Batteries

Bluetti B300K2 Expansion Battery Module | 2,764.8Wh LiFePO4 | AC200L, AC200MAX, AC300, AC500, Apex300 Compatible | 3+1 Year Warranty

$ 1,099USD · price may vary

Model: P-B300K2-UN-GY-BL-ID-010
Specifications: 0

Overview

Power Expansion, Smarter & Stronger

The Bluetti B300K2 gives you dependable backup power when you need it most—whether you're upgrading your home energy storage or planning for total off-grid independence. With flexible compatibility and rugged build quality, it’s a future-proof solution for growing power demands.

Key Features & Benefits:

2,764.8Wh LiFePO4 Battery: Reliable energy storage with over 4,000 life cycles to 80%—built to last.

Modular Power Expansion: Works with AC200L, AC200MAX, Apex300, AC300*, and AC500* systems.

Cable Compatibility Notes:

Works with Apex300 using CA90 cable (included).

To connect with AC300, use P090A Cable (SKU: A-CBC-D6D24-UN-L80-0396) – sold separately.

To connect with AC500, use P090D to P150D Cable (SKU: A-PTC-NO-UN-P090D-P150D) – sold separately.

Expandable Capacity: Chain multiple B300K2 units or mix with B230, B300, B300S models for up to 33,168Wh with AC500.

USB-A Output Port: Use as a standalone power source to keep essentials like phones and fans running during any situation.

Automotive-Grade Build: Square LiFePO₄ cells, advanced AI-BMS, aluminum housing, and cooling fan ensure performance and protection.

Fast Charging: Recharge to 80% in just 45 minutes when paired with AC300/AC500 (with required cables).

DIY-Friendly Setup: Modular design with clear cable options makes expansion easy and affordable.

What these specifications mean

Detailed specifications for Bluetti B300K2 Expansion Battery Module | 2,764.8Wh LiFePO4 | AC200L, AC200MAX, AC300, AC500, Apex300 Compatible | 3+1 Year Warranty have not been published yet. Bluetti lists this battery in the Batteries, and we add fields as the manufacturer releases them — in the meantime, ask your distributor for the datasheet before ordering.

For a battery, the figures that matter most are communication protocol (CAN or RS485) for talking to the inverter, nominal capacity in ampere-hours (Ah) or kilowatt-hours (kWh), usable capacity after depth of discharge — LiFePO4 typically allows 80–100%, lead-acid closer to 50% and system voltage: 12 V, 24 V and 48 V for low-voltage packs, or a high-voltage stack. Storage is what turns a solar array from a daytime bill-reducer into a system that covers evening loads and rides through outages. It is normally the single most expensive component, so sizing it correctly matters more than with any other part.

What to check before ordering

The checks below apply to any battery. Run them against the specification table above — most disappointing solar purchases are compatible-on-paper units that fail one of these in practice.

Read the warranty in full: lithium warranties are stated as a term plus either a cycle count or a total energy throughput, and whichever limit arrives first ends the cover.
Leave room to expand. Packs that parallel cleanly let you add capacity later; ones that do not force a full replacement.
Compare usable kilowatt-hours, not nameplate capacity. A 100 Ah lead-acid battery at 12 V is nominally 1.2 kWh but only about 0.6 kWh is safely usable, while a 100 Ah LiFePO4 pack gives you roughly 1.0–1.2 kWh.
Size from your evening consumption. Add up what actually runs after sunset for the hours you want covered, then divide by the usable capacity per unit — that number, not the array size, sets how many batteries you need.

Common mistakes

Sizing the bank for total daily consumption rather than after-dark consumption, which typically doubles the cost for no benefit.
Installing lithium packs in an unventilated, hot enclosure. Sustained high temperature is the fastest way to lose cycle life.
Ignoring the charge current limit and pairing a large array with a small bank, which trips protection and shortens life.

Price and availability in United Arab Emirates

Bluetti B300K2 Expansion Battery Module | 2,764.8Wh LiFePO4 | AC200L, AC200MAX, AC300, AC500, Apex300 Compatible | 3+1 Year Warranty is listed at $ 1,099 (USD) for United Arab Emirates. Solar pricing moves with supply, import duties and exchange rates, and distributors set their own margins, so treat this as a comparison reference and confirm the current figure before you order.

SolarBazaar compares equipment rather than selling it. Shortlist here on specification and price, then buy from an authorised distributor or installer in United Arab Emirates: warranty cover on solar hardware is normally honoured through the channel you bought from, so confirm who supports Bluetti locally before ordering.

Bluetti B300K2 Expansion Battery Module | 2,764.8Wh LiFePO4 | AC200L, AC200MAX, AC300, AC500, Apex300 Compatible | 3+1 Year Warranty — frequently asked questions

How much does Bluetti B300K2 Expansion Battery Module | 2,764.8Wh LiFePO4 | AC200L, AC200MAX, AC300, AC500, Apex300 Compatible | 3+1 Year Warranty cost?

Bluetti B300K2 Expansion Battery Module | 2,764.8Wh LiFePO4 | AC200L, AC200MAX, AC300, AC500, Apex300 Compatible | 3+1 Year Warranty is listed at $ 1,099 (USD) for United Arab Emirates. The figure is indicative — solar prices move with supply, duties and exchange rates, and each distributor sets its own margin — so confirm the current price with a supplier before ordering.

Who makes Bluetti B300K2 Expansion Battery Module | 2,764.8Wh LiFePO4 | AC200L, AC200MAX, AC300, AC500, Apex300 Compatible | 3+1 Year Warranty?

Bluetti B300K2 Expansion Battery Module | 2,764.8Wh LiFePO4 | AC200L, AC200MAX, AC300, AC500, Apex300 Compatible | 3+1 Year Warranty is a Bluetti product, listed under batteries with model reference P-B300K2-UN-GY-BL-ID-010. The Bluetti brand page lists the rest of its range so you can compare across the catalogue.

Is Bluetti B300K2 Expansion Battery Module | 2,764.8Wh LiFePO4 | AC200L, AC200MAX, AC300, AC500, Apex300 Compatible | 3+1 Year Warranty right for my system?

That depends on what it has to connect to. For a battery, check system voltage: 12 V, 24 V and 48 V for low-voltage packs, or a high-voltage stack, continuous charge and discharge current, which limits how much power you can draw from the pack and cycle life at a stated depth of discharge, commonly 3,000–6,000 cycles for LiFePO4 against the rest of your equipment before price enters the decision. Leave room to expand. Packs that parallel cleanly let you add capacity later; ones that do not force a full replacement.

Where can I buy Bluetti B300K2 Expansion Battery Module | 2,764.8Wh LiFePO4 | AC200L, AC200MAX, AC300, AC500, Apex300 Compatible | 3+1 Year Warranty in United Arab Emirates?

SolarBazaar lists and compares equipment rather than selling it. Use the specifications and price here to shortlist, then buy through an authorised distributor or installer in United Arab Emirates — buying in-channel is what keeps the manufacturer's warranty valid.

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