Hi Sebastian,
Thanks for that.
So if I understand this correctly the rectifier voltage output is decided by the batteries so over-voltage should not be an issue. I'm intrigued to know how this works (how does the battery know to draw slightly more than the battery rating (48v) to enable it to charge?). Does this mean for example, if the batteries are at 49v the rectifier will output maybe 51v, and if the batteries were at 52v the rectifier would output maybe 54v?
Also intrigued as to why charging at a low current 10A is not good for the batteries? I have a new rectifier to install (150A 1600v) as I'm unsure what the existing rectifier is rated at as it has no markings on it, so I thought best to go with a bigger one and a large heatsink to match.