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I bought a motorhome and it came with an 80w panel and 10amp PWM dual charge controller (2 x 75ah leisure batteries and vehicle battery).
I asked the dealer to install another 120w panel and they changed the 10amp controller for a 20Amp dual plus display, all good. We later decided that because we would be relying on solar more than mains EHU, we would increase the array to 300w so added another 100w, a mobile service guy who worked a lot for the dealer fitted this 100w panel. This is were I question what he did. So we now have 300w of mixed wattage solar panels on the roof and the same 20Amp plus display set up. The mobile service guy connected the 100w panel to the cables at the back of the 80w panel (he just cut the plastic back on the cables and used insulation tape to finish the joins. I asked if the 20Amp controller was OK for 300w of panels, he said yes and connected the cables to the controller.
We have been travelling in Spain and France over winter and the Charge Controller failed, the batteries were receiving up to 17 volts for a short time until I removed all the cables from the controller. Was he correct in connecting the 100w panel to the 80w panel and the mothed of connecting. Should he have increased the charge controller to. 30Amp?
I asked the dealer to install another 120w panel and they changed the 10amp controller for a 20Amp dual plus display, all good. We later decided that because we would be relying on solar more than mains EHU, we would increase the array to 300w so added another 100w, a mobile service guy who worked a lot for the dealer fitted this 100w panel. This is were I question what he did. So we now have 300w of mixed wattage solar panels on the roof and the same 20Amp plus display set up. The mobile service guy connected the 100w panel to the cables at the back of the 80w panel (he just cut the plastic back on the cables and used insulation tape to finish the joins. I asked if the 20Amp controller was OK for 300w of panels, he said yes and connected the cables to the controller.
We have been travelling in Spain and France over winter and the Charge Controller failed, the batteries were receiving up to 17 volts for a short time until I removed all the cables from the controller. Was he correct in connecting the 100w panel to the 80w panel and the mothed of connecting. Should he have increased the charge controller to. 30Amp?
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