Anker SOLIX C2000 Gen 2 Extra Battery

Anker SOLIX BP2000 (Gen 2) Expansion Battery

This doubles a C2000 Gen 2 from 2,048 Wh to 4,096 Wh. It adds capacity only, not output: the AC rating stays at 2,400 W continuous and 4,000 W peak, because the inverter lives in the power station rather than the battery. What changes is how long you can run at that rating. Anker measures it as a dual-door fridge going from about 32 hours to about 64.

The same LFP chemistry as the host unit, rated at 4,000 cycles to 80 percent capacity, and it stacks under the C2000 Gen 2 with a battery-to-host cable. Worth checking before you order: this pairs with the C2000 Gen 2 specifically. The C1000 Gen 2 does not support expansion at all, which is the trade Anker made to keep that model smaller and lighter.

• Doubles capacity to 4,096 Wh: Two full kilowatt-hours added to the 2,048 Wh in the C2000 Gen 2 itself.
• Same 4,000-cycle LFP cells: Rated to retain 80 percent capacity after 4,000 charge cycles, matching the host unit rather than becoming the weak link.
• Runtime, not more power: Output stays at 2,400 W continuous and 4,000 W peak. This buys hours, not headroom for bigger appliances.
• Stacks and connects: Sits under the C2000 Gen 2 and connects with the battery-to-host cable. No tools, no configuration.

Renewable Outdoors is an authorized Anker SOLIX dealer. Our Price Match Guarantee applies to every order — call us at (303) 876-7654 if you're unsure which part fits your system and we'll check it for you.