[RE-wrenches] Aquion Testing

[Tom Duffy]

If you’re showing a lower voltage tray in the stack… You can’t overcharge the whole set to get the 6 volt tray to come up but you can separate (electrically) not physically (leave the center bolt alone) and charge the single tray with a 6 volt charger.

We’ve done this with success several times. Make sure the MC4 connector is clean as they seem to get funky with low voltage.

Kind regards

Tom Duffy
Senior Solar Design Engineer
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tom at solar-biz.com<mailto:tom at solar-biz.com>
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From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf Of John Blittersdorf
Sent: Saturday, November 10, 2018 6:48 PM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] Aquion Testing

Lou, I recently discovered that each layer can be checked for voltage.  I had one battery test lower than the rest.  Looking at the battery closer, I found that my meter probe could get the voltage of each layer indivually. Through an opening in the case. The top layer had the reduced voltage output and it was one cell of the 4 cells in each layer.  I have 4 customers with Aquions and we are seeing lower storage because the days are
Shorter now and fewer sunny days here in the Northeast. These batteries really like long slow charges. I have one  customer with 8000 watts of Pv and a 12kw generator and he can’t figure out why his generator has to run so long.  It is the nature of the batteries and our darkest month.  His system is undersized with 12 battery stacks and he is driving to Maine tomorrow to buy 20 more from another unhappy Aquion user who is going back to lead acid.  I am hoping doubling his storage will solve another problem of voltage dropping to 36 volts when his 1.75hp well pump runs when no sun or generator.  Over sizing the battery bank is ok with Aquions as they don’t need to be fully charged.on a regular basis.

John Blittersdorf




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On Sat, Nov 10, 2018 at 5:33 PM Lou Russo <lou at spreesolarsystems.com<mailto:lou at spreesolarsystems.com>> wrote:
Aloha Wrenches,

I have a orphaned system with 6 - Aquion Aspen 48Ss that is running out of energy nightly. This is a off-grid system with a Outback FP1. The logs from the Mate 3 do not show excess usage. Beyond testing the voltages of the individual stacks is there any way to check if a battery is good, bad, or failing?  I don't have much experience with Aquions and have yet to have any of the 40 or so stacks I have installed fail.

Thanks for your insight.

Aloha,

Lou Russo
lou at spreesolarsystems.com<mailto:lou at spreesolarsystems.com>
808 345 6762
Spree Solar Systems LLC
CT-34322

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