Quick estimate
Quick feasibility estimator
Area alone gets you to roughly the right scale. Every assumption behind the number stays on the page.
A tool that takes a site area or an installed capacity and roughly estimates the installed capacity, the annual energy yield, and a 20-year cumulative revenue range.
Input
The default, KRW 147.686, is the mainland ceiling price in the first 2026 competitive bidding round for long-term fixed-price solar contracts. A ceiling is a maximum; awarded prices come in below it. Drag it down and compare.
Result
Enter a site area on the left,
and the rough estimate appears here.
The assumptions behind these numbers
- Area per kW
- 12 m² per kW (3.6 pyeong)
- Annual yield per kW
- 1,150 to 1,250 kWh/kW
- Sale price
- KRW 147.7/kWh
- Annual degradation rate
- 0.5% per year
- Period
- 20 years
- Not included
- Construction, financing, operating cost, and tax
Area per kW and annual yield per kW are conservative rules of thumb from design practice. In reality they move with terrain, slope, orientation, shading, setback rules, and grid conditions. Two sites of the same area can end up far apart.
On top of that, with the Renewable Portfolio Standard (RPS) abolished, new installations earn through the renewable energy contract market from 2027. That change is not reflected in this calculation. Read what changes
This estimator is for reference only. It cannot be used as the basis of an investment or trading decision.
What this is not
What this estimator cannot tell you
Whether the land can be permitted
If the land-use zoning designation, the municipal setback ordinance, or the development activity permit requirements block it, no amount of area rescues the project. The rules differ from one local government to the next.
Whether it can reach the grid
With no spare capacity at the nearby substation, you wait. The grid connection queue is the single largest cause of delay.
What you actually keep
Net profit appears only once construction cost, financing terms, operating cost, and tax go in. Two sites of the same capacity can land far apart.
What happens when the rules change
With RPS abolished, the revenue structure for new installations moves to the renewable energy contract market from 2027. Your commissioning date sets your revenue structure.
Send us the parcel number and the area, and we’ll cover all four in a report within about five business days. There is no charge. See what the report contains
Disclaimer
About these numbers
- · The result is revenue, not net profit. Construction cost, financing cost, operating cost, insurance, and tax are not in it.
- · The default sale price of KRW 147.686/kWh is the mainland ceiling price in the first 2026 competitive bidding round for long-term fixed-price solar contracts. A ceiling is a maximum; awarded prices come in below it.
- · Area per kW and annual yield per kW are conservative rules of thumb from design practice. Terrain, slope, orientation, shading, and setback rules move the real values.
- · The 20-year total is a simple sum that accounts only for 0.5% annual degradation. Inflation, interest rates, and policy change are not considered.
- · GRIDAEND does not guarantee a rate of return. A full assessment presents conservative, base, and optimistic scenarios, each with its assumptions.
- · This estimator is for reference only. It cannot be used as the basis of an investment or trading decision.
Free assessment
When you need the real number, not a rough one
Send us the parcel number and the area. Within about five business days, we come back with a report on permitting risk, grid conditions, energy yield, and the 20-year cash flow.
Available to landowners, building owners, or their authorized representatives · Results come back as a report