DEVICE 1
Source: Portable Power Match planning methodologyCurated editable planning estimate using a 50% cycling duty cycle. The 300 W startup value is a conservative 3× compressor-start allowance; verify the appliance nameplate.
Sizing calculator
How much backup power do you need?
Choose your devices, a backup window, and what you are planning for. Advanced electrical controls are optional.
POWER NEEDS
Example planning values — edit them to match your actual devices.
DEVICE 2
Source: U.S. Department of Energy appliance tableThe 150 W startup value is a conservative motor-start planning allowance; verify the fan label.
DEVICE 3
Source: ENERGY STAR certified light-fixture listingExample certified LED fixture value; edit this to match the wattage printed on each lamp.
DEVICE 4
Source: Apple 20W USB-C Power Adapter specificationsUses a maximum adapter output as a conservative planning value; actual charging draw usually varies over the charge cycle.
DEVICE 5
Source: U.S. Department of Energy-hosted plug-load studyRounded planning value based on a measured 57.5 W laptop example; use the charger label or a watt meter for your device.
LOAD SUMMARY
- Devices selected
- 6
- Estimated energy
- 1,075 Wh
- After conversion losses
- 1,265 Wh
- Recommended rated capacity
- ~1,489 Wh+
- Maximum simultaneous load
- 249 W
- Startup / surge requirement
- 449 W
Energy uses each row’s runtime, quantity, and duty cycle. Output sums checked devices; unchecked devices are treated as one-at-a-time loads. Startup replaces that device’s running draw during its start event.
YOUR ESTIMATED NEED
Battery size
~1.5 kWh+
Power output
~249 W+
Startup capability
~449 W
See calculation details
- Device energy
- 1,075 Wh
- After 85% conversion efficiency
- 1,265 Wh
- After separate 15% reserve
- 1,489 Wh
RECOMMENDED MATCHES
How scoring works1
Jackery Explorer 1500 V2
1,536 Wh · 2,000 W · 31.97 lb
Match Score 79 / 100
Why this matches
- Meets your 249 W continuous running requirement.
- Battery capacity is closely sized to your requested runtime.
- Its surge rating covers your estimated 449 W startup requirement.
- Weighs 31.97 lb for transport.
Trade-off: Its battery capacity cannot be expanded later.
Score breakdown
Capacity Fit 100Output Fit 60Use-case Fit 54Portability 66Feature Fit 83
Check price at manufacturer · Jackery USExact product listing at Jackery US — availability may change
Search AmazonSearch results — exact listing not verified
2
Anker SOLIX S2000
2,010 Wh · 1,500 W · 35.7 lb
Match Score 76 / 100
Why this matches
- Meets your 249 W continuous running requirement.
- Battery capacity is closely sized to your requested runtime.
- Its surge rating covers your estimated 449 W startup requirement.
- Weighs 35.7 lb for transport.
Trade-off: Its battery capacity cannot be expanded later.
Score breakdown
Capacity Fit 97Output Fit 60Use-case Fit 50Portability 59Feature Fit 83
Check price at manufacturer · Anker SOLIX USExact product listing at Anker SOLIX US — availability may change
Check Price on Amazon.comExact product listing at Amazon US — availability may change
3
Anker SOLIX C2000 Gen 2
2,048 Wh · 2,400 W · 41.7 lb
Match Score 76 / 100
Why this matches
- Meets your 249 W continuous running requirement.
- Battery capacity is closely sized to your requested runtime.
- Its surge rating covers your estimated 449 W startup requirement.
- Weighs 41.7 lb for transport.
Trade-off: It weighs 41.7 lb, so lighter eligible options may be easier to move.
Score breakdown
Capacity Fit 96Output Fit 60Use-case Fit 62Portability 47Feature Fit 83
Check price at manufacturer · Anker SOLIX USExact product listing at Anker SOLIX US — availability may change
Check Price on Amazon.comExact product listing at Amazon US — availability may change