Current setup: 4 Renogy 100W 12V panels, Renogy Voyager 20A PWM controller, 3 deep-cycle marine batteries 12V, 2 at 100Ah and 1 at 75Ah, Cantonape 1000W inverter, and the only load is a greenhouse roof blower of approximately 1A. All wiring after controller is 12GA.
I know the controller is not sufficient with full panel output, but in the winter I'm getting well less than 20A, and plan to replace it with an MPPT controller before summer.
My problem is battery life. Several times with just 2 panels and 2 batteries the batteries were depleted below threshhold voltage and the inverter shut down. I added 2 more panels, and then another battery. There should be 275Ah available with full charge, but I'm consistently getting 40-70Ah showing on the controller. The whole setup seems to me like overkill, but it still shuts down after 2 days of overcast.
What am I doing wrong? This is the first time I've used solar. The greenhouse is a good distance from the house, and we were hoping to keep it off-grid and use the solar for the blower and maybe an LED light when it's dark and a USB charger for a speaker or phone. I've screwed up somewhere, but I can't figure out where.
I know the controller is not sufficient with full panel output, but in the winter I'm getting well less than 20A, and plan to replace it with an MPPT controller before summer.
My problem is battery life. Several times with just 2 panels and 2 batteries the batteries were depleted below threshhold voltage and the inverter shut down. I added 2 more panels, and then another battery. There should be 275Ah available with full charge, but I'm consistently getting 40-70Ah showing on the controller. The whole setup seems to me like overkill, but it still shuts down after 2 days of overcast.
What am I doing wrong? This is the first time I've used solar. The greenhouse is a good distance from the house, and we were hoping to keep it off-grid and use the solar for the blower and maybe an LED light when it's dark and a USB charger for a speaker or phone. I've screwed up somewhere, but I can't figure out where.
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