home and a shop. Each dwelling has it's own service. He wants to put in two pv systems, one for each service, but wants all the PV modules to be on the shop roof. Why is mind going "clunk" when I try to deside if this is allowed

Re: [RE-wrenches] AC Coupling Fronius IG Plus 10.0 inverter

2011-04-13 Thread Mark Frye
I see. Can this function be enabled/diabled? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenche

Re: [RE-wrenches] AC Coupling Fronius IG Plus 10.0 inverter

2011-04-13 Thread Mark Frye
the DC diversion side solution if you have someplace to put the power instead of just the batteries, although that might be generally less commonly available for retrofits into existing on-grid households. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401

Re: [RE-wrenches] AC Coupling Fronius IG Plus 10.0 inverter

2011-04-12 Thread Mark Frye
ltage gets too high. Once the voltage drops the contactor can close and bring the Fronius back on line and then the 5-minute start up delay before it is feeding the line again. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berk

Re: [RE-wrenches] Battery watering

2011-04-03 Thread Mark Frye
caps using the gravity feed. I don't have any idea what is going on with the distribution of the product from Europe. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkel

Re: [RE-wrenches] Generator and Enphase

2011-03-31 Thread Mark Frye
a problem, so better safe than sorry. So now I see, I have to do what I have to do if I want to be even half as good an electrican as my NABCEP certification says I am. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berk

Re: [RE-wrenches] sizing a sub-panel used tocombinemultipleinverter outputs

2011-03-30 Thread Mark Frye
C side of these inverters we need more to concern ourselves with continuous overload conditions and not so much with short-circuit/ground fault conditions? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar

Re: [RE-wrenches] sizing a sub-panel used tocombine multipleinverter outputs

2011-03-30 Thread Mark Frye
fault from the utility side of the equation far far exceed the currents contributed by the power limited inverter side. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ F

Re: [RE-wrenches] sizing a sub-panel used to combine multipleinverter outputs

2011-03-30 Thread Mark Frye
over current condition in any of that equipment. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenche

Re: [RE-wrenches] sizing a sub-panel used tocombinemultipleinverter outputs

2011-03-30 Thread Mark Frye
not exceed the allowance for the feeder or the sub-panel. Still, if you do have loads in the subpanel, you have to up sizes the sub-panel, but not the feeder conductor. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.

Re: [RE-wrenches] sizing a sub-panel used to combine multipleinverter outputs

2011-03-29 Thread Mark Frye
Opps! My bad, I was thinking of a single phase system, not the three phase system shown in the article. For the three phase system Kent is correct in counting 180A of supply per bar. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <h

Re: [RE-wrenches] sizing a sub-panel used to combine multiple inverter outputs

2011-03-29 Thread Mark Frye
I think Kent and I agree. For the case where the subpanel is not dedicated a PV sub-panel he is calculating for 2 - 50A breakers and I calculated for 3 - 50A breakers. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <h

Re: [RE-wrenches] sizing a sub-panel used to combine multiple inverteroutputs

2011-03-29 Thread Mark Frye
ircuit, and above it, premise wiring. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wre

Re: [RE-wrenches] Generator and Enphase

2011-03-27 Thread Mark Frye
Ken, In the situation you show in your drawing, what was the rating of the transfer switch? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenche

Re: [RE-wrenches] Generator and Enphase

2011-03-27 Thread Mark Frye
e 400A ATS will see the same 480A of supply breakers as the conductors and busbar of the 400A load center. Here is where I am taking leap of faith that the AHJ will agree with me that the same 120% allowance given to the conductors and load center will be given to ATS itself. Mark Frye Berkeley Sola

Re: [RE-wrenches] Generator and Enphase

2011-03-26 Thread Mark Frye
t. Ulitmately my customer agreed with me that this was an undesirable constraint on the operation of an otherwise reliable grid-tied system and it was not clear that this would satify the warranty issue. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 9595

Re: [RE-wrenches] Small, non-UL listed direct PV grid-tie inverters and UL 1741

2011-03-26 Thread Mark Frye
Can you send a link to one of these products? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re

Re: [RE-wrenches] Xantrex/Schneider recall

2011-03-08 Thread Mark Frye
) 519-1470 f: (604) 422-2756 Only have one of these puppies in the field, no problems yet. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re

Re: [RE-wrenches] grounding the Enphase inverter

2011-03-05 Thread Mark Frye
ately derived system and would not require it's own system ground. At that point, would the AC side of the inverter still be considered a separately derived system or would the need for system grounding go away? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959

Re: [RE-wrenches] grounding the Enphase inverter

2011-03-04 Thread Mark Frye
e that we don't need the complexity in wiring? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org]

Re: [RE-wrenches] grounding the Enphase inverter

2011-03-04 Thread Mark Frye
nergy disipators DC power supplies Standby generators ?? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On B

[RE-wrenches] Home Brew Frequency Switch

2011-03-01 Thread Mark Frye
nce such that a problem with current capacities would be a problem. It seems like the frequency would be more of a problem for some devices. Anyone have experience with deliberately adjusting generator frequency away from 60 hertz as described above? Mark Frye Berkeley Solar Electric Systems 303 Redbud

Re: [RE-wrenches] Can I handle the voltage drop?

2011-02-17 Thread Mark Frye
wings to address voltage faults if they occur. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenche

[RE-wrenches] Can I handle the voltage drop?

2011-02-14 Thread Mark Frye
their time faulting and resetting during daily peaks. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com ___ List sponsored by Home Power magazine List Address: RE-wrenches@lis

Re: [RE-wrenches] Grid Tied AC Disconnect Question

2011-01-27 Thread Mark Frye
Aaron, Can you give a bit more information? Is this a situation where the meter and the main disconnect are located on the outside of the building, with a feeder running to a load center in the garage? Does the utility at this location require a external lockable disconnect? Mark Frye

[RE-wrenches] Inverter Recall

2011-01-19 Thread Mark Frye
viewed in PHOTON's archive using the following link: http://www.photon-international.com/newsletter/document/37644.pdf Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysola

Re: [RE-wrenches] 2011 NEC and impact in the field

2011-01-13 Thread Mark Frye
Thanks August, NFPA says there are giving away a softcover copy of 2011 to folks who take a years subscription to NECPLUS before February something. Seems like a good value. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com

Re: [RE-wrenches] 2011 NEC and impact in the field

2011-01-13 Thread Mark Frye
Does anyone here have the 2011 Code available on CD in a searchable format? Know where to get it? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org

Re: [RE-wrenches] 690.14 (4) Max Number of Disconnects

2011-01-12 Thread Mark Frye
e switch in the basement. I assume that the fused disconnect is co-located in the basement with the service equipment? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ F

Re: [RE-wrenches] 690.14 (4) Max Number of Disconnects

2011-01-12 Thread Mark Frye
Al, Are the inverters located inside on the 8th floor with the MLP panel or are they located on the roof? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wr

Re: [RE-wrenches] Xslent?

2011-01-10 Thread Mark Frye
doing to counteract the propogation of this mis-information within the marketplace. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches

Re: [RE-wrenches] Low grid voltage fix

2010-12-20 Thread Mark Frye
How do utilites go about adjusting the voltage at any given site? Adjustable taps on the transformers on the poles? Do they have to go back to the nearest sub-station? Re-arrange the distrubution of customers across differenat areas of the grid. I am in the dark here. Mark Frye Berkeley Solar

Re: [RE-wrenches] Another PV fire

2010-12-14 Thread Mark Frye
Thanks William, I did see your update from the 14th, but it did not provide any conclusive details. I am wondering if anyone has gotten any info since then. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.

Re: [RE-wrenches] Another PV fire

2010-12-14 Thread Mark Frye
Has any information become available about this fire? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wr

Re: [RE-wrenches] double insulated PV wire

2010-12-12 Thread Mark Frye
I am pretty sure you can get it from Multi-Contact USA. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com/> www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wr

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