TBE DesignerFree toolAuthorised Victron Energy Installer
Victron system designer
Designer v1.8.6Working shown
- Built from
- Victron datasheets and manuals
- Checked against
- BS 7671:2018+A4:2026 (Amendment 4)
- Informed by
- Anonymised data from 180+ monitored installations
- Last checked
A whole Victron system for your campervan, motorhome or off-grid cabin, with every cable and fuse sized by our cable size calculator.
How it works
- Energy first. Watts × hours for every appliance, plus the MultiPlus switched on all day.
- Battery. Enough lithium for the days you want without any charging, using 90 % of its capacity.
- Solar. Sized on UK sun data for your region and the worst month you plan for, with the panels checked against the solar controller on a cold morning.
- Every circuit. Cable, fuse and lugs from the same engine as our cable calculator, built around a Lynx Distributor with a metal consumer unit and double-pole RCBOs on the 230 V side.
A design aid, not a design
Check every rating against your own parts. The 230 V side must be installed, tested and certified by a qualified electrician to BS 7671. Want it done properly? We'll fit it for you, or book a free call.