The charge controllers used for the original arrays were two MUST PC1800F ones. The one for the new array is again a PC1800F. These things are great. Yes, the fan is loud when they’re under over 1kW load, but since these are in a dedicated tech building, I don’t mind. I you want quiet, Victron is perfect. The price is amazing for a 100A (up to 6kW solar input) and it does perform as advertised. The input voltage could be higher (it’s 145V max), but for this price I’m not complaining. I think they have some that support higher voltages now, but I don’t have the details.
You can get them from Aliexpress: https://www.aliexpress.com/item/1005005128835795.html
At the time of writing, they go for 141 Euro; shipping around 45 Euro.
My code to talk to this device can be found here: https://github.com/PurpleAlien/must-power_grafana
In addition to the solar charge controllers, I also have a battery charger which is connected to the generator. While I could use the inverter(s) to charge the batteries, I like to have a separate, dedicated device for this. Instead of buying a special (expensive) charger, I used a Telecom Rectifier (an Emerson/Vertiv R48-3000e3). The advantage of these things is they are extremely reliable (mean time between failure measured in the hundreds of thousands of hours) and efficient (96%), and are used to keep critical infrastructure powered especially from ‘dirty’ sources such as certain generators.
These things are cheaply available from various sources such as this one on Aliexpress where I bought mine:
https://s.click.aliexpress.com/e/_DeSzqo9
Granted, they’re used – but at under 100 Euro including shipping, for a 3000W charger, this is excellent. Settings can be changed over CAN. By the way, if you ever heard of a Chargeverter: it is also made with rectifiers.
My code to talk to this device can be found here: https://github.com/PurpleAlien/R48_Rectifier