I was comparing their solar panels to HQST panels today. Renogy is a good bit more expensive, but it looks like their dimensions are much better for fitting to van roof - the 100 W panels are narrow for mounting long ways, and the 200 W panels fit nicely crosswise. The 200 W panels are $300 which seems pricey but may be worth it if it's as simple as bolting to the existing rails.I have their 60A MPPT charge controller, a 40A DC-DC charger, and their 100Ah LiFePO4 battery. All serving well. I would've gotten their inverter too but they were out of stock at the time. I find their products to be good, priced reasonably, and, importantly, have decent North American based support. This is key for a noob with vehicle electrics systems.
Oh, and I recently got their shunt-based battery monitor. It's excellent.
Looking at charge converters and can't figure out what the amp rating means. Is it output or input? Or both? For instance, solar panel voltage is typically higher than the battery, so the current will increase on output. 4 panels at 5.3 amps = 21.2 amps in, but at 12 volts it's 33 amps out. Will a 30 amp charge controller work? Assuming less than 90% efficiency I guess it would but is the current rating output or input?