I did some research into HV CC power supplies, and think we can get off the shelf components to make one for less than $100.
The supply would be made with:
LPC-20-350---------$16.57
LPC-20-350, Mean Well LPC-20-350
Constant current supply
three RS-25-48-----$20.16-----$60.48
RS-25-48, Mean Well RS-25-48
Adjustable fixed voltage
one RS-15-12-------$18.14
RS-15-12, Mean Well RS-15-12
to run the battery fan
All supplies are universal AC inputs 85-260VAC, have isolated outputs.
The outputs of the three fixed 48V and one constant current supply would be connected in series to yield a 148 to 192VDC 350MA CC supply for the charging/balancing supply, and the 12V supply connected to the battery cooling fan.
The TRC people only sell to OEM, but I could order them through my business.
Of course if we did a group buy, the pricing could be better.
Output fuse and diode, and some leads and power cord, and we have a 350MA CC grid charger/balancer for just a bit over $100.
