Inverter×1
Build my system
Off-grid solar system for a farm
A complete off-grid solar system for a farm — no grid connection needed, sized to keep the pumps, fridge and freezer running day and night. Built around the Felicity MJS AI100-5048 ESS, with FLB48230WG1-H and 3 × GK-1-72HTBD-580M.
That's a 4 kW inverter, 10.5 kWh of battery storage and 3 panels working together.
How we sized it
This system is built to handle 3.9 kW at once. Appliances like compressors and pumps briefly draw far more than their running power the moment they switch on — so we size for that peak moment, not just the average, which is what keeps the inverter from tripping when a few things start up together. And the 4 kW inverter carries comfortable headroom above that peak.
Day to day, that's about 6.7 kWh of use — the number the Felicity MJS bundle above is built to cover.
With no grid to lean on at all, that day (plus a cloudy-day reserve) needs about 6.7 kWh; the FLB48230WG1-H we've picked gives you 10.5 kWh installed.
The array works out to 1.6 kWp — 3 panels of the GK-1-72HTBD-580M across roughly 8 m² of roof — assuming the strong, fairly steady sunshine typical of our main markets (about 5.7 peak sun hours a day). Your own roof may do a little better or worse depending on shading and the season.
Frequently asked questions
What can this system power?
Off-grid farm basics: two water pumps, a fridge and a freezer. It's sized to handle up to 3.9 kW at once — enough for whichever appliance switches on hardest.
How long does the backup last?
This system is sized to store about 6.7 kWh — a full day of use plus a cloudy-day reserve — because there's no grid to fall back on.
How many solar panels does it need?
3 panels, about 1.6 kWp, filling roughly 8 m² of roof.
Can I expand this system later?
Yes — inverters, batteries and panel arrays in this range are modular, so you can add more battery modules or extra panels later, starting from this 3.9 kW / 1.6 kWp baseline.