I used your info to successfully connect an Arduino MKR1010 to a Renogy Wanderer 10A (model # RNG-CTRL-WND10) charge controller. The MKR1010 natively has Serial1 on pins 13 (RX) and 14 (TX).

While getting started in solar might be a bit intimidating, Renogy has you covered with a multi-piece kit that delivers 200W of power with ease. In the bundle, you’ll get two 100W solar panels as well ...

In this episode, we convert a Ford E250 cargo van into a camper van by installing 200W of solar power on the roof using two 100W panels with different sizes and mounting brackets. The panels are ...