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APPENDIX-4 : BATTERY CHARGING CURRENT AS PER BANK SIZE
Battery charging is an important feature of hybrid inverters. The charging voltage and more importantly
charging current depends on the battery type and battery capacity connected.
Since all hybrid inverters are dispatched with some standard settings assuming a certain size of battery bank, it
is very important to discuss these assumptions in detail. The user is requested to check if the actual battery size
matches this and in case not, then change the current settings to match the size battery bank installed.
To decide the battery charging current please contact your battery manufacturer. However, as a rule of thumb,
find the AH capacity of your bank and divide it by 10. The value you arrive at is the charging current you need to set
on DKU.
The default setting assumes a certain battery bank size. The value of battery bank has been assumed for a 4
hour back up at 100% load for Inverter of any size. For e.g., for a 48V/ 3kVA inverter, battery bank of 400AH has
been assumed because if 3kW load is connected then this bank will give a backup of 4 hours.
The calculation of how this value is reached is based on assumptions and is conditional. The manufacturer does
not guarantee any such back up duration and shall not be held responsible whatsoever. The below chart lists out
the battery bank capacities assumed for various inverter sizes.
Note: * Above battery AH just assumption for making battery charging default current setting, please set the
actual battery charging current as per available at user end.
* In case your inverter is not listed in the above chart, please contact the manufacturer.
Table 17
