Top solar panel brands for off-grid setups

Cheers for the recommendations. Question though—how much of a real-world difference are we talking with diffuse performance? I'm planning a setup for a garden office and motorhome, so I'm torn between chasing higher wattage specs versus what actually works on grey British days. Are Canadian Solar and Trina noticeably better than budget options like Renogy, or is it marginal?

Canadian Solar panels have been solid on my motorhome setup for three years—genuinely impressed with their low-light performance in this dreary climate. Trina's decent too, though I've found they're a bit pricier. Pair either with a decent Victron MPPT controller and you'll squeeze every last watt from our glorious British clouds.

Are you lot getting noticeably better winter output with those brands? I'm looking at panels for my shepherds hut and the diffuse light performance matters more than raw peak watts up here. Also curious whether monocrystalline vs polycrystalline made a tangible difference in your actual monthly generation figures?