A battery-only expansion module that adds 13.5 kWh of additional storage to an existing Powerwall 3 system, drawing on the primary unit's integrated inverter. Up to 3 units can be paired for 54 kWh total.
Key Specs
- Usable Capacity Added: 13.5 kWh
- Max Units per System: 3 (paired with 1 Powerwall 3)
- Max Combined Capacity: 54 kWh
Electrical
- DC voltage range: 52-92V (parallel)
Physical
- Dimensions: 43.5"H x 24"W x 6.6"D
- Weight: 261.2 lbs
- Certifications: UL 1973, UL 9540, UL 9540A
Warranty
- Typical Coverage: Powerwall is warranted free from defects for ten years following initial installation, retaining at least 70% energy capacity at 10 years for solar self-consumption, time-based control, and backup applications, with unlimited cycles. Full 10-year coverage requires the unit to remain reliably connected to the internet for remote firmware updates; extended loss of connectivity can limit warranty coverage to 4 years.
- Eligibility: Warranty eligibility depends on purchase channel — our team confirms coverage for your specific order before you buy.
