Build my system
10 kW off-grid solar system for an office
A complete off-grid solar system for an office — no grid connection, sized to run a full working day on its own. Built around the Deye 10 kW Single-Phase Hybrid Solar Inverter SUN-10K-SG05LP1-EU-SM2-P, with 3 × Deye 16 kWh 51.2 V Lithium Solar Battery RW-F16 — order the rest online from the Deye catalogue.
That's a 10 kW inverter, 43.2 kWh of battery storage and 18 panels working together.
What is inside
Solar panels×18
18 × 550 W solar panels · fills ~47 m² of roof
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 Deye bundle above is built to cover.
With no grid to lean on at all, that day (plus a cloudy-day reserve) needs about 40.4 kWh; the 3 × Deye 16 kWh 51.2 V Lithium Solar Battery RW-F16 we've picked gives you 43.2 kWh installed.
The array works out to 9.5 kWp — 18 panels across roughly 47 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?
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?
This system is sized to store about 40.4 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?
18 panels, about 9.5 kWp, filling roughly 47 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 / 9.5 kWp baseline.
Other system sizes
- 10 kW solar system for an office with evening backup power
- 10 kW solar system for an office with overnight backup power
- 5 kW off-grid solar system for an apartment
- 10 kW off-grid solar system for a house
- 12 kW off-grid solar system for a villa
- 6 kW off-grid solar system for a shop
- Off-grid solar system for a farm