Capacity and Output
- Battery capacity in watt-hours
- Continuous AC output in watts
- Surge or startup capability
- Usable-capacity information
- Ability to expand with additional batteries
Charging
- Wall recharge time under stated conditions
- Maximum solar input wattage
- Accepted solar voltage and current range
- Connector compatibility
- Vehicle-charging options
Ownership
- Battery chemistry and published cycle-life conditions
- Warranty length and exclusions
- Return policy and shipping costs
- Replacement-part and battery availability
- Customer-support contact methods
- Weight, handles, wheels, and storage needs
Evidence and Fit
- Manufacturer documentation supports the claims
- The outlets match your equipment
- Noise and fan behavior suit the location
- The system has appropriate safety certifications
- The price is evaluated against capability and warranty—not discount percentage alone