Average irradiation for your location.
Energy loss (wiring, dust, heat). Typical: 75-85%.
Total Array: 0 kW
Every solar panel has a technical label on the back. These values are tested under Standard Test Conditions (STC): 1000W/m², 25°C.
| Parameter | What it means |
|---|---|
| Voc (Open Circuit) | Voltage measured with a multimeter when panel is disconnected. Highest possible voltage. |
| Isc (Short Circuit) | Current measured when positive/negative leads are joined. Highest possible current. |
| Vmp / Imp | Values at "Maximum Power". This is where the panel actually operates under load. |
To protect your wiring from overcurrent, you must install a DC fuse or breaker. The standard safety factor is 1.56 times the short-circuit current.
Example: If your panel has an Isc of 11.5A:
11.5A × 1.56 = 17.94A
Select a 20A DC Circuit Breaker.