Hi first post, I couldn't find a new member forum so hope its ok diving straight in.
Im planning an off grid system that will reduce my bill by some 80%, my average daily wattage use is 10kwatts.
I have a shallow east west roof and am considering buying a Must, 3000w-24v-mppt-50a with max input pv voltage of 100v.
My battery will be a 8 segment 230amp, 24v system with bms. So over 5kw. Im not fussed about extra battery capacity because i will just switch back to the house supply.
I am thinking about buying JA 450 watt panels and placing 4 on the west facing and 4 on the east side of roof, so total panels some 3200 watts.
I plan to put the 8 panels into 4 series pairs, so the input into the inverter will be 90v (oc) and 22amps from the east panels and the same in the afternoon from the west panels.
The literature for this Must inverter states that the max pv should be 1500watts, so maybe I should buy the 60amp inverter which allows 2000 watts of pv. I dont know how the east and west facing panels power would combine, in a high sun both sides of the roof receive sun light but not at a productive angle.
One last question, my Must inverter has a mains input connection for charging the batteries and providing power if the solar and battery power is not sufficient. The output of my system would be totally independent of the existing electrics so do i need to run a separate earth wire or would the mains input to the inverter provide an adequate earth.
Will these components and panel array work together in my planned way. Thanks for reading and I know there lots of questions.
Ps would my panels need a seperate earth when only at 90voltd oc. I intend to fuse all panel strings.
Is there a newer Must inverter that would be suitable?
Im planning an off grid system that will reduce my bill by some 80%, my average daily wattage use is 10kwatts.
I have a shallow east west roof and am considering buying a Must, 3000w-24v-mppt-50a with max input pv voltage of 100v.
My battery will be a 8 segment 230amp, 24v system with bms. So over 5kw. Im not fussed about extra battery capacity because i will just switch back to the house supply.
I am thinking about buying JA 450 watt panels and placing 4 on the west facing and 4 on the east side of roof, so total panels some 3200 watts.
I plan to put the 8 panels into 4 series pairs, so the input into the inverter will be 90v (oc) and 22amps from the east panels and the same in the afternoon from the west panels.
The literature for this Must inverter states that the max pv should be 1500watts, so maybe I should buy the 60amp inverter which allows 2000 watts of pv. I dont know how the east and west facing panels power would combine, in a high sun both sides of the roof receive sun light but not at a productive angle.
One last question, my Must inverter has a mains input connection for charging the batteries and providing power if the solar and battery power is not sufficient. The output of my system would be totally independent of the existing electrics so do i need to run a separate earth wire or would the mains input to the inverter provide an adequate earth.
Will these components and panel array work together in my planned way. Thanks for reading and I know there lots of questions.
Ps would my panels need a seperate earth when only at 90voltd oc. I intend to fuse all panel strings.
Is there a newer Must inverter that would be suitable?