12V Install Tools & Testers
The crimpers, multimeters, fuses and cable you need to do your own 12V install safely and neatly.
Calculators & Checks
Daily Energy Use & Battery Size Calculator
Add up what you run each day and estimate the battery capacity you need in Wh and Ah.
Open calculator →Solar & Charging Check
Compare your daily solar and DC-DC charging with your daily use, and estimate the solar needed to balance it.
Open calculator →Check My System
Answer a few questions about your existing 12V gear and get a checklist of what to confirm and which guides will help.
Start the check →Charger & Inverter Sizing Calculator
Size an inverter for your AC appliances, including start-up surge, and the charger current needed to refill your battery.
Open calculator →Guides
First 12V Install Tool Kit for Beginners
The essential tools to do your first 12V install right, from crimpers and multimeters to heat shrink and fuses.
Read guide →
12V Cable and Fuse Size Guide: How to Work It Out
A simple method for choosing 12V cable and fuse sizes for your own setup, with a worked example.
Read guide →Gear picks
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