Hello out there!
I've been waiting patiently for almost two years now to start work on getting solar
on our boat, but due to a pending move x-country all I could do was dream. Now I'm close enough where I can start working on the planning phase in a lot greater detail!
I'm considering 3x135W panels
(or thereabouts). One thing I'm not clear on is connections. It seems most solar panels
out there except one variant of the Kyocera
135 use MC4 connectors. But, it also seems that most installs I read about on sailboats use the junction boxes. I can see the cost benefit for using junction boxes since you get to use standard wiring
, but I do like the ease of the MC4 connectors. I'm also a little confused on the amp/volt/wire size relationship with the MC4 connectors, since I haven't seen a lot of different size AWG for the connectors. Surely there is a safe way to connect all the panels
, since it seems like grid applications with lots more panels use the MC4 connector. Perhaps they increase the voltage to keep wire size down and use an MPPT
controller to adjust?
Can someone educate me on the benefits/drawbacks of MC4 vs. junction box connections?? And on a related question, am I correct in understanding that a MPPT
controller adjusts both voltage and current
to provide optimum to the batteries?