Manufacturer product image. Review the included items below.
Manufacturer product image. Review the included items below.
BLUETTI B500K2 (Apex 300)
Expansion battery
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A 5,120 Wh LiFePO4 expansion battery.
- 5,120 Wh · Nominal battery capacity
- LFP · Battery chemistry
- 99.21 lb · Weight
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What this equipment is for
Adds capacity to the Apex 300.
What to check before buying
99.21 lb. It does not supply AC power by itself. Needs a compatible power station, sold separately. The AC300 and AC200L use the B500K1 version, which is a different model.
Specifications
Expansion battery for Apex 300SKU P-B500K2-UN-GY-ID-10
Power & capacity
- Nominal battery capacity
- 5,120 Wh
- Battery chemistry
- LFP
- Cycle life (to 80% capacity)
- 4,000+ cycles
Connections & expansion
- Compatible equipment
- Apex 300
Dimensions & operating conditions
- Dimensions (L x W x H)
- 20.47 x 12.87 x 12.15 in
- Weight
- 99.21 lb
Warranty & certifications
- Manufacturer warranty
- 4 years
Manufacturer specifications for the selected configuration. Nominal battery capacity is not a runtime estimate.
Compare equipment.
| Equipment |  B500K2Expansion battery for Apex 300View product |  BP2000 Gen 21 expansion batteryView product |
|---|---|---|
| Price | ||
| Nominal battery capacity | 5,120 Wh | 2,048 Wh |
| Weight | 99.21 lb | 15.3 kg |
| Battery chemistry | LFP | LFP |
| Cycle life (to 80% capacity) | 4,000+ cycles | 4,000 (≥80%) cycles |
| Compatible equipment | Apex 300 | C2000 Gen 2 |
| Manufacturer warranty | 4 years | 5 years |
| Dimensions — see PDP for orientation | 20.47 x 12.87 x 12.15 in | — |
Your questions.
Who is this equipment for?
Adds capacity to the Apex 300.
What should I verify before choosing?
99.21 lb. It does not supply AC power by itself. Needs a compatible power station, sold separately. The AC300 and AC200L use the B500K1 version, which is a different model.
What warranty applies?
BLUETTI lists a four-year manufacturer warranty. Warranty service is requested directly from BLUETTI, in the BLUETTI app or on its online service page.
What about delivery and returns?
Installation is separate. For a return or exchange, contact BetterPowered; it follows BLUETTI’s policies.
Which payment methods do you accept?
Pay securely by credit or debit card. Affirm and Klarna offer payment plans for eligible personal equipment purchases. Checkout shows the methods available for your order.
Can I finance my purchase?
Yes. Choose Affirm or Klarna at checkout for eligible personal equipment purchases. Review your payments and terms before accepting. For contractor-managed installation projects, ask about BetterPowered Capital. Financing is subject to eligibility and approval.
Can I place an order?
Yes. Add the equipment to your cart and complete secure checkout on the website or in the app. Review your delivery address, taxes, total and return terms before paying.