Tool
AC300 + B300KVSAC500 + B300S
Compare specs, verdicts, and use-case scores side by side.
Quick Take
Same modular Bluetti family — AC500’s higher surge/output vs AC300 entry; both are 120V on a single inverter head.
Best for Camping, Home Backup, CPAP, Remote Work / Starlink, and Van Life / RV: AC500 + B300S
Camping→AC500 + B300SHome Backup→AC500 + B300SCPAP→AC500 + B300S+2 more
| Spec | AC300 + B300K | AC500 + B300S |
|---|---|---|
| Capacity | 2.8kWh | 3.1kWh✓ |
| AC Output | 3kW | 5kW✓ |
| Surge Power | 6kW | 10kW✓ |
| Weight | 113 lbs✓ | 150 lbs |
| Solar Input | 2.4kW | 3kW✓ |
| AC Charge | 3kW | 4.5kW✓ |
Keep in mind
Verdicts are based on manufacturer-published specs. Real-world performance varies with temperature, battery age, and load type. Use this as a starting point, not a final verdict.