FranklinWH aPower 2
The FranklinWH aPower 2 is a high-capacity residential energy storage solution designed to provide reliable backup power and intelligent energy management for modern solar systems. Utilizing lithium iron phosphate (LFP) chemistry, the system delivers enhanced thermal stability, long cycle life, and safe operation under continuous use. Its modular architecture supports scalable configurations, allowing systems to be tailored to specific load demands and backup needs, including whole-home applications. With fast response times and high continuous power output, the aPower 2 can support critical loads or full-home operation during grid outages while also enabling time-of-use optimization and improved self-consumption. Housed in a durable, weather-resistant enclosure suitable for indoor or outdoor installation, and manufactured by FranklinWH, the aPower 2 offers a balanced combination of performance, flexibility, and long-term reliability for projects focused on energy resilience and independence.
Specifications
FranklinWH aPower 2
15 kWh AC-coupled residential energy storage system engineered for whole-home backup, load management, and energy resilience. Lithium Iron Phosphate (LFP) battery chemistry provides enhanced thermal stability, long cycle life, and reliable performance for daily cycling and emergency backup applications. The system supports self-consumption, time-of-use optimization, and off-grid-ready operation, with scalable expansion up to 225 kWh per aGate system.
Electrical (AC Output / Storage)
15 kWh usable AC energy capacity per unit · 8 kW continuous charge power · 10 kW / 11.5 kVA continuous discharge output · 15 kW peak output for 10 seconds · 25 kW transient load capacity for 1 second
120/240 V or 120/208 V AC · 60 Hz · AC-coupled architecture · 90% round-trip efficiency
Maximum continuous output current up to 48 A depending on configuration · 10 kA short-circuit current rating · Supports motor starting loads up to 185 A LRA
Thermal Performance
Lithium Iron Phosphate (LFP) chemistry optimized for thermal safety and long-term cycling durability
Operating temperature range −4 °F to 122 °F (−20 °C to 50 °C) · Operates up to 131 °F (55 °C) with derated output
Natural convection cooling · 30 dBA typical operating noise · 45 dBA maximum operating noise
Physical
45.2 × 29.5 × 11.8 in enclosure dimensions · 357 lb installed weight
Wall-mount or floor-mount installation options · Type 3R outdoor-rated enclosure
IP56 wiring compartment protection · IP67 battery pack and inverter protection
Durability & Ratings
Indoor and outdoor rated for residential installation environments
Flood resistance up to 29 in from the bottom of enclosure · Up to 100% RH condensing humidity tolerance · Maximum installation altitude 9,843 ft
Certified to UL 9540, UL 9540A, UL 1973, UL 1741, and IEEE 1547 standards · FCC Part 15 Class B compliant · AC 156 seismic certified
Warranty
15-year limited product warranty
60 MWh throughput warranty
15 kWh usable capacity | 10 kW continuous output | Lithium Iron Phosphate (LFP) technology