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Estimating battery requirements
40
To calculate the battery capacity you require, read
“Estimating battery requirements” and “Battery sizing
example” on page B–41, and then complete the “Battery
sizing worksheet” on page B–42.
Estimating battery requirements
To determine how much battery capacity you need:
1. Determine how many watts are consumed by each
appliance you will operate from the HI400. You can
normally find this on a label on the product. If only the
current draw is given, multiply it by 115 to get the power
consumption in watts.
2. Estimate how many hours each appliance will be
operating each day.
3. Calculate the daily watt-hours needed for each appliance.
4. Add the total number of watt-hours needed for all the
appliances and multiply it by the number of days between
charges.
5. Divide the total watt-hours of AC load between charges
by 10. This gives the battery Ah used between charges.
6. Double the total Ah used between charges to get the
recommended battery size in Ah.
See the battery sizing example that follows on the next page.