What do you need to keep running?
Choose a starting plan. You can adjust every appliance, hour and watt value.
Already know your size? Compare compact 1kWh options or compare 2kWh home-backup options.
Free backup-power sizing tool
Tell Us What Must Keep Running. We’ll Help You Find the Right Fit.
Start with the devices you actually need during an outage. When Grid Fails checks power, startup demand, battery energy, voltage and solar before showing systems that fit the requirement.
No account required · No electrical background required
Simple process
From household need to product match
Use the common US appliance size when you know it. If you have the actual nameplate watts, those values take priority.
Choose the loads
Refrigerator, sump pump, furnace blower, well pump, Wi‑Fi, lights and other essentials.
Set outage duration
Tell us how long power may be out and whether solar charging is available.
Get screened matches
Products are shown only after the tool checks the technical requirements it knows.
Compare after sizing
See product examples only after the load is clear
We compare continuous output, motor-start surge, battery capacity, solar input, expansion capability, voltage and special operating modes so the product class follows the requirement—not the other way around.
Portable power & LiFePO4 systems
Used for lighter essential-load plans, selected RV applications and current Renogy systems we compare: PowerStation 2000, Mini 12V 300Ah LiFePO4, and the 3000W pure sine wave inverter with UPS transfer.
Check PowerStation 2000 price → · Check 12V 300Ah battery → · 3000W inverter guide · Complete Renogy backup system
Portable & expandable backup
Used across four current BLUETTI tiers: Elite 100 V2 for compact 1kWh backup, Elite 200 V2 for 2kWh-class runtime, Elite 300 for 3kWh/RV-oriented backup, and Apex 300 for higher-output expandable home systems including selected 120/240V configurations.
Elite 100 V2 guide · Check Elite 200 V2 price → · Elite 300 guide · Apex 300 guide
Common outage plans
Start with a real household need
Size first. Buy second.
Let the load decide the product.
Enter what must keep running and get the minimum technical requirements before spending money on a power station or battery system.