Yeah, Rob, you and I have talked about this before regarding 12V required for generator start/control with a 48V battery bank. In that case we did the inefficient thing by charging the generator starting battery with a 12V charger off the AC output of the inverter. A separate PV panel was the more expensive option. I appreciate your input on this.
What can you tell us about battery equalizers as an alternative to DC-DC converters?? Jason Szumlanski Fafco Solar -----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Rob Shappell Sent: Friday, September 02, 2011 8:24 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] unique battery bank design question I never, never recommend taps of any sort, but sometimes we have to satisfy the needs of the customer. If any taps are done in any manner I would recommend AT LEAST an annual reconfig of the taps. To reduce and/or eliminate the imbalance of the 12 volt and 24 volt taps, you could install a 12 volt charging source to the 12 volt tap, a 24 volt charging source to the 24 volt tap and the 48 volt loads get a 48 volt charging source. The array is still calculated the same, just distributed different through different controllers. Is this bullet proof or perfect? Nope, but neither are DC/DC converters and the system is much more efficient too. Rob Shappell _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & 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
