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Solar system for an office with overnight backup power
A solar system sized for an office that carries lights, Wi-Fi and computers through a full night's power cut. Built around the Felicity MJS IVBM10048P1G1, with FLB48314TG1 and 16 × GK-1-72HTBD-580M.
That's a 10 kW inverter, 14.4 kWh of battery storage and 16 panels working together.
How we sized it
This system is built to handle 9.2 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 10 kW inverter carries comfortable headroom above that peak.
Day to day, that's about 40.4 kWh of use — the number the Felicity MJS bundle above is built to cover.
We set aside about 13.5 kWh for that window; the FLB48314TG1 we've picked gives you 14.4 kWh installed, so the essentials keep running through the cut.
The array works out to 8.9 kWp — 16 panels of the GK-1-72HTBD-580M across roughly 42 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?
A working office, three ACs and four computers through the day. It's sized to handle up to 9.2 kW at once — enough for whichever appliance switches on hardest.
How long does the backup last?
It's sized to set aside about 13.5 kWh for that window — about 8 hours at this home's average rate of use.
How many solar panels does it need?
16 panels, about 8.9 kWp, filling roughly 42 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 9.2 kW / 8.9 kWp baseline.