Full Product Manual

Installation
19
Plan an Installation Site Size a Battery Bank Ground DC Wiring AC Wiring
Size a Battery Bank
Battery types and capacity relate to the overall inverter performance. To size a proper battery
bank, you need to identify the loads that you will be utilizing, as well as an estimate duration
(hours/day) you will be using the load. The inverter is only compatible with 12V battery banks
and oversizing should be considered due to efficiency losses.
1. Determine Your Watts (Amps x Volts)
Every electronic will have a sticker or plate identifying the watts directly (W) or will show
you the voltage value (V) as well as amperage (A) which need to be multiplied to get
Watts. The formula is below:
Watts (W) = Volts (V) x Amps (A)
Example: Fan Watts = 120V * 0.4A = 48Watts
2. Estimate Load Run-Time in Watt-Hours (Wh)
Estimate how many hours per day you will be using the load and multiply this by your
Watts per load.
Example: Fan Watts x 12 hours = Watt-Hour (Wh)
46W x 12h = 576Wh
3. Determine Battery Capacity in Amp-Hour (Ah)
Divide your Load Run Watt-Hour result by the battery voltage.
Load Run-Time (Wh)/Battery Voltage (V) = Amp-Hour (Ah)
Use 12V, supported voltage of the inverter as a reference.
576Wh/12V = 48 Ah
4. Oversize the Battery
The calculated Amp-Hour value represents the minimum size battery capacity to run your
load for your intended time. Note that this assumes 100% use of a battery, which is not
recommended. Assuming 50% depth of discharge, you want to multiply this value by 2
and you also want to multiply by 1.25 to account for some efficiency losses.
Formula:
48Ah x Oversize x Efficiency Losses = Recommended Amp-Hour
48 x 2 x 1.25 ≈ 115Ah
Therefore, a 115Ah battery bank, or close, will be able to support a 12-hour run time
while also prolonging battery life for the best system size possible.
NOTE
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You will need a battery charging source as this is a non-charging inverter and will only
work to deplete the battery.
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Actual battery quantities vary by battery capacity and rates of discharge.