Savings calculator + Solar tax deduction
Estimate your system size, savings and tax deduction of up to 200,000 baht from your details, with recommended packages to choose from
See how much you could save each year
Enter your details to find your personal tax deduction plan, with deductions of up to 200,000 baht
Enter your annual income and monthly electricity bill before calculating
Solar installation prices by system size
Approximate price range per system, including equipment and installation labor. Savings depend on each home's share of daytime electricity use
| System size | Best for | Approximate installation price | Approximate electricity savings |
|---|---|---|---|
| 3 kW | Homes with bills of 2,000–3,000 baht/month | 90,000 – 130,000 baht | About 1,200 – 1,800 baht/month |
| 5 kW | Homes with bills of 3,000–5,000 baht/month | 150,000 – 210,000 baht | About 2,000 – 3,000 baht/month |
| 10 kW | Homes with bills over 8,000 baht/month, or with an EV | 280,000 – 380,000 baht | About 4,000 – 6,000 baht/month |
Actual prices are confirmed after a site survey and depend on roof type, cable runs and chosen equipment — calculate from your own bill on the Payback + Tax Deduction calculator page
FAQ
How much tax can I deduct for solar?
The tax deduction measure for solar installation costs allows deductions of up to 200,000 baht under the conditions for that tax year. Use the calculator on this page for an instant preliminary estimate
What does this calculator work out?
It calculates the right solar system size for your bill, monthly electricity savings, payback period and tax deduction, using EV Power Energy's real package prices
What information do I need for the calculation?
Just your average monthly electricity bill. The calculator recommends a suitable system size and package, with estimated savings and breakeven instantly
Is solar worth it with a 3,000-baht monthly bill?
A bill of around 3,000 baht a month usually suits a 3–5 kW system, which pays back within the first several years of a system lifespan of over 20 years — depending on your share of daytime use
What documents do I need to claim the tax deduction?
You need a receipt and tax invoice from the installer, plus documents describing the installed system. EV Power Energy issues all the documents the measure requires
How are electricity savings calculated?
From the amount of power the system produces each month compared with the rate you currently pay, counting mainly the portion you use yourself during the day