Solar Farm Land Requirement Calculator

Work out solar farm land requirement instantly with clear inputs, formula shown and shareable results.

About Solar Farm Land Requirement Calculator

Module area is capacity divided by efficiency, since 1 kWp at standard test conditions corresponds to 1000 W/m2 of irradiance. Dividing by ground coverage ratio accounts for inter-row spacing needed to limit shading, and a further allowance covers roads, substation and boundary setbacks. Typical density is 0.4-0.6 MWp per hectare.

Formulas

Module area

Module area (m2) = capacity (kWp) x 1000 / module efficiency

Land

Land = module area / ground coverage ratio x (1 + balance of plant allowance)

Worked example

With the default values below, Solar Farm Land Requirement Calculator returns Land Required of 68.452. Change any input above and every figure here is recalculated in your browser.

Inputs used

Plant Capacityminimum 0 MWp: 50 MWp
Module Efficiencyaccepts 1–40 %: 21 %
Ground Coverage Ratioaccepts 5–100 %: 40 %
Roads, Substation And Setback Allowanceaccepts 0–60 %: 15 %

Results

Land Required: 68.452
Total Module Area: 238,095.2
Array Footprint: 59.524
Power Density: 0.7304

Step by step

1Values used
2Module area
3Land
4Land Required= 68.452
5Total Module Area= 238,095.2
6Array Footprint= 59.524
7Power Density= 0.7304

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

What sets the ground coverage ratio?

Latitude and the acceptable shading loss. Higher latitudes need wider row spacing to avoid winter self-shading, so GCR falls from 45-50% near the equator to 25-35% at high latitudes.

Does tracking need more land?

Yes, typically 20-40% more than fixed tilt for the same capacity, because trackers need clearance to rotate without shading each other. The extra yield usually justifies it.