Expansion batteries add capacity without buying a second station, but each one works only with specific models. We compared nine official expansion packs on capacity, energy per kilogram and cycle rating, and list the stations each maker says they fit.
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Why it wins: The most capacity and energy per kg here. 5,040 Wh. Best Wh/kg here.
Also great: EcoFlow DELTA Pro 3 Smart Extra Battery (7.5) · Anker SOLIX BP3800 Expansion Battery (6.6)
Swipe sideways on mobile. Green marks the best figure in each column.
| Product | Score | Capacity | Energy per kg | Cycle rating | Best for | Price | Buy |
|---|---|---|---|---|---|---|---|
| 1 J Jackery Battery Pack 5000 Plus | 8.6/10 | 5040 Wh | 136.2 Wh/kg | 4000 cycles | The most capacity and energy per kg here | Check price | View deal |
| 2 E EcoFlow DELTA Pro 3 Smart Extra Battery | 7.5/10 | 4096 Wh | 124.1 Wh/kg | Not listed | 4 kWh more for the DELTA Pro 3 | Check price | View deal |
| 3 AS Anker SOLIX BP3800 Expansion Battery | 6.6/10 | 3840 Wh | 116.3 Wh/kg | Not listed | 3.84 kWh packs that stack up to six on an F3800 Plus | Check price | View deal |
| 4 AS Anker SOLIX BP2000 Expansion Battery (Gen 2) | 5.8/10 | 2048 Wh | 133.9 Wh/kg | Not listed | A light 2 kWh pack for the C2000 Gen 2 | Check price | View deal |
| 5 B BLUETTI B300K Expansion Battery | 4.8/10 | 2764.8 Wh | 93.7 Wh/kg | 6000 cycles | The widest compatibility and a 6,000-cycle rating | Check price | View deal |
| 6 J Jackery Battery Pack 2000 Plus | 3.8/10 | 2042.8 Wh | 107.5 Wh/kg | 4000 cycles | Adds 2 kWh to the Explorer 2000 Plus | Check price | View deal |
| 7 E EcoFlow DELTA 2 Max Smart Extra Battery | 3.3/10 | 2048 Wh | 107.8 Wh/kg | 3000 cycles | Adds 2 kWh to DELTA 2, DELTA Max or DELTA 2 Max | Check price | View deal |
| 8 B BLUETTI B230 Expansion Battery | 2.7/10 | 2048 Wh | 93.9 Wh/kg | 3500 cycles | A 2 kWh pack that also works as a power bank | Check price | View deal |
| 9 E EcoFlow RIVER 3 Plus Smart Extra Battery (600) | 1.2/10 | 572 Wh | 98.5 Wh/kg | 3000 cycles | A clip-on pack that doubles as a 140 W USB-C power bank | Check price | View deal |
"Not listed" means the manufacturer page we used does not publish that figure. Prices show "Check price" until a retailer feed provides a current price.
| Capacity | 5040 Wh |
|---|---|
| Energy per kg | 136.2 Wh/kg |
| Cycle rating | 4000 cycles |
| Capacity | 45 Ah / 112 V (5,040 Wh) |
| Cycle rating | 4,000 cycles to 70%+ |
| Fits | Jackery Explorer 5000 Plus |
| Certification | UL 1973 (Jackery) |
| Weight | About 81.57 lb (37 kg) |
| Warranty | 5 years |
| Price | Check price |
| Capacity | 4096 Wh |
|---|---|
| Energy per kg | 124.1 Wh/kg |
| Cycle rating | Not listed |
| Capacity | 4,096 Wh |
| Fits | DELTA Pro 3 (up to 12 kWh total) |
| Weight | 33 kg |
| Dimensions | 694 × 295 × 215 mm |
| Note | EcoFlow says this pack will not be restocked |
| Price | Check price |
Best for: 3.84 kWh packs that stack up to six on an F3800 Plus
| Capacity | 3840 Wh |
|---|---|
| Energy per kg | 116.3 Wh/kg |
| Cycle rating | Not listed |
| Capacity | 3,840 Wh |
| Fits | Anker SOLIX F3800 Plus (up to 6) and F3800 |
| Weight | 72.8 lb |
| Price | Check price |
| Capacity | 2048 Wh |
|---|---|
| Energy per kg | 133.9 Wh/kg |
| Cycle rating | Not listed |
| Capacity | 2,048 Wh |
| Chemistry | LFP |
| Fits | Anker SOLIX C2000 Gen 2 |
| Weight | 15.3 kg |
| Price | Check price |
| Capacity | 2764.8 Wh |
|---|---|
| Energy per kg | 93.7 Wh/kg |
| Cycle rating | 6000 cycles |
| Capacity | 2,764.8 Wh |
| Chemistry | LiFePO4 |
| Cycle rating | 6,000+ to 80% |
| Fits | AC200L, AC200MAX, AC300, AC500 (P090D-to-P150D cable sold separately), Apex 300 |
| USB-A | 12 W |
| Weight | 29.5 kg (65.04 lb) |
| Warranty | 3 + 1 years |
| Price | Check price |
| Capacity | 2042.8 Wh |
|---|---|
| Energy per kg | 107.5 Wh/kg |
| Cycle rating | 4000 cycles |
| Capacity | 45.6 Ah / 44.8 V (2,042.8 Wh) |
| Cycle rating | 4,000 cycles to 70%+ |
| Inputs | 2 × DC 8 mm, up to 1,400 W combined |
| Fits | Jackery Explorer 2000 Plus |
| Weight | About 41.9 lb (19 kg) |
| Warranty | 3 + 2 years |
| Price | Check price |
Best for: Adds 2 kWh to DELTA 2, DELTA Max or DELTA 2 Max
| Capacity | 2048 Wh |
|---|---|
| Energy per kg | 107.8 Wh/kg |
| Cycle rating | 3000 cycles |
| Capacity | 2,048 Wh |
| Chemistry | LFP |
| Cycle rating | 3,000 cycles to >80% |
| Fits | DELTA 2 (one pack), DELTA Max and DELTA 2 Max (up to two) |
| Weight | 19 kg (42 lb) |
| Dimensions | 464 × 235 × 283 mm |
| Price | Check price |
| Capacity | 2048 Wh |
|---|---|
| Energy per kg | 93.9 Wh/kg |
| Cycle rating | 3500 cycles |
| Capacity | 2,048 Wh (51.2 V, 40 Ah) |
| Chemistry | LiFePO4 |
| Cycle rating | 3,500+ to 80% |
| Fits | AC200MAX, AC200L; AC200P, EB150, EB240 via D050S |
| USB-C | 100 W |
| Weight | 21.8 kg (48 lb) |
| Warranty | 4 years |
| Price | Check price |
Best for: A clip-on pack that doubles as a 140 W USB-C power bank
| Capacity | 572 Wh |
|---|---|
| Energy per kg | 98.5 Wh/kg |
| Cycle rating | 3000 cycles |
| Capacity | 572 Wh (the smaller Extra Battery 300 is 286 Wh) |
| Chemistry | LiFePO4 |
| Cycle rating | 3,000 cycles to 80% |
| USB-C | 140 W in/out |
| Fits | RIVER 3 Plus (Pogo-pin clip-on) |
| Weight | 12.8 lb |
| Warranty | 5 years |
| Price | Check price |
Expansion packs are brand- and model-specific. Check the maker's compatibility list before buying, and note any extra cables it requires.
An extra battery is cheaper per kWh and shares the station's inverter, so it adds runtime but not output watts.
Makers rate packs to 70% or 80% of original capacity. A 4,000-cycle rating to 70% is not directly comparable with 3,000 cycles to 80%.
Score = weighted average of normalised specs, out of 10. Full method
No. Expansion ports and battery management are proprietary; use only packs the maker lists for your station.
Mostly through the station. Exceptions in this list: the Jackery Battery Pack 2000 Plus has its own DC inputs; the EcoFlow RIVER 3 Plus pack has 140 W USB-C in/out; the DELTA 2 Max pack can be charged by an EcoFlow Smart Generator.