Key specifications
- Usable capacity
- 15 kWh
- Continuous output
- 10 kW
- Peak / surge capability
- 15 kW for 10 seconds
- Maximum continuous charge power
- 8.0 kW per full unit
- Battery chemistry
- Lithium iron phosphate (LFP)
- System architecture
- AC-coupled
- Warranty
- 15 years or 60 MWh throughput
- Scalability
- Up to 225 kWh / 15 units per aGate
Charging-power context
FranklinWH publishes 8 kW continuous real charge power for aPower 2. Multi-battery system behavior still depends on aGate design, conductors, controls and the installed architecture.
Charge-limit source reviewed: 2026-08-29. The outage planner keeps the total system charge limit editable because expansion packs and multi-battery architectures do not always scale as a simple per-unit multiplication.
What stands out
- 15 kWh usable system energy per unit.
- Designed for whole-home backup and heavy residential loads.
- Published maximum charge power is 8 kW continuous.
Before choosing a battery
Check which loads you want to back up, their starting power, expected outage duration, utility time-of-use rates, export compensation and how quickly the battery can recharge from available solar. Installed battery cost also depends on service equipment, controller/gateway hardware and electrical work.
The Battery Quote Calculator starts with a blank price field and uses only the installer package total you enter. Outage links preserve verified catalog charge-limit provenance when available. Multi-unit and expansion architectures still require manufacturer and installer verification.