I was gifted 4 30v 240 watt panels and a 30 amp mppt charge controller. Was wanting an off grid system for cabin. After doing some research at 12v batteries it looks like my controller is only rated for 400w. So I would assume that I could only use one 240w panel with this controller ?
Charge controller sizing
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Can you post a pic or model number of your controller. True MPPT controllers can be over paneled if a pwm controller, you need 12 volt panels for a 12 volt system.2 Kw PV Classic 200, Trace SW 4024 460ah, -
ML2430
MPPT Solar Charge Controller
Battery Voltage: 12V/24V Auto
Charging Current: 30A Load Current: 20A Max. Voltage of PV: 100V(25℃)。90V(25℃) Max. Power of PV: 400W/12V; BOOW/24V,
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Can't find it online. The max. voltage rating says, likely real.
You should be able to series wire two panels and over panel by 80 watts. Most likely you won't see more than 400 watts from those panels anyway.2 Kw PV Classic 200, Trace SW 4024 460ah,Comment
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