Size A Battery Bank; Step 1. Wear Insulating Gloves - Renogy Riv2420P2-23S Benutzerhandbuch

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 24V 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 = 230V * 0.4A = 92Watts
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)
92W x 12h = 1104Wh
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 24V, supported voltage of the inverter as a reference.
1104Wh/24V = 46 Ah
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:
46Ah x Oversize x Efficiency Losses = Recommended Amp-Hour
46Ah 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.
You will need a battery charging source as this is a non-charging inverter and will only work
to deplete the battery.
Actual battery quantities vary by battery capacity and rates of discharge.

Step 1. Wear Insulating Gloves

Insulating
Gloves
EN
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