http://www.amazon.com/Extech-380260-Autoranging-Digital-Insulation/dp/B000EWW2UA/ref=sr_1_1?ie=UTF8&qid=1354065758&sr=8-1&keywords=extech+insulation
$239
On Tue, Nov 27, 2012 at 7:32 PM, Robert Nuese wrote:
> Thanks to the Wrenches who have offered good advice.
>
> In answer to several of you
Hi Peter
Are these 12 batteries in a large single steel case?
And are they flooded or VRLA?
Thx
Jay
Peltz power
Sent from my iPhone
On Nov 27, 2012, at 1:31 PM, "Parrish, Peter" wrote:
> We recently purchased a battery powered forklift, with 24 ea. 2V batteries.
> Approximate dimensi
These batteries can take a 2000 or so cycles to 20% dod before they are worn
out.
Both numbers could be the 6 hour rate, it varies with electrolyte strength.
Somewhere between 1.265 and 1.285 SG, some hi acid cells are 1.325 SG.
The 24 means 24 cells, the 85 is the 85 AH plates and the 13 means 13
Peter:
These batteries sound like IBE 85N batteries. See link below. I need to
warn you that this company has about the worse web site in the industry.
http://www.ibe-inc.com/html/altenergy.htm
William
At 01:31 PM 11/27/2012, you wrote:
We recently purchased a battery powered forklift, w
Someone earlier suggested contacting Solmetric in Sebastapol:
http://www.solmetric.com/contact-us.html
Their PVA I-V curve tracer is a great troubleshooting tool, and they also carry
a Megger MIT 430 insulation tester:
http://www.solmetric.com/megger-mit430.html
Maybe they have a kit (PVA + Me
Thanks to the Wrenches who have offered good advice.
In answer to several of you who suggested megger testing,
No, I'm afraid I don't own a megger. It had become clear to me that
this might well be a useful tool in my case, but the things are expensive.
I've managed to install pv systems for 10 ye
Bill Brooks posted this in 2008. A couple of project-specific sentences
were removed to avoid confusion.
"The 6kVA value comes from the California Rule 21 that I worked on. It only
applies to split-phase 240V systems (6kVA on 120V). There is no specific
limit for imbalance on a 3-phase service.
We recently purchased a battery powered forklift, with 24 ea. 2V batteries.
Approximate dimensions: W=5", L=6-3/16", H=~21" (hard to tell). Enersys is
stamped on the top.
The battery supplier claims the batteries are "24-85-13" but this refers to a
24V battery as far as I can tell. He also clai
AGM are easy to ship in, in fact they are easier than flooded due to Hazmat
shipping issues.
What island?
On Tue, Nov 27, 2012 at 7:01 PM, Dan Fink wrote:
> We are looking at a load of about 100 watts, 24/7, and the locations would
> be in the Caribbean with 5-6 full sun hours daily, most days.
We are looking at a load of about 100 watts, 24/7, and the locations would
be in the Caribbean with 5-6 full sun hours daily, most days. I don't
foresee a large amount of generator run time, but storms and fog happen.
This is not in the USA, so I also see issues in obtaining AGM batteries.
Golf ca
The problem you will face with such a small generator is the run time
rating. You are likely to put a large number of hours on this and you will
kill a little 2KW gas generator quickly. The service interval will be too
short for this type of use.
Additionally, they are generally not designed to be
I really don't understand what your problem with this arrangement is.
How would this be different from a house on phase A-B installing an
inverter and the next house on Phase B-C installing an inverter? Or,
installing two single phase 240V A/C units in a three phase building?
Electricians have no i
I would agree that the imbalance at these power levels is not a major
issue. If it appears that Phase A is most heavily-loaded, I'd install
the inverters as A-B and A-C to help mitigate the existing imbalance. If
you've got a lot of 1P loads on a 3P service-- lighting, office
receptacles or wha
Hi holt,
Just FYI, Fronius will pay you $250 each to swap the inverters.
Larry Crutcher
Starlight Solar Power Systems
On Nov 27, 2012, at 12:59 PM,
wrote:
We were asked to inspect a GT system installed by others. Service is 208 3ph
with two (?) Fronius IG 4500 208v inverters. The inver
Hello esteemed Wrenches;
Has anyone here ever come across a very small, quiet gasoline or propane
generator (no more than 2kw) that can be auto-started? Or electronics that
could do that for a stock generator? A Honda 1000i or 2000i would be ample,
but is not auto start. This is for 12VDC perimete
Hi Holt,
We installed a commercial system a year ago for the National Park
Service that was designed by a competitor (?) and signed off on by an
engineer. It consisted of 13.2 kw of pv and two Fronius 7000 watt, 208
3 ph. inverters. It sounds a lot like what you are dealing with. I
questioned th
William,
I should have mentioned that we have two strings of 11 M-215 on the
system I was referring to. The error message we are getting is AC Freq.
Out of Range. Sorry for any confusion.
Daryl
> William
>
> Double check your voltage drop on the AC branch circuits, and make sure
> that you co
Bill:
Good question. I called Enphase back and they say it is definitely a
hardware problem. There are at least two registers that indicate AC line
voltage and in this case they disagree, with VRMS indicating zero. Enphase
has advanced diagnostics they can call up on-line, apparently.
Wil
We were asked to inspect a GT system installed by others. Service is 208 3ph
with two (?) Fronius IG 4500 208v inverters. The inverter panel is 3ph with two
2pole breakers - one each side of the buss bar in a A/B, B/C configuration
(??). Called Fronius and they said it would work, but they "don
William
Double check your voltage drop on the AC branch circuits, and make sure
that you consider your wiring between inverters. Remember that voltage
drop is additive and each inverter will see a slightly lower voltage drop
which could account for the voltage over error, especially if you are
se
Let us know what the megohmmeter says. FWIW: There is some precedent for
premature product failure in a roof-integrated product manufactured by Energy
Conversion Devices (Uni-Solar):
http://www.utsandiego.com/news/2012/sep/14/tp-flawed-solar-panels-removed-at-schools/?print&page=all
On Nov 27,
JASON:
The reference temperature for the Square-D breakers is 40C/104F, as
opposed to 20C/68F for the ABB breakers. The possibility of a "nuisance
trip" due to derating would occur sooner for a 20A ABB breaker than for
a 20A QO/QOB breaker.
I received a follow-up e-mail earlier today from St
Robert,
Having installed hundreds of Uni-Solar modules, the only failure I every
experienced was a framed US64 that had the PV negative short to frame. Flexing
the module would create intermittent failure. You have PV laminates so your
ground fault may be to the metal roof. I might be stating
Hi Robert,
Get a mega Ohm meter, isolate the home runs and perform a test. You should
get >550 MOhms. If not, there's something likely wrong with that string
that's causing the intermittent ground fault. Or, have someone stand on
the ground with a hose pointing it at the roof and try to find it
We're pretty fortunate that a roof mounted readily accessible disconnect
has not been a sticking point locally. I would argue that the AC disconnect
is still the trunk cable connector, which can be not readily accessible.
The AC breaker carrying the combined circuit output in the main
distribution
Carl, you may also be interested in HOMER-- free 2-week trial available
of the latest version (after that, $99 per 6-month renewal, despite zero
updates since Nov 2010). There's also the free "legacy" version that's a
few years old.
http://homerenergy.com/
On 2012/11/26 22:40, Carl Adams wrot
This has been a common error on M190's for us. Is the string center fed, or
fed from one end of the 17 inverter string? Where are the failed inverters
on the string in relation to the transition cable(s)? Enphase has an App
Note on voltage rise that might be relevant. They recommend center feeding
27 matches
Mail list logo
