I have a remote location where I spend sometimes my weekends, there is no electricity and I found too OSPController mentioned by rsk96. I have 2 photovoltaic panels, each one has output voltage open circuit 41.3 Vdc, I connected them in series so in ideal sunlight these can deliver 82.6 Vdc. I use a DROK DKP6012 SMPS buck, the spec for this PSU is 75 Vdc input voltage. I checked the main parts for the buck converter, MOSFET, diodes, caps, all are rated for 100 Vdc, so they should handle well my 82.6 Vdc.
Also the OSPController project mentioned that DROK DKP6012 can handle this extra voltage well.
When I tested first time the setup, all worked fine, my panels supplied 73 Vdc, I charged 1.5 kW in my batteries.
A weekend ago, the panels were able to supply 78 Vdc and I had a nasty surprise to see that input voltage at the output, somehow the N channel MOSFET died (MPN is IPP045N10N3G from Infineon) and output was not regulated anymore.
I found here on the forum that someone did a little bit of reverse engineering on DROK DKP6012 PSU (
https://www.eevblog.com/forum/projects/modifying-drok-buck-converter-for-computer-control/) but I wonder if someone can help me with more details on which parts / functional blocks can limit the input voltage at 75 Vdc on this PSU.
Can be the driver block for the MOSFET? Can be the feedback loop? Can be the PSU buck block for the control block (microcontroller PCBA)? If someone has already a schematic for this PSU, it will be great, thanks!