
• STEP 2: Determine DC Battery Amps Required Divide the total wattage required (from step 1, above) by the battery voltage (12) to determine the DC amps required. • STEP 3: Estimate Battery Amp-Hours Required (for operation unsupported by the alternator) Multiply the DC amps required (from step 2, above) by the number of hours you estimate you will operate your equipment exclusively from battery power before you have to recharge your batteries. Compensate for inefficiency and wiring losses by mu