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 Deye 5 kW Single-Phase Off-Grid Solar Inverter SUN-5K-OG01LP1-EU-AM2, with Deye 12.03 kWh 51.2 V Lithium Solar Battery SE-F12 — order the rest online from the Deye catalogue.
That's a 5 kW inverter, 10.8 kWh of battery storage and 3 panels working together.
What is inside
Solar panels×3
3 × 550 W solar panels · fills ~8 m² of roof
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 5 kW inverter carries comfortable headroom above that peak.
Day to day, that's about 6.7 kWh of use — the number the Deye 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 Deye 12.03 kWh 51.2 V Lithium Solar Battery SE-F12 we've picked gives you 10.8 kWh installed.
The array works out to 1.6 kWp — 3 panels across roughly 8 m² of roof, ordered from the Deye catalogue — 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.