Disclaimer

The calculators and articles on PortablePowerCalc provide general estimates for planning purposes only.

• Estimates, not guarantees. Real-world runtime, solar output and power draw depend on your specific equipment, temperature, battery age, weather and usage. Results can differ significantly from estimates.
• Check your equipment. Always confirm device ratings, inverter limits and solar input limits (watts and voltage) in your manufacturer's documentation.
• Electrical safety. Connecting batteries, inverters or generators to a building's electrical system can be dangerous and may be regulated. Use a licensed electrician and an approved transfer switch or interlock. Never backfeed a home's wiring.
• Medical devices. If you depend on powered medical equipment, follow the device manufacturer's and your healthcare provider's guidance on backup power, and test your setup before you need it.
• Food safety. During outages, follow official food safety guidance and use a thermometer rather than relying on estimated runtimes.
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