I'd replace the controller with a mppt model, wire the panels in series (to 48v nominal), and leave the battery bank at 24v.
Decoupling the panel voltage from the charging voltage let's you start charging a bit earlier, and keep charging a bit longer; plus mppt is a bit more efficient than pwm. Most importantly, it let's you double your panels (which is your best bet overall), without having to increase the gauge of your wiring. --Eric Sent from my Samsung Galaxy Note® 3 -------- Original message -------- From: Mike Lyon Date:11/19/2013 8:29 PM (GMT-08:00) To: WISPA General List Subject: Re: [WISPA] Solat panels: series or parallel? And it has about a 5 amp load... > On Nov 19, 2013, at 20:23, Gary Garrett <[email protected]> wrote: > > You probably need more Sun, or less load. > It sounds like you have it wired correctly. > The panels should tilt south about the same angle as your Lattitude. > Up here on the canadian border we are at 48 degrees lattitude so the > panels tilt about 45 degrees. > In the summer they lay flat. > > Gary > > > >> On 11/19/2013 7:43 PM, Mike Lyon wrote: >> So i'm trying to figure out what i need more of, voltage or current? >> >> I have 2x, 300 watt, 24vdc panels. I currently have them wired in >> parallel to a Morningstar SS20L-24 which in turn is hooked up to 4 >> banks of 2x 12vdc deep cycle batteries (for a 24vdc system). I plan on >> replacing these batteries soon with UB4Ds or something similiar. >> >> What would be best to keep these beasts charged? The solar panels >> wired in series or parallel? >> >> Thanks, >> Mike >> _______________________________________________ >> Wireless mailing list >> [email protected] >> http://lists.wispa.org/mailman/listinfo/wireless > > _______________________________________________ > Wireless mailing list > [email protected] > http://lists.wispa.org/mailman/listinfo/wireless _______________________________________________ Wireless mailing list [email protected] http://lists.wispa.org/mailman/listinfo/wireless
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