[RE-wrenches] for all you Aquion installers

[Tom Duffy]

Thanks Darryl

I’m going to have the installer bring the offending battery here We’ll see how it goes

Kind regards

Tom Duffy
Senior Solar Design Engineer
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From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Darryl Thayer
Sent: Tuesday, January 30, 2018 3:11 PM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] for all you Aquion installers

Since the cells stack in series the low voltage cell must be discharged.  they are under compression, However If they are disconnected and charged separately perhaps they can be brought back.  Are these batteries used in frequent cycles or just backup power?   Lead Acid depends upon overcharge immunity, thee may not have that.  If they are not overcharging the good cells the weak cells will continue to discharge until the battery has some very weak cells.

On Tue, Jan 30, 2018 at 9:42 AM, Tom Duffy <Tom at solar-biz.com<mailto:Tom at solar-biz.com>> wrote:
We have a situation with a customer's Aquion (Understand there's now longer a warranty) I spent some hours looking at the Aquions. I tested the voltage of each cell. 4 out of the 6 stacks  had a cell that was low, in the range of 0, 3, 4, volts, while all the rest were above 6.

Each of the cells has a test point above the connector. The cells that were low each have corrosion on the positive terminal, such as you see in the photo. Any ideas as to what is causing this? Has anyone seen this before?


Kind regards

Tom Duffy
Senior Solar Design Engineer


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International: 575-539-2111 X 122<tel:575-539-2111%20X%20122>
SKYPE Address: thesolarbiz (e-mail first)


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