BLUETTI B300K expansion battery for AC500

BLUETTI B300K Expansion Battery for AC500 | 2,764.8Wh LiFePO₄ Power Module

Your AC500 just got hungry. Feed it.

The AC500 is a beast but a beast without a battery is just a very clever box. The B300K is where the energy lives: 2,764.8Wh of LiFePO₄ muscle, ready to stack, scale and keep your world running long after the grid gives up.

Stack It. Scale It. Own It.

One B300K is serious backup. Two is a home energy system. Keep going and you’re at 5kWh, 10kWh, 15kWh and beyond a wall of power that quietly handles:

• Fridges and freezers that can’t afford a day off
• AC units and heaters (paired with AC500)
• Lights, Wi-Fi, routers and everyday electronics
• Power tools and workshop gear
• Essential medical equipment
• Genuine off-grid living, day after day after day

Start with what you need today. Add more when life demands it.

Purpose-Built for the AC500

This isn’t a generic battery with an adapter and good intentions. The B300K is engineered specifically for the AC500 seamless integration, stable output, longer runtime, and full access to the AC500’s smart features. Connect it, and the system simply knows what to do.

LiFePO₄ That Outlasts the Competition

3,500+ life cycles. Superior heat tolerance. Chemistry chosen for endurance, not headlines. Charge it daily for the better part of a decade and it’ll still be showing up for work while cheaper batteries are long retired.

Let the Sun Pay Your Power Bill

Paired with the AC500, the B300K unlocks high-efficiency solar charging ideal for cabins, RVs, home solar setups and anyone tired of their electricity bill. Bank clean energy all day, run on it all night, repeat indefinitely.

Need a quick top-up away from base? Built-in output ports (varies by model) let you charge small devices without connecting to the AC500 at all.

A Bodyguard for Your Battery

An advanced Battery Management System runs quiet watch around the clock:

• Overcharge and over-discharge protection
• Real-time temperature monitoring
• Overcurrent and short-circuit protection

You focus on the adventure. It handles the arithmetic.

Built to Stack. Made to Last.

Rugged housing, effortless installation, and a stackable design that grows exactly as fast as you do. No rewiring your life. No compromises.

Perfect for: whole-home backup · RV and van life · workshops and field ops · extended camping · full solar living