Solar PV System Calculator
The Solar PV System Calculator finds the panel count, array size, and roof area for a target PV capacity, with string sizing. Example: for a 100 kWp grid-tie solar array in Manila, Total panels = 304 panels, Array size = 121.6 kWp, Roof area = 758.8 m² (per IEC 62548:2016 | IEC 61215 | IEC 62109 | PEC 2017 Art.6.90 | PAGASA).
How it works
Computed from your inputs per IEC 62548:2016 | IEC 61215 | IEC 62109 | PEC 2017 Art.6.90 | PAGASA.
Worked example (Electrical & Power)
Inputs: a 100 kWp grid-tie solar array in Manila.
| Result | Value |
|---|---|
| Total panels | 304 panels |
| Array size | 121.6 kWp |
| Roof area | 758.8 m² |
Computed live by WorkHive's calculation engine; standard: IEC 62548:2016 | IEC 61215 | IEC 62109 | PEC 2017 Art.6.90 | PAGASA.
How to use this calculator
- Enter the figures for the duty you are sizing: the worked example below uses a 100 kWp grid-tie solar array in Manila.
- The calculator returns Total panels, Array size, Roof area, computed per IEC 62548:2016.
- Check the worked example to confirm the method matches how you would do it by hand, then run your own numbers in the interactive tool.
FAQ
What is a solar PV system sizing calculator?
The Solar PV System Calculator is a free online tool that computes finds the panel count, array size, and roof area for a target PV capacity, with string sizing. It shows the formula and a fully worked example so you can check the method, not just the number.
How is it calculated?
The result is computed from your inputs following IEC 62548:2016. The worked example on this page shows a real computation with real numbers.
Is the calculator free?
Yes. WorkHive's engineering calculators are free to use, no sign-up needed for the tools. WorkHive is a free, offline-first maintenance platform built for Philippine industrial plants.
Run it on your own numbers
Open the interactive Solar PV System Calculator in WorkHive: free, no sign-up needed for the calculators.