Found a few low voltage isolated buck converters on Amazon, 12/24vdc in, 12/5vdc out. While I could make those work, the cost is high. I need something that is able to deliver 12vdc, at least 100w.
Best solution I have found is:
Orion-Tr 12/12-9 (110 W)
Orion-Tr 12/24-5 (120 W)
Both offer 200v 'galvanic' isolation (vs intrinsic?) and should work.
Cost is higher at $64 ea, with needed qty of 4. Ultimately the outputs will be connected to individual LFP cells that are already connected 4s. Basically Top charging. Haven't been able to use 'traditional' LFP batteries as I would be pulling ~180A short burst intermittently. Basically is 2nd Battery used only for starting an engine.
Current solution is using 12vdc to 120vdc converter, and feeding to an isolated smps that is rated for DC on AC inputs. Repeat 4 times. Lots of underhood space used.
While above is very doable, a 500w inverter feeding power supply then LFP single cell chargers through isolation transformers should work as well. Or find isolated versions of the LFP cell chargers.
Anyone have suggestions on isolated converters, or isolated single cell LFP charger? My searches at Amazon, Digikey, Mouser, Allied have been kind of dismal.
And in case you are wondering: Yes, this abomination would comprise several loads switched by latching relays.
~SD
