headline bars
headline bars
tabs
continuation tabs
notes
warnings
12
GETTING STARTED
model no. 011-2102-0 | contact us 1-888-942-6686
tion tabs
NOTE:
The type of batteries you use to power your high-power inverter is important. Operating a high-power
inverter will routinely discharge batteries and they will require frequent recharging. Batteries used to
start engines are not designed to repeatedly charge and discharge.
recommends using
“deep-cycle” or “marine” rated batteries.
Eliminator
®
DETERMINING THE DC POWER REQUIREMENTS
Powering multiple appliances from the high-power 011-2102-0 power inverter requires a 12 V battery
OR a bank of batteries (several batteries). If using a bank of batteries, to calculate the approximate power
in amps a 12 V battery bank has to supply, you need to know the current or amps required for powering
the continuous AC load. A shortcut method is to divide the continuous AC load wattage by 10. For example,
the continuous AC load is 3000 W, the current (amps) is: 3000/10 or 300 A at 12 V DC.
SIZING THE BATTERY BANK
To determine the minimum battery bank ampere-hour rating that you will need to operate appliances from
the inverter, and any DC appliances powered by the battery bank, follow these steps:
1.
List the maximum wattage that the inverter has to provide (as above).
2.
Estimate the number of hours the appliances will be in use between battery recharges. This will differ
depending on appliances. As an example, a typical home-use coffeemaker draws 500 W during
its brew time of 5 minutes; it maintains the temperature of the pot at about 100 W. Typical use of
a microwave oven is only for a few minutes. Some longer operating time appliances are lamps, TVs,
computers and refrigerators/freezers.
3.
Determine the total watt-hours of energy needed. Then multiply the average power consumption in
watts by the number of hours of run time. For example: 3000 W for 10 hours = 30,000 Wh.
Using the 3000 W (or 300 A) for 10 hours example above, then 300 A is needed for 10 hours.
This provides us with the basic amp-hours (Ah) of battery that is required. Ten hours at 300 A
equals 3000 amp-hours (Ah).
This answer is just a beginning because there are other conditions that determine actual run time.
These include:
• AC appliance load and time in use (basic amp hour)
• Cable gauge and length (cable losses)
• Charge level of the batteries (between use, chargers have to be able to fully charge the batteries)
• Temperature of the batteries (colder batteries provide fewer amps)
• Age and condition of the batteries (older batteries lose capacity/amp-hours)
• Compliance with turning off unnecessary AC and DC loads. If there is any doubt about sizing the
battery bank, it is safe to overestimate the amp-hour requirements of the battery bank.
tion tabs
