RE: [hreg] battery bank questions
I’ll send you some links and information off-line.
Andrew H. Mc Calla
NABCEP Certified Solar Installer
Meridian Energy Systems, Inc. (TECL: 24461)
2300 S. Lamar Blvd., Ste. 107
Austin, Texas 78704
Tel: (512) 448-0055
Fax: (512) 448-0045
From: email@example.com [mailto:firstname.lastname@example.org] On Behalf Of Garth & Kim Travis
Sent: Tuesday, March 18, 2008 11:33 AM
Subject: Re: [hreg] battery bank questions
This is a general question for planning purposes. Also, trying to help
friends that don't have time or understanding to research for
themselves. Quite a few homesteads are located where running power in
is just too darn much money. They are getting along on 3KWH a day of
power or there abouts. The question comes up, how do you expand your
power system? The catch always seems to be that adding batteries to an
existing bank is not a good idea.
If there are ways to get creative and be able to add a second battery
bank, to be able to double a power system down the road, it would be
wonderful to know how to do so.
Garth can understand technical language and ideas, he was an engineering
technician in the oil field until last summer. He dealt with rolling
stock, so mostly 12VDC systems. He has a pretty good understanding of
Garth wants to know how a battery selector would work? The goal is to
get more power to the main system that powers the house. The additional
power needs to be available to the same inverter that is already in use.
Is this possible?
Is there anything special you would do if you planned on adding to a
system down the road? Are there any general principles that apply to
expanding existing systems or are the answers totally dependent on the
Kim & Garth
Andrew McCalla wrote:
> If your old battery is worth keeping, but you definitely need more (new)
> capacity, you can get creative with a battery isolator and, if need be
> and depending upon your load management configuration, a battery
> selector switch.
> This will allow you to charge both batteries with the same charging
> source(s) without the old reducing the efficacy of the new.
> Can you tell us more about your battery (make, model, cell technology,
> AH capacity, series/parallel configuration) , and how much capacity
> want to add?w:st="on">Texas 78704
> *Andrew H. Mc Calla*
> NABCEP Certified Solar Installer
> Meridian Energy Systems, Inc. (TECL: 24461)
> 2300 S. Lamar Blvd., Ste. 107
> Austin ,
> Tel: (512) 448-0055
> Fax: (512) 448-0045
> andrew@meridiansola r.com
>[mailto:hreg@yahoogroups. com] *On Behalf Of
> www.meridiansolar. com <http://www.meridian solar.com/>
> ------------ --------- --------- --------- --------- --------- -
> *From:* hreg@yahoogroups. com
> *Garth & Kim Travis
> *Sent:* Tuesday, March 18, 2008 8:18 AM
> *To:* hreg@yahoogroups. com
> *Subject:* [hreg] battery bank questions
> Garth and I are wondering if there is an efficient way of expanding an
> off grid power system. We do know that adding new batteries to an
> existing bank of batteries is not a great idea, since the new batteries
> will be drawn down to the level of the existing batteries. This is
> taken as gospel in most circles.
> But, if the batteries have been well maintained and are still in the
> first half of their expected lifetime, does this really matter? Is it
> possible to build up to a battery bank, a bit at a time without losing a
> bunch of battery life?
> This is a question that is coming up repeatedly on many homesteading
> lists. The all at once battery bank is a real stopping block to being
> able to afford off grid power, for many people. We thought we would
> pick the brains of HREG and see if we can't find a good answer.
> Bright Blessings,
> Kim & Garth
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