Energy Calculator
Plan your power needs for off-grid and emergency situations
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Total Load (Watts)
0
Daily kWh
0h
Generator Runtime
0
Gallons/Day
Power Load Calculator
| Device | Watts | Hours/Day | Wh/Day | Actions |
|---|---|---|---|---|
| Total | 0 W | - | 0 Wh |
Generator Sizing
0 W
Add 25% for motor startup surge
0 W
50% headroom for efficiency
Gallons
Estimated Runtime
0 hours
Based on your load and fuel
Fuel Needed for 24h
0 gallons
At current load
Days of Autonomy
0 days
With current fuel supply
Quick Add Common Devices
Power Equipment Inventory
No equipment added yet
Solar System Calculator
From your load calculator
Peak sun hours in your location
Cloudy day backup
Solar Panel Size Needed
0 W
Number of 100W Panels
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Battery Bank Size (12V)
0 Ah
Number of 100Ah Batteries
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Recommended Inverter Size
0 W
Solar Planning Tips
Oversizing is Good
Add 20-30% more panel capacity for cloudy days and system losses.
Battery Depth of Discharge
Lead-acid: 50% max DoD. Lithium: 80% DoD. This affects how much usable capacity you have.
Sun Hours Vary
Check NREL's PVWatts for accurate sun hours in your location. Winter has fewer hours.
Inverter Sizing
Size for peak load + 25% for surge. Pure sine wave for sensitive electronics.
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Total Fuel (Gallons)
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Days of Supply
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Oldest Fuel Date
Fuel Totals by Type
No fuel logged yet
Fuel Inventory
| Fuel Type | Quantity | Container | Date Added | Stabilized | Actions |
|---|---|---|---|---|---|
| No fuel logged yet | |||||
Fuel Storage Tips
Gasoline Shelf Life
Untreated: 3-6 months. With stabilizer: 1-2 years. Rotate stock regularly.
Diesel Lasts Longer
Diesel can last 6-12 months untreated, 2+ years with proper additives.
Propane Never Expires
Propane has indefinite shelf life. Great for long-term storage.