Guru
Joined: 17/10/2017
Location: BelgiumPosts: 481
| Posted: 07:48pm 24 Jan 2024 |
A lot has happend since the initial start of this project, a lot of people are building these (improved) units with great succes.
So trigered by peoples strong start of the year I was thinking to give this a small update.
I wanted to build a triple unit to manage my solar input on a safe way, the original concept worked so great I never bothered to finish my triple unit untill recently I've made some progress and put it in service.
It's not yet finished and I'm allready thinking of a new design but I hope to finish this little one with some minor changes.
Problems with these are:
-Not repair friendly, a lot is on top of eachother
-Some board are proto and not really a proper pcb
-NTC's on the right place
-no fuses on the output, except the main fuse
-etc
I did add external ref voltage and a mosfetdriver to each poida controller board to make 12V pulses to the mppt powerboards. It looked more robust and buffers the 5V signal of the arduino.
I've also increased my solar power since then so I need to build some extra units. I like to run these without active cooling.
In the pipeline is a little and a bigger BOOST converter version of the original buck powerboard, TBC..
The power output is combined by 3 diodes wich are optional and increase the losses a bit, but I'm feeling safer this way for now.
Edited 2024-01-25 06:01 by nickskethisniks