I digress but... the best battery for grid tie with backup is not lead
antimony, but lead calcuum. Surrette makes these too and they use next to no
water and have a much longer warrantied life.
Todd
On Wednesday, November 16, 2011 6:52pm, "Jeff Yago" said:
No doubt these would be g
Luke:
Maximum inverter output will occur rarely. Most of the time the
inverter(s) will be running at lesser output amps. One approach is to size
wiring for a certain percentage of the average operating amps. What is the
average operating amps? One way I have found to calculate this is use
y seem to be on top of the situation. I would use the MPPT wattage of the
array for my source wattage. devide by 480 volts and 1.73 for three phase and
you have the current per leg.to do your voltage drop calcs from. IO have not
always been carefull to keep similar phases apart, but you will
I have seen the lightening damage at tight bends, but in my electrical career
of 60+ years I have not seen any other
problems.
Darryl
From: Ray Walters
To: RE-wrenches
Sent: Wednesday, November 16, 2011 12:11 PM
Subject: Re: [RE-wrenches] 90 degree wire bend
Hi Folks,
In several months we will be installing a 100kW ground mounted PV
system for one of our commercial customers. I'm in the planning stage
and am looking at the wire runs. The site requires a 700' underground
wire run between the 480V service and the single central inverter
located
Hi rebecca, I assume the inverters are all true 3 phase, to check 20
kW/480/1.73 = 24 amps this is what you expect on each leg. You have 10 of
these therefore 240 amps on each leg. Solar is continous so you need x1.25
this is of course 301 amps you need to select a 301 breaker, but I think
NE
Ron,
This reply a little late since I have been off line a few days. I mentioned
in a similar thread last year that I had an off grid home client I designed
and installed in Idaho back in 1998 that had a Kohler 8.5 kw generator, a
Trace 4024 inverter, two separate solar arrays and Outback char
You're correct Larry, my apologies. Been burning the candle at both ends.
Thanks for your input.
On 2011-11-16, at 9:04 AM, Larry Crutcher, Starlight Solar Power Systems wrote:
> Ron, you have misquoted me so yes you are wrong. It is not about getting to
> 32 volts. Go read it again.
>
> On No
Fellow Wrenches,
I would welcome some feedback on this one:
I may be "adopting" an eleven year old, Y2K, grid tie with battery back-up
system. It consists of 12 - Astro-Power 120 modules, installed in 2000, 12 -
Evergreen EC-110 modules installed in 2004, only one MX60, which controls BOTH
sub-a
It seems that if the strands were stretched and therefore thinned, that
that would increase resistance, some. I think more importantly, the
insulation bunchs up and cracks, and is definitely compromised. Also
with strain hardening of copper, I'm sure some strands could break
internally with a
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, CA 9595
Hi wrenches,
I have a
question about sizing the main OCP breaker for a panel combining the output of
several true three-phase output inverters. To be precise - 10 of the Refusol
20kW, which connect to 480V/277 Y with a max output of 24.1 amps, each
inverter has a 3 pole breaker, line a, b, c a
Some electricians have great fun in making 90 degree wire bends to try and
make their enclosure wiring look so purdy.
Given the importance of maintaining wiring radiuses, this can't be a good
idea, can it? Is the issue greater resistance when the wire is bent at a
straight 90 degrees (or more)
Ron, you have misquoted me so yes you are wrong. It is not about getting to 32
volts. Go read it again.
On Nov 16, 2011, at 12:20 AM, Ron Young wrote:
> Hi Daryl. I've got other KS25's in hybrid systems (wind gen & solar) that
> seem to do fine over the last several years. The Ouback 3524 has a
We are only on your back until you to do the advisable thing: Sell them a
battery capacity monitor. It is a hard fact that NO off grid, battery based
power system should be without a battery capacity monitor. They are cheap (only
$150!) and not an option. Apparently, it is also hard learned fact
Does Sharp still make those quasi-triangular mods?
Thanks,
marco
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You will need a fuse for each inverter for the same reason you would need a
fuse for 4 PV strings.
Jim Duncan
North Texas Renewable Energy
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org]On Behalf Of Glenn Burt
Sen
Hi Daryl. I've got other KS25's in hybrid systems (wind gen & solar) that seem
to do fine over the last several years. The Ouback 3524 has an 85 amp charger.
There was no problem getting to 32 v and holding it for eight hours. This has
been done twice now. Larry and others attribute the abilit
Hi Larry, no amp hour meter installed yet as the customer is penny pinching.
We're trying to solve the problem first and I've been out there twice, once to
do general diagnostics and check all connections, try to load test the
batteries, and so on; the second time I 'dropped in' to try a differe
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