Folks, I have a customer with a 3 year old system in northern CA:
8 - Deka 370AH, 6V, 2x4 banks - 740Ah @ 24V 2 - DR2424 120/240V series 4 - EC-120-GL 1 - C40 CC 1 - 5000W, old portable gas gen The problem is increased gen runtime probally due to chronic undercharging. Based on estimated consumption in the home, I think he needs about 2X the PV to meet the energy production needs in the summer (5 kWH/day)(30% DOD/day). But in order to get C10 charging during the summer he would need 5X the PV? Money is and issue. So what should I recommend: 1 - Increase PV 4X to 5X, add MPPT controller to get to a PV based system with gen support 2 - Get a 3K to 5K propane gen and and run as a gen based system with PV support 3 -? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com
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