Has anyone tried using a battery management system (BMS) like those used on electric vehicle battery banks? Here is an example: http://www.manzanitamicro.com/products?page=shop.product_details&flypage=flypage.tpl&product_id=87&category_id=22
Randy Brooks Brooks Solar, Inc. Solar Power for People 140 Columbia View Chelan, WA 98816 509-682-9646 ra...@brookssolar.com www.BrooksSolar.com On Mar 15, 2013, at 8:05 PM, Dan Fink <danbo...@gmail.com> wrote: > This has been happening all too frequently here. We live in a big area > of off grid homes, dozens of systems. > Lost a customers Trace 2624 this morning; One L-16 in older 24v bank > opened internally. PV array/MPPT control zorched inverter as soon as > the sun came up. First indication of problems last nite when customer > hit microwave to warm up dinner and inverter went crazy. This morning > the bad battery showed 3.2v (yes, I would expect 2 or 4 also) the rest > the usual 6+v. Turned on PV array, bad battery immediately up to 11v > (yes, 6v L16). > > Somebody needs to build a "battery condom" with big stacked diodes on > a big heat sink or some such solution. A voltage brick wall for system > charging inputs. MPPT PV controllers do NOT protect a inverter from > input overvoltage if all or part of the battery bank disappears! And > last year we saw a nice battery box fire and zorched inverters due to > similar -- dual 48v L16 strings, one cell failed and opened, other > string dumped everything into the bad one, smoke and flames. Parallel > fusing would have stopped that......but not stopped the loss of dual > stacked XW inverters from PV overvoltage. > > Or am I missing something here? > > Dan Fink, > Executive Director; > Otherpower > Buckville Energy Consulting > Buckville Publications LLC > NABCEP / IREC accredited Continuing Education Providers > 970.672.4342 > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Change email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org >
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