Off Grid Living WisdomFree tools
Off-Grid and Power Outage Calculators
Free off-grid and power outage calculators for the questions people get wrong most often: what size generator to buy, how many solar panels and batteries you need, how much firewood to stack, and how to make water safe to drink.
Generator Size Calculator
What size generator do I need? Tick your appliances and get running and starting watts.
Solar Panel & Battery Calculator
How many panels, how much battery and which charge controller for your daily use.
Firewood Calculator
How many cords of wood you need for winter, and what you'd save.
Bleach & Water Calculator
How much bleach to purify water, and how much water to store.
The Off-Grid Home Energy Manual
Buyers of the manual get 3 more: generator fuel, power station run time and heating cost.
105 pages, 7 calculators, a fill-in family plan and checklists. $47, instant download.