When panels are in series the voltage adds up and the current remains the same, whilst in parallel the voltage remains the same and the current adds up, the wattage will always increase in both configurations.
For example:
Four 250W panels with the specifications of 45Voc and 5A (Isc) in series will total to 1000W, 180Voc and 5AÂ (Isc).
Four 250W panels with the specifications of 45Voc and 5A (Isc) in parallel will result in 1000W, 40Voc and 20A (Isc).
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A couple of useful bonus tips:
- Panels should always be matched, e.g. the same Voc, Isc and wattage.
- Check the specs of your solar controller and be careful not to exceed the max Voc, Isc and wattage.
