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Solar PV String Sizing

Size solar PV string configurations against inverter MPPT voltage and current windows.

Updated Apr 2025

Dan RileyVerified

BEng Mechanical Engineering (Hons), CMIOSH, LEEA Member

Mechanical engineer and certified lifting equipment examiner with 18 years in heavy industry, structural steelwork, and crane operations across construction and resources sectors.

Updated
1 April 2025

Professional verification required

These calculations are provided for estimation and educational purposes only. Results must be verified by a suitably qualified and licensed engineer before use in any design, specification, or construction context. Numly accepts no liability for decisions made on the basis of these results.

Panel open-circuit voltage (Voc)

Panel MPPT voltage (Vmp)

Panel MPPT current (Imp)

Panel short-circuit current (Isc)

Inverter max DC input voltage

Inverter MPPT min voltage

Inverter max DC input current (per MPPT)

Minimum site temperature

°C

Enter values above to see your result

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