HOW TO USE IT
How to use the Solar Inverter Replacement Cost Calculator
- 1
Enter the system size in kW.
- 2
Choose the inverter type (0 = string, 1 = microinverters).
- 3
Optional: enter a custom cost to override the estimate.
- 4
Review the estimated replacement cost.
THE MATH
Inverter replacement formula
Cost = system kW × estimated price per kWReplacement is often scaled per kW of the system. Microinverters cost more per unit, but per kW the estimate stays close.
PRACTICAL EXAMPLE
An 8 kW system with a string inverter
8 kW × $180/kW = about $1,440, within the common $1,000–$2,500 installed range depending on brand.
FAQ
Frequently asked questions
What does inverter replacement cost?
In 2026, replacing a residential string inverter often runs $1,000 to $2,500 installed; microinverters are swapped per unit.
When should it be replaced?
Most string inverters last 10–15 years. Watch for production drops and error codes.