New off-grid charger for the 48V system

We are building a new additional off-grid charger for our 48V system. This PowMr MPPT solar charge controller mounts straight onto the metal wall of the power shed and feeds the 48V battery bank from the panels. MPPT tracking keeps the harvest high even on grey days, and the fan cooled case shrugs off the current without getting hot. Nothing fancy, just a solid and affordable unit that lets us grow the array step by step. Next step is wiring it in and watching the amps come in under load.

Full spec sheet (HHJ-60A):

Parameter	Value
Model	HHJ-60A
Charging mode	3-stage
Max PV input power	720 W (12V) / 1440 W (24V) / 2100 W (36V) / 2800 W (48V)
DC input range	20-80 V (12V) / 37-105 V (24V) / 50-160 V (36V) / 72-160 V (48V)
Battery voltage auto recognition	9-15 V (12V) / 18-29 V (24V) / 30-39 V (36V) / 40-60 V (48V)
Overcharge protection	60 V
Limited current protection	61 A
Max efficiency	98.1% or higher
PV utilization	99% or higher
Temperature protection	75 C / 167 F
Fan on / off	above 45 C / below 40 C
Size	214 x 115 x 50 mm / 8.43 x 4.53 x 1.97 in
Net weight	1.12 kg / 2.43 lb
Gross weight	1.2 kg / 2.65 lb
EMC	EN61000, EN55022, EN55024
Enclosure	IP21
Ambient temperature	-20 C to +55 C
Storage temperature	-40 C to +75 C

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