[RE-wrenches] For Big Bank Off Grid System Connoisseurs

[Mark Frye]

In this case the 4 individual banks are connected to a common buss.  All
four buss-to-bank cable sets are of identical lenght.
 
Mark Frye 
Berkeley Solar Electric Systems 
303 Redbud Way 
Nevada City,  CA 95959 
(530) 401-8024 
 <http://www.berkeleysolar.com/> www.berkeleysolar.com  
 

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From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Tom Elliot
Sent: Tuesday, June 22, 2010 10:28 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] For Big Bank Off Grid System Connoisseurs


If you have to parallel 4 banks do it through a buss bar, not by
interconnecting cells.  A few extra cables is a small price to pay for the
added stability and easier maintenance.
 
Tom
 

From: Jeff Oldham <mailto:starpower4u at juno.com>  
Sent: Tuesday, June 22, 2010 7:14 AM
To: re-wrenches at lists.re-wrenches.org 
Subject: Re: [RE-wrenches] For Big Bank Off Grid System Connoisseurs

Those HUP batteries are still under warranty and you very well may have a
free cell waiting for you, give Rob or Jean a call at NWES and run it past
them. They offer 1st rate CS and should take good care of you. You won't get
much for used batteries so I would be inclined to keep them in service even
though 4 strings in parallel is not ideal. I've had reasonable luck with 4
strings paralleled by getting my battery/inverter cables all over the bank,
at the least put 1/2 of your inverters across 2 strings and the other 1/2 on
the remaining 2 strings (still parallel all 4 strings).

You never mentioned an EQ cycle either, with that limited Absorption time it
should happen at least every 6 weeks. 


>From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative
SOLutions 

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