How many Ah
I need a battery bank to power a mini fridge 1.3 amps @ 120v for 48 hours and a electric blanket 200 watts @120v 8 hours as well as computer and cell phone charging, how many Ah will I need?
Forum Discussion
You may want to use the divide by 10 rule-of-thumb when converting 120VAC Watts to 12VDC Amps.
Example: 100W at 120V = 0.833A. If you use the times 10 method(10 * .833= 8.33) to estimate battery draw as 8.33, you will underestimate the effective draw.
Instead use 100 / 10 =10Amps. The difference is at least an estimate of what needs to be put back into the battery.
Like Mex says, it is an art.
HTH;
John
Example: 100W at 120V = 0.833A. If you use the times 10 method(10 * .833= 8.33) to estimate battery draw as 8.33, you will underestimate the effective draw.
Instead use 100 / 10 =10Amps. The difference is at least an estimate of what needs to be put back into the battery.
Like Mex says, it is an art.
HTH;
John
