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Solar system for a farm with evening backup power
A solar system for a farm that keeps water pumps, the fridge and the freezer running through a few hours of evening power cuts. Built around the Felicity MJS AI100-5048 ESS, with FLA24100WG2 and 3 × GK-1-72HTBD-580M.
That's a 4 kW inverter, 2.3 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.
We set aside about 1.1 kWh for that window; the FLA24100WG2 we've picked gives you 2.3 kWh installed, so the essentials keep running through the cut.
The array works out to 1.5 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?
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?
It's sized to set aside about 1.1 kWh for that window — about 4 hours at this home's average rate of use.
How many solar panels does it need?
3 panels, about 1.5 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 / 1.5 kWp baseline.