Build Your Off-Grid 48V Energy System
Start with a site like yours
Pick the closest match — it ticks the typical appliances below. Everything can be adjusted.
Choose a site type, or tick appliances yourself below.
Appliances
Select the appliances you plan on using off-grid.
Kitchen
Laundry & Utility
Heating & Water
Workshop
Living & Connectivity
Your own
Choose an inverter in the 230V section to highlight appliances it can't run.
Optional. It isn't added to your basket — it just helps us design the system around it.
Battery
Choose the size of your 48V battery bank.
Battery System
Choose the size of your 48V battery bank.
No Battery System Selected
Select a battery bank to preview details.
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Battery System
Choose the size of your 48V battery bank.
Battery Monitoring
Victron Cerbo GX MK2 — included with every off-grid system.
Battery Monitoring
Victron Cerbo GX MK2 — included with every off-grid system.
Victron Cerbo GX MK2
The Cerbo GX MK2 is the brain of the system. It talks to the batteries, MPPT solar chargers and inverter, logs everything to Victron's free VRM portal so you can check the system from your phone anywhere, and lets us diagnose and tune it remotely.
No Battery Monitoring System Selected
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Battery Monitoring
Victron Cerbo GX MK2 — included with every off-grid system.
Victron Cerbo GX MK2
The Cerbo GX MK2 is the brain of the system. It talks to the batteries, MPPT solar chargers and inverter, logs everything to Victron's free VRM portal so you can check the system from your phone anywhere, and lets us diagnose and tune it remotely.
Solar
Size a ground or roof array to keep your battery bank charged all year.
Solar System
Size a ground or roof array to keep your battery bank charged all year.
No Solar System Selected
Select an array size to preview details.
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Solar System
Size a ground or roof array to keep your battery bank charged all year.
230V
Convert 48V battery power to 230V mains and charge from a generator or the grid.
230V System
Convert 48V battery power to 230V mains and charge from a generator or the grid.
No 230V System Selected
Select an inverter to preview details.
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Select an inverter to preview details.
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230V System
Convert 48V battery power to 230V mains and charge from a generator or the grid.
Power Distribution
Auto selected — one Lynx Distributor by default; the two largest dual-MPPT solar arrays add a second.
Power Distribution
Auto selected — one Lynx Distributor by default; the two largest dual-MPPT solar arrays add a second.
One Lynx Distributor covers most builds. A solar array with two MPPT 250-series chargers adds a second automatically.
No Power Distribution System Selected
Your busbar is chosen automatically from the solar array.
No Power Distribution System Selected
Your busbar is chosen automatically from the solar array.
Power Distribution
Auto selected — one Lynx Distributor by default; the two largest dual-MPPT solar arrays add a second.
One Lynx Distributor covers most builds. A solar array with two MPPT 250-series chargers adds a second automatically.
4.9/5 • 100+ reviews“It is very satisfying knowing everything is wired correctly and most importantly safe!!” Mark Graham
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Off-Grid 48V System Builder
Powering a cabin, glamping site, shepherd hut, workshop or smallholding without a grid connection is a different job to wiring a vehicle – bigger loads, bigger battery banks, and solar arrays measured in kilowatts. This free builder specs a complete 48V off-grid system around what you actually run, and models how long it lasts at your exact location.
Pick your appliances – washing machine, immersion heater, power tools, borehole pump – and the builder sizes a Fogstar 48V battery bank, a ground- or roof-mount solar array, and a Victron or LuxPower inverter to match, with a live parts list as you go.
Honest off-grid numbers, not brochure numbers
Drop a pin on your site and the builder pulls real solar irradiance data for that spot, then simulates your system through every month of the year. A setup that runs forever in June and struggles in December will tell you so – before you buy anything, not after.
What the builder does for you
- Calculates your daily consumption in kWh from the appliances you plan to run
- Sizes a 48V battery bank (16–64kWh) that can carry your heaviest loads through the night
- Matches a solar array and MPPT charging – or an all-in-one hybrid inverter with built-in solar inputs – to the bank
- Shows month-by-month off-grid performance for your exact location, winter included
Checked by an engineer before you buy
Off-grid systems at this scale deserve a second pair of eyes, so we don't sell them straight from a basket. When your build is ready, send it to us – a Vunked engineer checks the design over, confirms the details with you, and only then do you buy. It's the same care we'd want for our own site.
Design it now, and we'll check it with you.