Solar Panel Series Parallel Calculator
Compute string Voc/Vmp and parallel Isc/Imp from module ratings and series × parallel counts.
Quick answer
V_string = Voc × N_series; I_array = Isc × N_parallel. Example: Voc 49 V × 2S, Isc 11 A × 2P → 98 V / 22 A STC. Hub: Solar calculator.
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Engineering disclaimer
Planning estimate only. Check cold Voc against inverter/MPPT max voltage before procurement.
Layouts at same module
| Layout | Voc | Isc |
|---|
People also ask
- Series vs parallel? Series raises voltage; parallel raises current.
- Solar panel voltage? String Voc = module Voc × modules in series (check cold Voc).
- Power? ≈ Vmp×Imp×Ns×Np.
- Next? MPPT current and cold Voc.
Planning guidance
- Feed Isc×Np into MPPT sizing.
- Hub: Solar calculator.
Typical scenarios
- 2S2P hybrid: Common small commercial string.
- 3S4P: Higher current—watch MPPT and cable ampacity.
- Cold climate: Voc rises—limit series count.
Formula (quick reference)
V_oc,string = Voc × N_s; I_sc,array = Isc × N_p; P ≈ Vmp × Imp × N_s × N_p.
This page is the site’s solar panel voltage calculator for string Voc/Vmp—enter module Voc and series count. Cold Voc screening continues in MPPT sizing. Wiring method: how to wire solar panels in series and parallel.
Frequently Asked Questions
How do series and parallel affect PV strings?
Series multiplies voltage; parallel multiplies current. Power scales with both counts.
How do I calculate solar panel / string voltage?
String Voc = module Voc × modules in series; string Vmp = Vmp × N_s. Example: Voc 49 V × 2S → 98 V STC. Use this when intent is “solar panel voltage calculator”—absorbed here, not a separate page.
What about cold temperature?
Voc increases when cold—verify against controller/inverter absolute maximum (often via temperature coefficient × ΔT in MPPT sizing).
Difference from MPPT sizing?
This tool reports STC string V/I; MPPT sizing applies safety factor to current and cold Voc checks.
What is the next step?
Size MPPT current and DC cable ampacity for the parallel current.
How it works
Ideal series-parallel scaling at STC. Real systems need temperature corrections and mismatch margins.
Solar panel voltage (string Voc)
Enter module Voc and series count to get string open-circuit voltage for inverter/MPPT window checks. Parallel strings do not change voltage—they raise current (Isc × N_p). Confirm cold-site Voc before procurement.