On this side of the pond they (we) use Sterling, Marlin (or Merlin), Heart, all have good name. Merlin claims it will work
with any alt. Sterling and Heart have nice external panels
and all the toys and whistles.
Everybody who uses this of my friends have nothing but words of praise. I have seen an installation
with a 60A alt, 240 Ah (brand new AGMs) batteries
and one of those new regulators that could pack it from half empty to full (120 A) in just below 3 hours. Probably the best result I have ever seen except with a shore power charger