I concur with William's recommendations and would add a couple of things.
Only use stainless steel hardware for all battery connections.
Wire brush connection surfaces prior to mating.
Use corrosion inhibiting grease on all fittings after making them (to
seal out air).
Lastly, It is a good idea to use stainless Belleville washers (cupped
spring washers) in current carrying connections.
Bolt head, washer, Battery terminal, washer, Belleville washer, locknut.
The spring washer maintains clamping force as the connection expands
and contracts (thermally).
They are very common place in high 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-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of
*William Miller
*Sent:* Monday, March 25, 2013 12:41 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] GSCM-mini with Honda EM5000SX
Eric:
The generator-based charging may impose higher currents into the
batteries than either PV charging or inverter consumption, triggering
the problem.
Melted battery terminals are not uncommon. You must have washers
under your bolt heads with lead flanges. Otherwise the bolt heads
sink into the lead, loosening connections. All mating surfaces need
to be newly wired brushed just before assembly. Battery connections
need to be re-torqued annually.
William Miller
At 09:40 AM 3/25/2013, you wrote:
Larry,
Thanks for your reply. For some reason the schematic I received from
the tech at Atkinson did not show any wires being connected to pins 9
& 10 and as I'm a literalist I did not make those connections. After
I received your (and other) feedback I connected gen power to those
pins and the AGS seemed to function fine. Within 2 days the customer
called me back saying his genny was shutting off after 20 mins of
runtime. I told him to disconnect or reprogram one system component
at a time to find the fault source. Before a fault source was
determined, he observed that two batteries in his bank were
experiencing the "battery terminals melting into the battery casing"
(as was texted to me by the customer). I have no idea how a GSCM
interface would cause or allow an overcurrent fault at the batteries
but the timing of the installation seems to indicate that the AGS is
at fault. Ever heard of this before?
Eric Stikes
SunHarvest Solar
We install solar pool pumps quite frequently here in the
Caribbean. We use Sunpumps - excellent company, great support.
Email Joe Lines j...@sunpumps.com <mailto:j...@sunpumps.com> for
design assistance, he is very helpful.
On Wed, Feb 20, 2013 at 1:02 PM, William Korthof
<wkort...@gmail.com <mailto:wkort...@gmail.com>> wrote:
A few questions.
I have a customer who really wants a solar-direct pool pump for
his home. Medium size in-ground pool and I'd like the pump to be
strong enough to lift to the solar pool panels (12 ft lift above
pool level). I'd like to offer him hardware that is at least one
notch above experimental beta-test. I remember the SunCentric
from several years ago, but not sure how durable that turned out,
and I was having trouble a vendor for it now. Any suggestions for
today with some favorable track record? Or suggestions on what to
avoid?
William Korthof
Sustainable Solutions Partners
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