Hybrid proposal readiness
Project verificationBattery and Backup Mode
The operating rules that define what remains powered, for how long and with what reserve.
A hybrid battery does not automatically back up the full property. The proposal must define critical circuits, inverter power, usable battery energy, reserve state of charge, transfer behavior, solar recharge and the owner's preferred balance between daily savings and outage readiness.
Collect
Gather complete and legible inputs
Verify
Check the site, equipment and current process
Record
Keep confirmed decisions in the project file
Why It Matters
How this information affects design, approval, cost and project reliability.
- Backup output has a finite continuous and surge-power rating.
- Battery capacity is reduced by reserve, operating limits and conversion losses.
- Savings priority may use more battery every day, leaving less emergency reserve.
- Grid failure changes how circuits, neutral, earthing and solar generation operate.
- Clear backup scope prevents unsafe wiring and unrealistic runtime expectations.
Complete Checklist
Everything that should be collected or confirmed for this readiness topic.
- Critical-load circuit schedule.
- Normal running load and largest starting surge.
- Target backup duration under a stated load scenario.
- Inverter continuous, surge and backup-output capability.
- Battery nominal and usable capacity plus charge/discharge power.
- Minimum reserve state of charge.
- Self-consumption, time-of-use or backup-priority mode.
- Transfer time and suitability for sensitive loads.
- Daytime PV operation and battery-recharge behavior during outages.
- Heavy-load exclusion, automatic load shedding or manual operating rules.
Verification Process
The practical sequence used to review and confirm the information.
- Map essential circuits into the proposed backup DB.
- Compare running and surge power with inverter limits.
- Calculate expected runtime from usable battery energy.
- Confirm inverter-battery BMS compatibility.
- Program reserve and operating mode.
- Simulate grid failure and verify selected circuits.
- Test recovery when grid power returns.
- Train the owner on modes, alarms and emergency load reduction.
Common Issues to Avoid
Frequent gaps that cause redesign, delay, rejection or unrealistic expectations.
- Battery kWh is confused with inverter kW.
- Whole-home backup is implied without a circuit or surge study.
- Runtime is quoted without a defined load and reserve.
- Heavy loads remain connected and cause overload trips.
- Battery reserve is changed without understanding outage impact.
- Solar recharge during outage is assumed without verifying the inverter architecture.
Records Produced
The documents or outputs that should remain in the final project file.
- Backup-load schedule.
- Inverter power and surge check.
- Usable battery and runtime calculation.
- Reserve and operating-mode record.
- Grid-failure and restoration test report.
- Owner backup-operation guide.
Ready When
The completion conditions that allow the proposal to move forward confidently.
- Backed-up and non-backed-up circuits are clearly identified.
- Inverter power and surge capability cover the agreed loads.
- Runtime is tied to a documented load and reserve assumption.
- Battery and inverter compatibility is confirmed.
- Grid-failure operation is tested and understood by the owner.
Important planning note
Actual runtime varies with simultaneous appliance use, starting surges, battery condition, temperature, configured reserve and solar availability during the outage.