POWER BASICS
How Big a Portable Power Station Do You Actually Need?
A watt-hour method that starts with your devices—not a manufacturer’s lifestyle photo.
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
USB-C PD without the guesswork
Match chargers, cables, and devices correctly
A SMALLER, SMARTER KIT