Hi All

I am planning a DIY install. It consists of 6 x JA Solar 545W panels. With 2 parallel strings of 3 in series. (Hope that makes sense 😀)

I was hoping to use QC4 2 to 1 connectors/adaptors at the panels to bring the 2 series strings into the parallel string.

Would this be advisable? Or do I need to run both series strings to a combiner box at the inverter where the parallel connection will be done?

My preference would be to do the parallel connection at the PV panels if possible.

Thanks  

For safety and regulatory reasons, a combiner box would be advised. For solar installs you need to be able to isolate the PV without having to touch the actual inverter etc. Plus most combiner boxes have fuses/surge arrestors to protect the inverter from lightning strikes etc. I know how tempting it is just to wire panel directly into your inverter but a combiner box is far safer and you will regret not having one if your end up with an electrical fire...

Thank you @Psy. I probably wasn’t clear enough. I will still use a PV termination box with SPD and DC Circuit Breaker for the incoming PV feed. My question is to do the parallel connections in the PV DB which will be located close to the inverter or at the solar panels with QC4 2:1 adapters?

Im trying to avoid running 4 conductors from the PV array to the to the PV DB if possible.

Pic of PV DB attached.

Oh I see, my bad. Where you put the parallel connection shouldn't matter too much. As long at the cables and breakers are rated for your voltage and current then you should be A for away!👍

@Psy great. Thank you.