Re: [RE-wrenches] SE or SW

2013-05-15 Thread John Berdner
PV Watts does not account for shading / etc. The NREL SAM model does a better job but is complex (as are most of the good models). We use PVSyst which has models for module level electronics. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway

Re: [RE-wrenches] unbalanced string voltages

2013-04-29 Thread John Berdner
. A couple of iterations should get you really close to where the array will be and let you estimate the reduction in energy yield compared to an optimal MPP on each string or module. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard

Re: [RE-wrenches] Fuse sizing in battery circuits

2013-04-10 Thread John Berdner
- (all ungrounded conductors). I am pretty sure the SI is not internally bonded to ground. This is normal in the rest of the world. Mine are running with an ungrounded battery and there isolation between battery and ground. Best Regards, John Berdner General Manager, North America SolarEdge

Re: [RE-wrenches] Combining conductors

2013-04-04 Thread John Berdner
/0 each, etc. There are some related requirements for conductor routing and equipment ground conductors as well. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200

Re: [RE-wrenches] Combining conductors

2013-04-04 Thread John Berdner
the equivalency to a single larger conductor. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 From: re-wrenches-boun...@lists.re

Re: [RE-wrenches] Cable tray

2013-03-31 Thread John Berdner
available today. I believe 600Vdc commercial and utility scale systems will rapidly become uncompetitive and, within a few years, the exception rather than the rule. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538

Re: [RE-wrenches] 1000 Vdc

2013-03-29 Thread John Berdner
the standard sized wires Conduit is not an issue @ 1000V but switchgear, combiners and fuses are a bit harder to find (but not impossible). Not sure of the specifics of the system so it is hard to make detailed recommendations. Best Regards, John Berdner General Manager, North America SolarEdge

Re: [RE-wrenches] Cable tray

2013-03-27 Thread John Berdner
, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org

Re: [RE-wrenches] GSCM-mini with Honda EM5000SX

2013-03-25 Thread John Berdner
current bus bar connections but I rarely see them used on batteries. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 From: re-wrenches

Re: [RE-wrenches] Question re fine stranded cable with Sunny Islandinverters

2013-03-15 Thread John Berdner
from ferrules direct. http://www.ferrulesdirect.com/ Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 From: re-wrenches-boun...@lists.re

Re: [RE-wrenches] DC circuit breakers in parallel

2013-02-27 Thread John Berdner
Larry: The Code requires parallel breakers to be designed for this application (internally ganged). Just using a handle tie does not allow you to use the poles in parallel. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont

Re: [RE-wrenches] Solaredge AC-coupling revisited

2013-02-26 Thread John Berdner
as a backup to conventional charge control. A simple on off relay to an AC hot water or space heater can dissipate a lot of power relatively simply and inexpensively. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA

Re: [RE-wrenches] CIS mods

2013-02-18 Thread John Berdner
Light soaking = exposed to sunlight for some period of time in order to complete light induced degradation (or apparently light induced enhancement). Best Regards, John Berdner General Manager, North America [cid:image001.jpg@01CE0E09.55EDDEB0] SolarEdge Technologies, Inc. 3347 Gateway

Re: [RE-wrenches] Sunny Island DC wire size

2013-02-13 Thread John Berdner
) this will not be an issue. 48 kVA seems like one heck of a surge but, then again, I have not seen the customer's home :) Best Regards, John Berdner General Manager, North America [cid:image001.jpg@01CE09F2.47122470] SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new

Re: [RE-wrenches] Sunny Island DC wire size

2013-02-04 Thread John Berdner
charging not when inverting and I set the current limit so that I do not exceed ampacity of 2/0. In my experience it takes = 14kW generator to drive a pair of SI's to full power while charging Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway

Re: [RE-wrenches] Hawaii Frequency Settings

2013-02-04 Thread John Berdner
, John Berdner General Manager, North America [cid:image001.jpg@01CE0302.850C5940] SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches

Re: [RE-wrenches] Husqvarna 5500 and VFX3524 Compatibility question

2013-01-31 Thread John Berdner
SMA Sunny Island also does this but also discharges battery in parallel with the generator to create a virtual generator that is larger than the actual generator. Just set the max generator current and it does the rest. Best Regards, John Berdner General Manager, North America [cid:image001

Re: [RE-wrenches] Dc Power Supply on Microinverter input

2013-01-29 Thread John Berdner
between the supply and the inverter to get it to track right. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 -Original Message

Re: [RE-wrenches] high insolation value and inverter undersizing

2013-01-28 Thread John Berdner
. @ Marco: does your weather data source have a database of insolation and temperature over the year ? Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M

Re: [RE-wrenches] high insolation value and inverter undersizing

2013-01-28 Thread John Berdner
of replacement it might be better to undersize the module relative to the power electronics or vice versa. This may or may not increase the installed system cost depending on the products you choose. Running everything flat out all the time is probably not the greatest idea. Best Regards, John

Re: [RE-wrenches] lithium batteries

2013-01-25 Thread John Berdner
Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches

Re: [RE-wrenches] 24V Module Query

2013-01-25 Thread John Berdner
required by NEC). Best Regards, John Berdner General Manager, North America [cid:image001.jpg@01CDFAC6.C81684C0] SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 From: re-wrenches-boun

Re: [RE-wrenches] Equipment Rating vs. Terminal/Lug Rating

2013-01-24 Thread John Berdner
to make sure the terminal at the other end also meets NEC requirement at the conditions specified by the manufacturer of that equipment. Best Regards, John Berdner General Manager, North America [cid:image001.jpg@01CDFA3C.9E6DCC30] SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont

Re: [RE-wrenches] 24V Module Query

2013-01-24 Thread John Berdner
free to contact me if you have any questions. Best Regards, John Berdner General Manager, North America [cid:image001.jpg@01CDFA39.F671DEB0] SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 From

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

2013-01-17 Thread John Berdner
) copper to aluminum. Best Regards, John Berdner General Manager, North America [cid:image001.jpg@01CDF488.819E0980] Solaredge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3201 ext 747 M: 530.277.4894 From: re-wrenches-boun...@lists.re

Re: [RE-wrenches] off grid PV connected to generator

2013-01-16 Thread John Berdner
, John Berdner General Manager, North America [cid:image001.jpg@01CDF3D0.4AE4FB00] SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3201 ext 747 M: 530.277.4894 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches

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

2013-01-15 Thread John Berdner
criteria is if array conductors are, or are not, bonded to ground by the inverter (which is not necessarily related to a specific topology). Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new

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

2013-01-15 Thread John Berdner
. No matter... the industry moving to ungrounded systems which eliminate the need in another way. This is but one of many reasons I like ungrounded arrays. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note

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

2013-01-14 Thread John Berdner
in the field does not make it a Listed ac module. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3201 ext 747 M: 530.277.4894 -Original Message- From: re

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

2013-01-14 Thread John Berdner
then the inverter requires a GEC with all the related requirements - no if and's or but's. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3201 ext 747 M: 530.277.4894

Re: [RE-wrenches] Point of Connection 705.12D2 Exception

2012-12-31 Thread John Berdner
in overcoming this objection (assuming the transformer is big enough to support your onsite generation). Best Regards, John Berdner General Manager, North America 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3201 ext 747 M: 530.277.4894

Re: [RE-wrenches] Point of Connection 705.12D2 Exception

2012-12-30 Thread John Berdner
based on the size of the isolation relay and is usually higher than the inverter's continuous power rating. Best Regards, John Berdner General Manager, North America 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3201 ext 747 M: 530.277.4894

Re: [RE-wrenches] Tying a ground mount to sandstone slab

2012-12-23 Thread John Berdner
or similar. Best Regards, John Berdner General Manager, North America [cid:image001.jpg@01CDE0F4.EF92CDB0] 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3201 ext 747 M: 530.277.4894 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches

Re: [RE-wrenches] Magnum MS 4448 AE issues

2012-12-23 Thread John Berdner
. Best Regards, John Berdner General Manager, North America 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3201 ext 747 M: 530.277.4894 -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re

Re: [RE-wrenches] Magnum MS 4448 AE issues

2012-12-23 Thread John Berdner
screen TV (LED) to turn off. We added a soft start circuit and solved the issue. Best Regards, John Berdner General Manager, North America 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3201 ext 747 M: 530.277.4894 -Original Message- From: re

Re: [RE-wrenches] Solaredge AC-coupling

2012-12-19 Thread John Berdner
systems do not have the same energy awareness as those that live off grid and so they use more power. Best Regards, John Berdner General Manager, North America [cid:image001.jpg@01CDDDC4.BBCAA1C0] 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3201