List the loads
Add running watts, startup watts, quantity, daily hours and duty cycle.
Portable backup and off-grid planning
Size the whole power plan—not one appliance at a time.
Turn a real device list into battery capacity, running-power, startup-surge and solar targets. Compare the full plan with an essential-load fallback before you compare products.
- No account
- No device-list upload
- Adjustable assumptions
- Manufacturer-neutral
One inspectable workflow
From nameplates to a purchase specification
Set the uncertainty
Keep usable capacity, conversion efficiency, reserve and solar losses visible.
Compare two plans
See every load, then remove optional demand without rebuilding the worksheet.
Safety boundary
A planning estimate, not an electrical design.
The tool does not size wiring, protective devices or grid-connected systems, and it cannot guarantee medical or life-safety equipment runtime. Verify measured loads and manufacturer limits.