Mothy Off-Road power calculator — find out how long you can stay out
POWER CALCULATOR
How long can you stay out?
Your power source
Type
Voltage
Capacity (Ah)
Chemistry
LiFePO4 can safely discharge to 80% — we default to 50% to keep a buffer for cloudy days.
Calculated capacity: 1200 Wh
Watt/amp conversions for your devices use real resting voltage (12.8V / 25.6V / 51.2V), not the flat nominal rating — this matches how most manufacturer spec sheets measure amp draw.
Override Wh (optional)
Depth of discharge
Brand
Model
Capacity (Wh)
Your devices
DeviceWattsAmps
Hrs/dayPower type
⚡ Inputs changed — recalculate to update results
Your Mothy array options
Without any solar array
Daily load
—
Wh per day
Usable capacity
—
Wh available
Solar to go indefinite
—
W of panels
Ways to stay out even longer
How does solar stack up vs. the alternatives?
| Mothy solar | Generator | Engine idle | |
|---|---|---|---|
| Daily fuel cost | $0 | ||
| Hours needed daily | 0 hrs | ||
| Noise at camp | Silent | Loud | Engine running |
| Wear & maintenance | None | Oil, carb, fuel | Alternator strain |
| Camp reputation | Hero | That guy | Don't be that guy |
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STAY OUT LONGER
Mothy Off-Road power planner — hour-by-hour camp power simulation
POWER PLANNER
Map your camp power, hour by hour
Your trip
Camp arrival time
Days camping
Departure time
From arrival until departure, your aux battery runs unsupported by the alternator (unless you select alternator charging below). We simulate every half hour in between — including overnight stops — using typical run patterns for each device.
When do you use each device?
Devices are pulled from the calculator above, but timing is set here — change anything that doesn't match how you'd actually use it. For example, a laptop charged during sunny midday hours pulls from solar surplus instead of your battery at night.
Add devices in the Power Calculator above to set their usage timing here.
Charging source at camp
Pick how you're topping up while parked. Click any option to instantly re-run the simulation against it — useful for comparing, say, an SR240 against an SR350 to see if it keeps you off 0% overnight.
Pulled from the calculator above
The Power Planner uses your system voltage, device list, and battery / power station settings exactly as entered in the calculator above — nothing to re-enter here. Update them up there and they'll carry down automatically next time you simulate.
Current calculator inputs
Fill in the calculator above, then simulate to see what's being used.
⚡ Inputs changed — recalculate to update results
Camp duration
—
hours unsupported
Total load
—
Wh over the trip
Ending battery
—
% state of charge
Battery state of charge vs. device load
State of charge (top) and the stacked half-hour device load that's driving it (bottom) share the same timeline — hover anywhere to see both at once. 0% is a fully dead battery, 100% is fully charged; the dashed line marks your chosen depth-of-discharge floor, not the bottom of the chart. The gross charge/discharge lines show what's flowing in and out even when they partly cancel out.
State of charge
Gross charge (A)
Gross discharge (A)
DoD floor
STAY OUT LONGER
