BLUETTI · Batteries
BLUETTI B300S Expansion Battery (3072 Wh)
$999.99Works with
AC500 / AC300
3,072 Wh LiFePO4 expansion battery engineered for the AC500 (up to 6 units per station for 18.4 kWh). Adds cold-weather self-heating down to -20°C, 500W independent MPPT solar input, standalone DC ports, and P150D cable.
Use
What it adds
The BLUETTI B300S Expansion Battery is the dedicated 3,072 Wh LiFePO4 module engineered for the BLUETTI AC500 5,000W modular home backup system. Up to six B300S modules can connect to one AC500 for 18,432 Wh, or up to twelve across a split-phase dual-AC500 setup for 36,864 Wh.
Upgraded over the standard B300, the B300S adds an Intelligent Temperature Adaptation self-heating system for sub-freezing operation down to -20°C (-4°F) and a 500W built-in MPPT solar input for faster independent solar recharging.
Compatibility
Product details
- Brand
- BLUETTI
- Category
- Batteries
- Compatible with
- AC500 / AC300
- Weight
- 83.8 lb / 38 kg
- Dimensions
- 20.5 × 12.5 × 10.5 in (520 × 320 × 266 mm)
- Model
- B300S-US-GY-BL-LWSUS (B300S)
- Capacity
- 3,072 Wh (51.2V, 60Ah)
- Cell chemistry
- LiFePO4 (LFP) with cold-weather self-heating
- Cycle life
- 3,500+ cycles to 80% capacity
- Built-in MPPT solar input
- 500W Max (12V–60V DC, 10A Max)
- Standalone DC outputs
- 1 × USB-C (100W), 1 × USB-A (18W), 1 × 12V/10A Car Port
- Charge temperature
- 0°C to 40°C (32°F to 104°F)
- Discharge temperature
- -20°C to 40°C (-4°F to 104°F)
In action
Reference setups & real-world use
AC500 Garage & Cold-Climate Backup Stack
Purpose-built BLUETTI B300S (3,072 Wh) modules stacked beneath the BLUETTI AC500 via P150D cables with self-heating LFP cells rated down to -20°C (-4°F).
500W Independent Solar MPPT & Cabin Power
B300S recharges directly from up to 500W of solar input via its built-in MPPT controller while feeding AC500 home backup circuits.
Highlights
Why it's worth it
- 3,072 Wh LiFePO4 expansion module purpose-built for the BLUETTI AC500 (stack up to 6 units per AC500 for 18.4 kWh)
- Intelligent Temperature Adaptation self-heating warms cells automatically in freezing environments down to -20°C (-4°F)
- Upgraded 500W built-in MPPT solar input (12V–60V DC, 10A) for rapid standalone solar charging
- Standalone DC outputs: 100W USB-C PD, 18W QC3.0 USB-A, and 12V/10A regulated car outlet
- 3,500+ cycle LFP battery chemistry with AI-BMS protection and P150D expansion cable included
In the box
What's included
- BLUETTI B300S Expansion Battery (3,072 Wh)
- P150D Battery Expansion Cable
- Solar Charging Cable (MC4 to XT90)
- User Manual
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