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Your inverter sets the charge and discharge rates a battery can reach. Different inverter models support different rates, depending on how the battery is configured.
The maximum charge rate sets how fast your battery can store excess solar energy. A higher rate means less solar goes unused during peak production hours.
The maximum discharge rate sets how much power your battery can deliver to your home. It determines which appliances you can run at the same time from battery power.
During a blackout, backup discharge rates can be lower than in normal operation. That matters when you size a system to cover essential loads during an outage.
Match the inverter to your battery capacity. An undersized inverter limits charge and discharge rates; an oversized one adds cost you do not need.
| Configuration | Capacity | Max Charge | Max Discharge | Max Backup |
|---|---|---|---|---|
| 1x stack | 5kWh | 2.5 kW | 2.5 kW | 2.5 kW |
| 1x stack | 10/15kWh | 5 kW | 5 kW | 5 kW |
| 2x stacks | 5kWh + 10/15kWh | 5 kW | 5 kW | 5 kW |
| 2x stacks | 10/15kWh | 5 kW | 5 kW | 5 kW |
| Configuration | Capacity | Max Charge | Max Discharge | Max Backup |
|---|---|---|---|---|
| 1x stack | 5kWh | 2.5 kW | 2.5 kW | 2.5 kW |
| 1x stack | 10/15kWh | 5 kW | 5 kW | 5 kW |
| 2x stacks | 5kWh + 10/15kWh | 6 kW | 6 kW | 5 kW |
| 2x stacks | 10/15kWh | 6 kW | 6 kW | 5 kW |
| Configuration | Capacity | Max Charge | Max Discharge | Max Backup |
|---|---|---|---|---|
| 1x stack | 5kWh | 2.5 kW | 2.5 kW | 2.5 kW |
| 1x stack | 10/15kWh | 5 kW | 5 kW | 5 kW |
| 2x stacks | 5kWh + 10/15kWh | 5.75 kW | 5.75 kW | 7.5 kW |
| 2x stacks | 10/15kWh | 5.1 kW | 5.1 kW | 10 kW |
* The iStore 10kW 1P has a maximum charge rate of 5kWh
| Configuration | Capacity | Max Charge | Max Discharge | Max Backup |
|---|---|---|---|---|
| 1x stack | 5kWh | 2.5 kW | 2.5 kW | 2.5 kW |
| 1x stack | 10/15kWh | 5 kW | 5 kW | 3.3 kW |
| 2x stacks | 5kWh + 10/15kWh | 5 kW | 5 kW | 3.3 kW |
| 2x stacks | 10/15kWh | 5 kW | 5 kW | 3.3 kW |
| Configuration | Capacity | Max Charge | Max Discharge | Max Backup |
|---|---|---|---|---|
| 1x stack | 5kWh | 2.5 kW | 2.5 kW | 2.5 kW |
| 1x stack | 10/15kWh | 5 kW | 5 kW | 3.3 kW |
| 2x stacks | 5kWh + 10/15kWh | 6 kW | 6 kW | 3.3 kW |
| 2x stacks | 10/15kWh | 6 kW | 6 kW | 3.3 kW |
| Configuration | Capacity | Max Charge | Max Discharge | Max Backup |
|---|---|---|---|---|
| 1x stack | 5kWh | 2.5 kW | 2.5 kW | 2.5 kW |
| 1x stack | 10/15kWh | 5 kW | 5 kW | 5 kW |
| 2x stacks | 5kWh + 10/15kWh | 7.5 kW | 7.5 kW | 7.5 kW |
| 2x stacks | 10/15kWh | 10 kW | 10 kW | 8.3 kW |
| 3x stacks | 5kWh + 10/15kWh | 10 kW | 10 kW | 8.3 kW |
| 3x stacks | 10/15kWh | 10 kW | 10 kW | 8.3 kW |
| 4x stacks | 5kWh + 10/15kWh | 10 kW | 10 kW | 8.3 kW |
| 4x stacks | 10/15kWh | 10 kW | 10 kW | 8.3 kW |
| Configuration | Capacity | Max Charge | Max Discharge | Max Backup |
|---|---|---|---|---|
| 1x stack | 5kWh | 2.5 kW | 2.5 kW | 2.5 kW |
| 1x stack | 10/15kWh | 5 kW | 5 kW | 5 kW |
| 2x stacks | 5kWh + 10/15kWh | 7.5 kW | 7.5 kW | 7.5 kW |
| 2x stacks | 10/15kWh | 10 kW | 10 kW | 8.3 kW |
| 3x stacks | 5kWh + 10/15kWh | 12.5 kW | 12.5 kW | 8.3 kW |
| 3x stacks | 10/15kWh | 10 kW | 10 kW | 8.3 kW |
| 4x stacks | 5kWh + 10/15kWh | 15 kW | 15 kW | 8.3 kW |
| 4x stacks | 10/15kWh | 15 kW | 15 kW | 8.3 kW |
| Configuration | Capacity | Max Charge | Max Discharge | Max Backup |
|---|---|---|---|---|
| 1x stack | 5kWh | 2.5 kW | 2.5 kW | 2.5 kW |
| 1x stack | 10/15kWh | 5 kW | 5 kW | 5 kW |
| 2x stacks | 5kWh + 10/15kWh | 7.5 kW | 7.5 kW | 7.5 kW |
| 2x stacks | 10/15kWh | 10 kW | 10 kW | 8.3 kW |
| 3x stacks | 5kWh + 10/15kWh | 12.5 kW | 12.5 kW | 8.3 kW |
| 3x stacks | 10/15kWh | 10 kW | 10 kW | 8.3 kW |
| 4x stacks | 5kWh + 10/15kWh | 17.5 kW | 17.5 kW | 8.3 kW |
| 4x stacks | 10/15kWh | 20 kW | 20 kW | 8.3 kW |
Understanding Power Ratings:
* DC charge/discharge power varies from AC power due to inverter efficiency. Always consult with your installer for specific system design.
High solar production: Perth's strong solar conditions mean your battery will often charge at its maximum rate through summer. Check that your inverter can handle peak solar production.
Air conditioning load: Perth homes often run high air-conditioning loads in summer. Choose an inverter with enough discharge capacity to run your air conditioner from the battery during peak tariff periods.
Network constraints: Western Power sets specific requirements for inverter settings. Your installer configures export limits and grid-support functions to meet them.
Future expansion: If you plan to add battery capacity later, choose an inverter that supports multiple battery modules or higher-capacity configurations.