I started with epever and they were OK, tried 3 models of renogy because they were recommended and all were hot garbage. Went back to epever and have recently been using Victron. I’d say the Victron are expensive for what you get, but they are bulletproof. If you just want to have a controller you know will work, that’s the way to go. But I have a dozen small pumping stations and fencers, I can’t afford Victron for all of them. The epever controllers are at least pretty reliable.

But Renogy will just fall down and not pick themselves back up. This notion that they’ll go into an error state because the battery is low, then never come back out again until you manually charge the battery up to a voltage they’re comfortable with even if they have plenty of solar power, that’s crap. I went back and forth with their customer support on all 3 that I bought, the response I ended up with always was “well, that’s what they do and we aren’t changing it”. So I put them on eBay and sold them to the next poor sucker. Even when they worked, they seemed wildly inefficient compared to the epever, and miles worse than the victrons.