Solar & storage
Solar Inverter Capacity Estimate Calculator
A nameplate capacity arithmetic estimate using the ratio you enter.
02 / Estimate
Estimated inverter capacity
Enter all explicit parameters to calculate.
Method and boundaries
Defines the DC-to-AC ratio as array DC nameplate capacity divided by total inverter AC nameplate capacity. No efficiency, clipping, yield, electrical compatibility or compliance decision is modeled.
FAQ
What does this calculator compute?
The DC-to-AC ratio is array DC nameplate capacity divided by the total inverter AC nameplate capacity you enter.
What inputs does the ratio need?
Enter the array DC nameplate and the inverter AC nameplate. Both values stay in the units you typed; the tool does not apply an efficiency curve.
What is not modeled?
Efficiency, clipping, energy yield, electrical compatibility, and compliance are not modeled.
Source records
NREL SAM system design (SRC-031)
Institution: NREL
Section: Array DC capacity, inverter AC capacity, and DC-to-AC ratio
URL on the calculation record: https://samrepo.nlr.gov/help/pv_system_design.html
Verification date: 2026-10-12
Status: review-required
NREL SAM inverter (SRC-032)
Institution: NREL
Section: Maximum AC output and maximum DC input as nameplate context
URL on the calculation record: https://samrepo.nlr.gov/help/pv_inverter.html
Verification date: 2026-10-12
Status: review-required