I've heard a lot of good things about their gear, I've got no idea of the provenance of my panel and charge controller but it serves my needs, except during winter - from beginning of November till early February it's fairly crap - I need a new charge controller now so I can hook in the turbine and panel through one system. It's either that or I fully replace the solar and keep the turbine separate, in which case Renology would probably be what I'd want to try