12.00 kW system guide
12.00kW Solar System Price, Output and Savings
Upper residential / small commercial sizing for high continuous daytime loads.
At a glance: about 26–28 panels (450 W), 51.3–64.8 m² roof, roughly 49.3–59.2 kWh/day, installed around R200 640–R255 360 grid-tied.
Configurations
| Config | What it includes | Indicative installed |
|---|---|---|
| Panels + inverter | Grid-tied, no battery. Daytime self-consumption focus. | R200 640–R255 360 |
| Hybrid with battery | Hybrid inverter + storage for evening use / limited backup. | R274 560–R349 440 |
| Backup-focused | Larger battery sized to essential loads — use the battery calculator. | Above hybrid range |
Estimated generation by solar-yield zone
| Region | Yield (kWh/kWp) | Annual generation | Indicative year-1 saving |
|---|---|---|---|
| Eastern Cape | 1600 | 19 200 kWh | R59 585 |
| Free State | 1750 | 21 000 kWh | R65 171 |
| Gauteng highveld | 1700 | 20 400 kWh | R63 309 |
| KwaZulu-Natal coast | 1500 | 18 000 kWh | R55 861 |
| Northern Cape | 1900 | 22 800 kWh | R70 758 |
| Western Cape coast | 1550 | 18 600 kWh | R57 723 |
Who a 12.00 kW system suits
Typical monthly usage match: 1000–1600 kWh.
Plan for structural checks, larger inverter gear and municipal connection rules.
What it can and cannot power
It can offset a large share of daytime household loads. It will not remove fixed network charges, and without a correctly sized battery it will not cover full load-shedding backup for high essential loads.
Local tariff examples
Adjacent system sizes
Frequently asked questions
Do I need three-phase for 12kW?
Often yes, depending on inverter choice and supply. An installer must confirm electrical constraints.
Related guides
Next step
Get a personalised estimate for your roof using satellite data, your usage and local tariff where available.