I use Meanwell HLG been tested by serval exspercancsed community members working in the electronics industry to give a very good and stable and constant DC CC CV power supply. Pretty boom proof when it comes to reliability no fan lots of in built protection. Mouser have consistently been one of the cheapest places I have bout then from and do free shipping on ordered over £50 but can purchest from els we’re. Down side is You will also need to add your own plug and charger socket and there not cheep even tho I provided links to a place that sells them cheep.
2.28A 10s for comparison and slow charging
https://www.mouser.co.uk/ProductDetail/MEAN-WELL/HLG-100H-42A?qs=sGAEpiMZZMvV8Y9YugmIglfAurgc9j6Ht1kqlc%2BvUwk%3D
4.4a 10s 3p 30q normal charge (with in Samsung 30Q data sheet)
11.4a 10s3p q30 fast charge (with in Samsung 30Q data sheet)
https://www.mouser.co.uk/ProductDetail/MEAN-WELL/HLG-480H-42A?qs=sGAEpiMZZMt5PRBMPTWcaaBR213nhm0gS4uVKxMLThvbt75CaetaxQ%3D%3D
5.72a 10s 4p 30q normal charge (with in Samsung 30Q data sheet)
https://www.mouser.co.uk/ProductDetail/MEAN-WELL/HLG-240H-42A?qs=sGAEpiMZZMt5PRBMPTWcaXhz6ct9mvDNfYxzoeeutVc%3D
14.3a 10s4p or higher P count q30 fast charge (with in Samsung 30Q data sheet)
https://www.mouser.co.uk/ProductDetail/MEAN-WELL/HLG-600H-42A?qs=sGAEpiMZZMt5PRBMPTWcadpJaJ00SD0WgzrKnJf4XOCSJkTdDt%2BIvw%3D%3D
For 12s you will need a Philips1 screwdriver to adjust the voltage pot 50.4v and a multi meter to see the voltage the 1st time you set it up. Iv included the options you might need for a higher voltage for some BMS auto charge detection.
12s3p 30q normal charge (with in Samsung 30Q data sheet)
4.5a Need to set the Voltage pot to 50.4v
https://www.mouser.co.uk/ProductDetail/MEAN-WELL/HLG-240H-54?qs=sGAEpiMZZMt5PRBMPTWcadJrg7R%2FG3VfH7HonL%2F%2F0Bo%3D
5a Need to set Curent pot to 4.5a Voltage pot to 50.4v
https://www.mouser.co.uk/ProductDetail/MEAN-WELL/HLG-240H-48A?qs=sGAEpiMZZMt5PRBMPTWcaXhz6ct9mvDN8tBTRSIxJCw%3D
12s3p Fast Charge or higher p count (with in Samsung 30Q data sheet)
11.2a Need to set the Voltage pot to 50.4v
https://www.mouser.co.uk/ProductDetail/MEAN-WELL/HLG-600H-54A?qs=sGAEpiMZZMt5PRBMPTWcadpJaJ00SD0W6iEFjvZ4%2BYCEPYANC5Oipw%3D%3D
12.5a Need to set Voltage pot to 50.4v
https://www.mouser.co.uk/ProductDetail/MEAN-WELL/HLG-600H-48A?qs=sGAEpiMZZMtIHXa%2BTo%2Fr2U46Jaiz3IMPa6ymLReth78%3D
12s4p 30q normal charge (with in Samsung 30Q data sheet)
5.95a Need to set the Voltage pot to 50.4v
https://www.mouser.co.uk/ProductDetail/MEAN-WELL/HLG-320H-54A?qs=sGAEpiMZZMt5PRBMPTWcaRTgZe1UVjfl6y%2F63um6Sts%3D
6.7a Need to set Curent pot to 6a Voltage pot to 50.4v
https://www.mouser.co.uk/ProductDetail/MEAN-WELL/HLG-320H-48A?qs=sGAEpiMZZMt5PRBMPTWcaRTgZe1UVjfl49KWJe2LRtQ%3D