Free Solar and Battery Tools
Planning a system for your van, boat, bach or off grid home? These free tools help you get the numbers right before you spend a cent. They're the same ones we use when we size systems for customers.
Battery Size Calculator
Work out what size lithium battery you need for your RV, boat, home or off grid setup. Add what you run and for how long, and get a capacity to suit.
Size my batteryVoltage Drop & Cable Size Calculator
Find the right cable size for any 12V, 24V or 48V DC run, and see how much voltage you'll lose. Stops the most common cause of a system underperforming.
Check my cableWire Selection Chart (PDF)
A printable chart of DC cable sizes by current and length. Handy to keep in the van or the workshop.
Download the chartTalk to us
Not sure where to start, or want a second opinion on your numbers? Send us your calculator results or give us a call on 022 502 2377 and we'll help you pick the right gear.