How Long Until an EV Charging Station Pays Back?
A clear breakdown of how to calculate the payback period of an EV charging station — from electricity cost and selling price to utilization, with a real example.
The first question every property owner asks before investing in an EV charging station is “How many years until it pays back?” There’s no single answer — it depends on four key factors we’ll walk through here.
The simple payback equation
Payback period = Total investment ÷ Gross profit per month
Simple on the surface, but both sides hide details that can change the result several times over.
Where the per-kWh profit comes from
For every unit of energy sold, gross profit is calculated as:
- Selling price ฿7.90 / kWh
- minus industrial electricity (PEA) ฿3.50 / kWh
- minus platform / app fee of about 5% of the selling price (฿0.395)
That leaves roughly ฿4.00 / kWh gross profit, or about 51% of the selling price.
Four factors that decide fast vs. slow payback
- Power per charger (kW) — higher power means more energy sold per hour
- Number of chargers — raises total capacity and serves more cars at once
- Real daily usage hours — the most important variable; prime locations may run 6–10 hrs/day
- All-in cost per unit — cabinet, installation, transformer and systems
A real example
A 2-charger station rated at 240 kW, used at full power ~4 hrs/day:
- Energy per day = 480 kW × 4 hrs = 1,920 kWh
- Gross profit per month ≈ 1,920 × 4.00 × 30 = ~230,000 THB
From these numbers, payback typically lands in the 1–4 year range depending on investment and real utilization.
Want to see numbers for your own location? Adjust the variables in our ROI calculator.
Summary
Payback isn’t guesswork. Once you understand the four factors above, you can judge what station size fits your space and whether it’s worth the investment — eEV surveys and analyzes the real numbers for you, free, before you decide.