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Hi, I have 12v DC 1200ah storage. It has a 4000w 240v AC inverter connected to this storage. If I draw a 3000w load (water heater) from the inverter, how long will my DC storage last? |
June 06, 2018 |
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You can store 1200Ah at 12V. This is 14400 Wh. Taking 3000W this would last about 4.5h if everything is 100% efficient. But with actual efficiencies of 80% this would reduce to 3.5h. The 12V DC wiring has to pass 250A so it needs to be real beefy. Recharging your storage at say 10A will take over 5 days. The storage is being hammered real hard so needs to be heavy duty. |
by mikerogerswsm June 06, 2018 |
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Thank you for your answer. I am expecting constant draw for 35-45 minutes to gain desired temperature followed by intermittent bursts to retain heat. Charging is at 90V 36A max. (solar) Thank you for the tip on the DC Amperage required to make this work. |
June 06, 2018 |
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