Solar PV sizing
Budget PV modules, storage and AC inverter capacity separately using site yield and simultaneous peak demand.
Enable JavaScript for live calculations. Read the method and default example below.
Method and assumptions
- PV target = daily kWh / (peak sun hours × net energy yield factor).
- Storage = daily energy × autonomy / usable fraction. Zero autonomy means no storage budget.
- Inverter AC kVA = peak AC kW × (1 + reserve / 100) / load power factor. It is calculated separately from PV DC kWp.
Before using the result
- Not a string, MPPT or protection design. Check site shading, seasonal yield, inverter DC limits, surge duty, battery conversion losses and manufacturer compatibility.
Worked example
Illustrative default inputs. Enter your project values above.
- Simultaneous peak AC load
- 5 kW
- AC load power factor
- 0.9
- Daily consumption
- 12 kWh
- Site peak sun hours
- 5.5 h/day
- Net energy yield factor
- 0.78
- Module rating
- 550 Wp
- Storage autonomy
- 1 days
- Supply arrangement
- Single phase / two-wire load
- Storage chemistry
- Lithium
- Usable storage fraction
- 85 %
- AC inverter reserve
- 20 %
Default results
- PV array energy target
- 2.8 kWp
- Module count
- 6
- AC inverter capacity budget
- 6.67 kVA
Choose a reference or send your BOQ
Compare relevant product families, then confirm the exact rating, control supply and duty. Price and availability are confirmed with your enquiry.
Technical references
These references support planning. The exact model documentation and a project-specific engineering review govern the final specification.