2000SEARAY280SS
Member
It was about 93 degrees and sunny today out on the Potomac and the water temp was 88 degrees. I started the A/C at 1330 on the inverter and it ran until 1700 when the battery voltage sensed by the inverter dropped to 11.5 volts. I set the temp on the A/C to 82 degrees and it maintained this cabin temp the whole run. I’ll save you the math that was 3 ½ hours I was hoping for 5 hours. I was disappointed :smt089 that this was all the time I got out of the batteries.
With the high outside air and water temp I noticed the DC Amp draw was between 45 Amps at 12.5 volts and 57 Amps at 11.5 Amps. An earlier post had the current draw at 30 Amps a lot lower due to outside temps? :huh: The higher Amps were once the DC voltage started dropping off. I could set the low battery trip point on the inverter lower. This would get me a little more time on the inverter, but with the Amps going up as the voltage goes down it would not be a whole lot more time.
So it looks like I might have to combine my house battery with my inverter bank and get a little more power available for each.
Better batteries would also help. I will run another test once the environmental conditions change a little bit.
With the high outside air and water temp I noticed the DC Amp draw was between 45 Amps at 12.5 volts and 57 Amps at 11.5 Amps. An earlier post had the current draw at 30 Amps a lot lower due to outside temps? :huh: The higher Amps were once the DC voltage started dropping off. I could set the low battery trip point on the inverter lower. This would get me a little more time on the inverter, but with the Amps going up as the voltage goes down it would not be a whole lot more time.
So it looks like I might have to combine my house battery with my inverter bank and get a little more power available for each.
Better batteries would also help. I will run another test once the environmental conditions change a little bit.