Hi all,
I'm in Puerto Rico and wanted a back-up solar power system for this coming hurricane season and just power cuts in general. I'm not really interested in a whole home power system as I can't afford it. I was able to get a deal on x2 12V 100ah AGM batteries (new) for the battery bank. I've already used a kill-a-watt meter to measure how much power my appliances use, so it'll be a case of powering what I can, for as long as I can - aiming to discharge the battery no more than 30-40% to extend its lifespan.
So working backwards;
1. Am I correct that the max PV array for 24V 100ah AGM battery is going to be between 400-700W? Or could I go higher? If it's 700W, I would aim for x2 350W panels.
2. Charge controller for 700W array would need to cope with (700/24) 29.1Amps but a 40A mppt would be the choice?
3. On a 24V 100ah battery what's the upper limit for an inverter? Should it match the PV array which if the max is 700W, my inverter should be 700W?
Thanks for any input you have!
I'm in Puerto Rico and wanted a back-up solar power system for this coming hurricane season and just power cuts in general. I'm not really interested in a whole home power system as I can't afford it. I was able to get a deal on x2 12V 100ah AGM batteries (new) for the battery bank. I've already used a kill-a-watt meter to measure how much power my appliances use, so it'll be a case of powering what I can, for as long as I can - aiming to discharge the battery no more than 30-40% to extend its lifespan.
So working backwards;
1. Am I correct that the max PV array for 24V 100ah AGM battery is going to be between 400-700W? Or could I go higher? If it's 700W, I would aim for x2 350W panels.
2. Charge controller for 700W array would need to cope with (700/24) 29.1Amps but a 40A mppt would be the choice?
3. On a 24V 100ah battery what's the upper limit for an inverter? Should it match the PV array which if the max is 700W, my inverter should be 700W?
Thanks for any input you have!
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