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Expansion Battery · 2,765Wh
The B300K is your ultimate energy companion, providing seamless power whether you're securing your home during outages or embarking on an off-grid adventure. Its modular design allows you to stack multiple B300K batteries or combine them with B300 and B300S models for a tailored energy solution. Stay powered up wherever life takes you, with confidence and ease. *Requires P150D to P090D cable for connection with AC500.
Unlock limitless possibilities with the B300K, which integrates effortlessly with AC200L, AC200MAX, AC300, and AC500* power stations. Whether you're scaling up your home power system or prepping for outdoor adventures, this battery adapts to your growing energy needs. *P090D to P150D cable sold separately for AC500 connections.
The B300K is built to last, featuring square LiFePO₄ batteries, advanced AI-BMS technology, and a sturdy aluminum casing. Combined with cutting-edge wireless components and a high-efficiency cooling fan, this battery ensures long-term reliability and peace of mind in any scenario.
Paired with the AC300 or AC500, the B300K charges to 80% in just 45 minutes, so you can focus on what matters most without delays. Whether you're at home or on the move, quick power is always at your fingertips.
More than just an accessory, the B300K serves as a reliable power hub with a built-in USB-A port for charging devices like smartphones, tablets, or fans. Whether you're making an urgent call, sharing memories, or staying cool in your tent, the B300K ensures you're always connected and powered up wherever your journey leads.
| Model | B300K |
| Battery Capacity | 2,764.8Wh (51.2V, 54Ah) |
| Battery Type | LiFePO₄ (Lithium Iron Phosphate) |
| Life Cycles | 4,000+ (80%) |
| USB-A Port | 12W Max., 5V / 2.4A |
| Capacity | 2,764.8Wh |
| Weight | 29.5kg (65.04lbs) |
| Dimensions (L × W × H) | 52.5 × 32.7 × 20.9cm (20.67 × 12.87 × 8.23in) |
| Charging Temperature | 0°C to 40°C (32°F to 104°F) |
| Discharging Temperature | -20°C to 40°C (-4°F to 104°F) |
| Storage Temperature | Up to 1 month: -20°C to 40°C (-4°F to 104°F), Up to 6 months: -20°C to 25°C (-4°F to 77°F) |
| Working Humidity | 5% to 95%RH |
| Charging Current | 60A Max. (Current may decrease outside specified temperatures) |
| Discharging Current | 70A Max. |
| 2 × Expansion Port | 58.4VDC Max., 90A Max. |
| Warranty | 3+1 Years |
| Compatibility | AC200L, AC200MAX, AC300, AC500 |
Free shipping on all orders within the mainland US (Hawaii, Alaska and overseas territories excluded - a freight forwarder is required). Orders ship directly from our brand partners' warehouses across the U.S. Order confirmation is emailed immediately; if an item is unexpectedly backordered we notify you before your card is charged. In-stock items are processed within 1-4 business days (cut-off 4:00 PM EST), transit is 3-6 business days, and tracking is emailed within 24 hours of shipment. Typical delivery is 4-10 business days from purchase. Minimum order value is $69.
You have 30 days from the delivery date to initiate a return (35 days for orders placed Nov 25-30 and Dec 25-31). Items must be unused, in original packaging with tags attached, and returns require prior authorization from our team.
To start a return: +1 (307) 317-7213, hello@ecosolarkits.com, or live chat. Read the full return and refund policy
