Eltek-Flatpack2-ESPhome

Configure and monitor Eltek Flatpack2 PSU using ESPhome, here used to charge Li-ion battery pack, controlled from Home assistant.

HW prototype

• WEMOS D1 MINI ESP32
• SN65HVD230 CAN transceiver

Sources

https://openinverter.org/forum/viewtopic.php?t=1351

Notes

• note that PSU is reverting to the default voltage with no current limit while the communication is lost
• CAN bus is wired directly from the PSU, you shall use "professional" board to connect the backplane
• there's a layer of insluating tape (polyimide, kapton) below the CAN transceiver
• no need to update serial number within the code, it will be fetched from a CAN messages
• current limiting is working only above 48V on an output terminals (not just configured voltage)

How it should looks like within the Home assistant lovelace