Off-grid component requirements
Off-Grid Inverter
Converts stored DC power into usable AC supply.
The off-grid inverter supplies selected AC loads from the battery bank and solar input. It must be sized not only for running watts, but also for surge loads from motors, pumps, compressors and refrigerators.
Role in the System
Converts DC battery power into AC output.
Supports selected critical circuits.
Handles appliance starting surge within its rated capacity.
Sizing Checks
Total running load in watts.
Peak surge load for motors and compressors.
Battery voltage compatibility.
Output waveform and voltage.
Continuous power, peak power and overload duration.
Required Documents
Inverter datasheet.
Warranty card.
Load list with running and surge watts.
Single-line diagram.
Commissioning test report.
Safety Checks
AC output protection with correct MCB/RCCB where applicable.
Earthing and neutral bonding approach as per design.
Battery cable size and fuse rating.
Ventilation and clearance around inverter.
Separate heavy/non-critical loads when required.
Handover Records
Inverter model, kVA/kW rating and battery voltage.
Selected circuits served by inverter.
Alarm code and shutdown guidance.
Commissioning readings.
Maintenance Notes
Keep inverter dust-free and ventilated.
Review alerts, overload events and fan operation.
Avoid adding new heavy loads without checking inverter capacity.