BLUETTI collection / Expansion & charging / B300K for Apex 300
Manufacturer imagery from the supplied catalog. Bundle photographs may show separately purchased equipment.
Expansion battery · US offer
B300K for Apex 300
One expansion module; Apex 300 offer
Confirm exact host compatibility, included cables, price and dispatch date with BLUETTI.
Why this component
Expansion battery.
B300K adds 2,764.8Wh of rated LFP storage to a compatible system. This page follows the Apex 300 offer, so the selected station and included connection kit stay explicit rather than treating every B300K listing as the same purchase.
What to check before buying
One Apex 300 and one B300K have an arithmetic nameplate total of 5,529.6Wh: 2,764.8Wh in each unit. At an illustrative 80% usable AC allowance, that is 4,423.7Wh for planning, not a measured system result. Recharge time and remaining energy must be considered alongside the larger reserve.
Connections & compatibility
Check compatible equipment and cables
| Part of the plan | What to verify |
|---|---|
| Apex 300 selection | Confirm the selected US bundle’s CA90 cable and the station manual’s connection instructions |
| AC500 selection | Manufacturer specifies a separate P090D-to-P150D cable for this host |
| Module count | Use the exact host/manual limit rather than a portfolio-wide maximum |
| AC appliances | The compatible host provides AC conversion; this module is not a standalone AC power station |
This table identifies the checks that matter; it is not approval of a custom installation. Use the exact current model manuals and manufacturer confirmation where a connection or operating mode is unclear.
Product specifications
Key specifications
| Rated module capacity | 2,764.8Wh |
|---|---|
| Battery chemistry | LiFePO₄ / LFP |
| Selected offer | B300K for Apex 300 |
| Other host families listed | AC200L, AC200MAX, AC300 and AC500; connection requirements differ |
| Listed box contents | Battery module, CA90 connection cable and manual |
Read this before ordering.
The US page advertises 3+1 years with registration, while the warranty table lists 48 months for B300K. Confirm registration requirements and retain purchase records. Cycle-life claims describe a different measure from warranty coverage.
Check what’s included
Confirm the exact product quantity, host-specific cable or adapter, required mounting parts and warranty conditions. An ecosystem photograph or a shared brand name does not establish that every shown component comes in the selected offer.
Sources and limitations
Sources and limitations
This guide is based on BLUETTI’s B300K product and compatibility information. We have not verified an independent bench test of this exact Apex 300 bundle. The system-capacity example is arithmetic; it is not a runtime measurement or approval of an arbitrary cable arrangement.
Manufacturer & support
Contact BLUETTI customer support
BLUETTI supplies portable power stations, solar charging equipment and home energy products. Use its current US documentation to check accessories, operating limits and the configuration you select.
About BLUETTI →US customer support
+1 909-570-0909
Monday–Saturday, 6am–5pm PDT, as published by BLUETTI.
service@bluettipower.com
Current contact details · Manuals & support · Warranty terms
Before you choose
Will one B300K make my station run higher-wattage appliances?
Adding energy capacity primarily extends the reserve. It does not by itself raise the host inverter’s continuous AC rating. Check the host’s output, startup support and permitted configuration separately.
Compare related equipment
B500K for a larger module capacity →Sources & editorial notes
Checked October 26, 2026. Ratings are manufacturer claims. Any capacity or energy examples are AZSP calculations, not measured performance. Current prices, stock and final compatibility confirmation remain with the merchant.
Check Current Price & Availability ↗