Essential-load backup power system
Essential-Load Backup Power Worksheet
Inventory only the devices that must run, verify their labels or manuals, estimate daily energy, and document the safety limits before comparing a battery, generator, or solar setup.
1. Calculate
Use household-specific inputs.
2. Verify
Check labels, manuals, and local guidance.
3. Practice
Confirm the plan works before an outage.
Step 1
Define the outage and non-negotiable loads
Write the household outcome first
Step 2
Build the load inventory from labels and manuals
For each device, daily energy is running watts × hours used per day. Record starting or surge watts separately when a motor, compressor, or pump has them. Do not substitute a generic online estimate when the device label or manual is available.
| Device and priority | Running W | Starting W | Hours / day | Wh / day | Source checked |
|---|---|---|---|---|---|
| Simultaneous running total | Highest starting case | Daily energy total |
Step 3
Document the adjustments and weakest condition
Step 4
Choose and verify a safe backup path
| Path | Capacity / output checked | Connection and location | Fuel / recharge plan | Manual and safety limit |
|---|---|---|---|---|
| Battery power station | ||||
| Portable generator | ||||
| Solar recharge | ||||
| Grid / vehicle fallback |
Carbon-monoxide boundary: Never run a generator in a home, garage, or partially
enclosed space. Follow the current manual and public-safety guidance for outdoor placement, weather
protection, grounding, transfer equipment, refueling, and storage. Do not backfeed household wiring.
Next action
Verify the numbers behind this plan.
Methodology reviewed July 26, 2026.