3. Battery
3.1.1 Match Battery Amp-Hour Capacity to Your Application
Select a battery or system of batteries that will provide your Inverter/Charger with proper DC voltage and an adequate amp- hour capacity to power your application. Even though Tripp Lite Inverter/Chargers are highly efficient at
vehicle’s alternator if the engine is kept running.
Example
•STEP 1) Determine Total Wattage Required
Add the wattage ratings of all equipment you will connect to your
Inverter/Charger. Wattage ratings are usually listed in equipment manuals or on nameplates. If your equipment is rated in amps, multiply that number times AC utility voltage to estimate watts.
(Example: a drill requires 2.8 amps. 2.8 amps × 230 volts = 640 watts.)
NOTE: Your Inverter/Charger will operate at higher efficiencies at about 75% - 80% of nameplate rating.
Tools
13mm (1/2”) Drill | Orbital Sander |
640W + | 220W | = | 860W |
Appliances and Electronics
|
| Desktop Computer with |
Refrigerator | Table Fan | Large LCD Monitor |
540W | + 150W | + | 250W | = 940W |
•STEP 2) Determine DC Battery Amps Required Divide the total wattage required (from step 1, above)
by the nominal battery voltage to determine the DC amps required.
•STEP 3) Estimate Battery
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 with utility- or
NOTE: Battery
940 watts ÷ 12V = 78 DC Amps
78 DC Amps × 5 Hrs. Runtime
× 1.2 Inefficiency Rating = 468
•STEP 4) Estimate Battery Recharge Required, Given Your Application You must allow your batteries to recharge long enough to replace the charge lost during inverter operation or else you will eventually run down your batteries. To estimate the minimum amount of time you need to recharge your batteries given your application, divide your required battery
NOTE! For Tripp Lite Inverter/Chargers providing 1000 watts or less of continuous AC power, a
a
468
Inverter/Charger Rating
=11.7 Hours Recharge
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201110117 | 11/9/2011 10:57:56 AM |