Worked examples

Use cases

Real sizing examples for the most common off-grid and backup scenarios. Each opens the calculator in one click, pre-loaded with that setup's typical appliances — then adjust it for your own gear.

Off-grid cabin

A weekend or full-time cabin running lights, a fridge, charging and a water pump on solar …

Camper van / RV

A van build powering a 12V fridge, lights, fans, charging and occasional inverter loads, r…

Whole-home backup

Backup for essential circuits during outages — fridge, freezer, lights, internet and…

Tiny home

A full-time tiny home on solar with a fridge, lighting, laptop work, induction cooking and…

Shed / workshop

An off-grid workshop running lights, a few power tools intermittently, and charging, away …

Fridge-only backup

The simplest case — keeping a single fridge running through outages, the most common…

How these examples work

Each use case pre-loads a realistic device list and typical conditions into the system calculator so you see a complete bill of system — battery bank, solar array, charge controller and inverter — for that scenario in one click, instead of starting from a blank form. The starting device list is a reasonable baseline, not a prescription: add, remove or resize any device to match your actual gear before treating the numbers as a plan.

If your situation doesn't match one of these six closely, the calculator itself starts from a blank device list, and the run-time pages and individual tool pages cover narrower questions — how long a specific battery size runs a specific appliance, or a single calculation like array sizing or C-rate — without the full system walkthrough.