BLUETTI collection / Expansion & charging / B500K for Apex 300
Manufacturer imagery from the supplied catalog. Bundle photographs may show separately purchased equipment.
Large expansion battery · US offer
B500K for Apex 300
One expansion module; Apex 300 offer
Confirm exact host compatibility, included cables, price and dispatch date with BLUETTI.
Why this component
Large expansion battery.
B500K adds 5,120Wh of rated storage per module. The Apex 300 offer is aimed at shoppers building a larger reserve, where the battery, host, cables and placement need to be planned as a system rather than bought as unrelated boxes.
What to check before buying
An Apex 300 plus one B500K totals 7,884.8Wh by nameplate arithmetic. Using the same illustrative 80% AC planning allowance gives about 6,307.8Wh. This is not permission to run a whole house or a guarantee of a particular outage duration; the host’s output and your load list remain decisive.
Connections & compatibility
Check compatible equipment and cables
| Part of the plan | What to verify |
|---|---|
| Apex 300 | Match the selected battery kit and cable to the host manual |
| Other host station | Use its dedicated configuration and required cables/adapters |
| Accessory photos | A Charger 2, DC hub or trolley shown in a bundle image is not automatically included |
| System capability | Storage, inverter output and charging input are separate specifications |
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 | 5,120Wh / 5.12kWh |
|---|---|
| Selected offer | B500K for Apex 300 |
| Other host families listed | AC300, AC500, AC200L and AC200MAX; verify the required kit |
| Listed box contents | Battery pack, CA90 expansion cable and documents |
| Physical setup | Manufacturer offers wall/trolley arrangements; confirm accessories and installation requirements |
Read this before ordering.
Do not apply a marketed 100kWh ecosystem maximum to one Apex 300 or one module. Large totals require specific multi-component configurations. Confirm the host’s supported battery count, cable arrangement and software requirements before ordering.
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 page uses the manufacturer’s exact Apex 300 battery offer and its listed box contents. No independent exact-kit bench test or longevity result is asserted. The capacity comparison helps size a reserve without presenting a module as a standalone AC station.
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
Can I use the Apex 300 battery kit unchanged with another BLUETTI station?
Do not assume so. BLUETTI presents host-specific offers. The battery family may be supported while the required cable, adapter or allowed configuration differs. Confirm the exact host before purchase.
Compare related equipment
B300K when a smaller expansion increment fits →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 ↗