POWER CALCULATOR
How Big a Portable Power Station Do You Actually Need?
Add your devices and get a capacity target that includes trip length, conversion losses, and reserve.
Field intelligence for life beyond the outlet
Take the right tech off-grid.
Clear, calculation-first guides to portable power, solar charging, navigation, and satellite communication—built around what works in the field.
FIELD SYSTEM / 01
200Wsolar input
1,024Whstored energy
The numbers matter. Our guides show the assumptions behind them.
START HERE
Build a dependable field kit
THE DIGITIERRA METHOD
Plan for the variables the box doesn’t mention.
Rated capacity is only a starting point. We translate specifications into usable power, charge time, pack weight, and backup options.
01
Count the load
List device watts and actual hours of use.
02
Apply real losses
Include inverter draw, heat, and conversion.
03
Model bad conditions
Short sun, cold batteries, and cloudy days.
04
Build redundancy
Keep navigation and emergency comms independent.
FIELD NOTES
01020304
LiFePO₄ vs. NMC batteries
Chemistry, cycle life, cold weather, and weight
Solar panels: series or parallel?
A practical wiring guide for portable systems
Build an offline navigation backup
Phone, handheld GPS, paper map, and power redundancy
12V fridge duty-cycle calculator
Model compressor runtime, daily energy, and battery capacity
A SMALLER, SMARTER KIT