Couldn't load pickup availability
BLUETTI B500K · Universal Expansion Battery · 5,120Wh
The B500K is a 5,120Wh LiFePO₄ expansion battery built for universal compatibility — Apex 300, AC300, AC500, AC200L, AC200MAX, and upcoming models all work with it, rather than being locked to one specific system. Rated for over 4,000 cycles (roughly a decade of use), it scales up to 100kWh combined, mounts to a wall or rack, and pairs with BLUETTI's SolarX 4K and Hub D1 accessories for a more connected setup.
BLUETTI's own "Universal Compatibility" positioning — one battery, multiple power station platforms.
Portable
Extends the Apex 300 platform's already-modular capacity further.
Commercial
Whole-home and small commercial backup platforms with real expansion headroom.
RV / Home
Popular mid-size power stations, plus BLUETTI's stated support for upcoming models too.
Substantial capacity added to whatever BLUETTI power station it's paired with.
Works with Apex 300, AC300, AC500, AC200L, AC200MAX, and BLUETTI's stated upcoming models.
Rated for over a decade of service, not just occasional emergency use.
A third-gen internal design built to be more resilient to real-world knocks and shocks.
Mount to save space, or pair with the separately-sold Foldable Trolley 2 for a mobile setup.
Keeps performance stable even under challenging operating conditions.
Combine multiple units for partial, whole-home, or small business backup.
Pairs with SolarX 4K and Hub D1 for a more integrated setup beyond just extra storage.
Most BLUETTI expansion batteries are built for a specific platform — B300K for Apex 300, B4810 for RV5-based 48V systems, B500 exclusively for EP800/EP900 home ESS. The B500K takes a different approach: BLUETTI markets it with "Universal Compatibility," working across Apex 300, AC300, AC500, AC200L, AC200MAX, and models still to come. That flexibility matters if a system might change platforms later, or if the same battery needs to serve more than one type of power station over time.
Physically, it's built to be moved or fixed in place depending on the setup — mount it to a wall or rack for a permanent install, or pair it with the separately-sold Foldable Trolley 2 for something more portable. A third-generation "wireless internal" design and dedicated cooling fan are meant to hold up to real-world knocks and challenging conditions better than earlier designs, and it connects into BLUETTI's broader ecosystem through accessories like SolarX 4K and Hub D1. Warranty coverage requires registering the product after purchase — BLUETTI's own FAQ confirms this step, though the base coverage length itself wasn't stated.
B500K Expansion Battery
| Total energy | 5,120 Wh |
| Chemistry | LiFePO₄ |
| Cycle life | 4,000+ cycles |
| Estimated lifespan | ~10 years |
| Internal design | 3rd-gen "wireless" frame |
| Cooling | Dedicated fan |
| Mounting | Wall/rack, or Foldable Trolley 2* |
| Compatible power stations | Apex 300, AC300, AC500, AC200L, AC200MAX, upcoming models |
| Ecosystem accessories | SolarX 4K, Hub D1 |
| Max combined capacity | 100kWh |
| Warranty | Registration required to claim** |
*Foldable Trolley 2 sold separately. **BLUETTI's own FAQ confirms a registration step is required to claim warranty, but doesn't state the base coverage length — the live page's Tech Specs tab was not accessible in a static fetch, so weight, dimensions, and exact charge/discharge current aren't included here rather than guessed.
Register the product on BLUETTI's website after receiving it — this is confirmed directly in BLUETTI's own FAQ as the required first step to claim warranty coverage.
Apex 300, AC300, AC500, AC200L, AC200MAX, and BLUETTI's stated upcoming models — marketed as "Universal BLUETTI Compatibility" rather than being locked to one platform.
Not confirmed in available sources — this varies by which power station it's paired with, and BLUETTI's own FAQ raises this exact question for AC300 and Apex 300 specifically without a visible published answer. Worth confirming the exact number for your specific setup directly with BLUETTI before purchase.
Not confirmed — BLUETTI's own FAQ asks this exact question (mixing B500K with B300K, B300, or B300S) without a visible published answer. Don't assume compatibility for mixed setups without checking directly.
Up to 100kWh combined, per BLUETTI's own stated maximum — enough for partial, whole-home, or small business backup depending on how many units are connected.
Yes — wall or rack mounting is standard, and it can also attach to BLUETTI's Foldable Trolley 2 (sold separately) for a more portable setup.
Upon completing your order, you will promptly receive an email confirming the order placement, indicating that we have received your order and pre-authorized your credit card for the purchase. Our next step is to contact our suppliers to confirm the item's availability and readiness for shipment. Should the item be on backorder or unavailable, we will notify you of the estimated lead time. If the provided lead time is unsatisfactory, we will cancel the pre-authorization and contact you via email or phone. If the item can be shipped within 5 business days, we will proceed with processing the charges and shipping your order.
In the event of incorrect shipping information provided at checkout, we will make every effort to track down the item using our shipping partners. Please be aware that refunds and returns are not available in such cases. However, we will do our utmost to locate the item. If successful, re-shipping fees of up to 20% of the item's value may apply.
If your order is in stock and we have successfully processed your credit card charges, the items will be shipped within five business days from the order date. You will receive tracking information via email within 24 hours of your order leaving the distribution center. Should tracking information not be received within six days of your order, please contact us at +1 (307) 317-7213. The cut off time is 4 pm EST.
We offer free shipping on all orders and applicable items and brands within the mainland of the US (Hawaii, Alaska, and Overseas Territories are exclusions).
Eco Solar Kits does not ship orders directly to Hawaii, Alaska, or Overseas Territories. Clients needing delivery to these locations must arrange a freight forwarder and enter the forwarder’s address as the shipping address. Eco Solar Kits will then ship the order to the designated freight forwarder under our standard shipping terms.
Typically, orders are processed immediately upon receipt, taking approximately 1-4 business days after order confirmation, payment, and pick-up time to fulfill.
The delivery time via freight carrier may vary between 4-6 business days, depending on your location.
To prevent delays, frustration, and additional costs, kindly inform us of any concerns regarding the delivery to your location. It's important to note that the following situations may incur additional costs:
You can reach us using the contact methods provided below:
At D&D Eco Power Goods LLC, we strive to ensure our customers are completely satisfied with their purchases. Our return and refund policies are designed to provide a fair and transparent process based on the delivery date of your item.
You have 30 days from the delivery date to initiate a return. To be eligible for a return, the item must meet the following conditions:
Items that do not meet these conditions will not be accepted for return.
To begin the return process, please follow these steps:
We prioritize customer satisfaction and aim to provide a seamless refund experience. This refund policy is based on the delivery date of your item to ensure fairness in the return process.
Refunds will be processed based on the delivery date of the returned product. Once the manufacturer receives and inspects your returned item, we will notify you regarding the approval or rejection of your refund. If approved, the refund will be processed through your original payment method, typically within 10 days. Please note that it may take some time for your bank or credit card company to process and post the refund.
For any questions or concerns regarding our return or refund policy, please do not hesitate to contact us:
