Trying to get back into an old project but having problems.
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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I reckon to start up Auto mode, scan a set number of places across the spectrum of PWM values. Pick the max and then hunt from there. Or scan between the 2 highest and get the best value there and then hunt. Could be done reasonably quickly. 10 points, 3 points, hunt.
Very interesting series. Why do we need the arduino to find the MPPT point? The MPP is published for panels and is about the same for all conditions. A regular ebay buck converter has a built in voltage controller to control its output voltage, if I modified that to control the input voltage would that work?
Hey @julian ilett, it doesn't seem to be boosting the amps out output, unless I'm missing something?
are you going to revisit this at some point? i've been looking for other projects like this and it seems like a lot of people have attempted building an MPPT charge controller but all of them failed or abandoned the projects, and none have put up their entire work (code + PCB designs) on GitHub or anything like that… it's a shame really, i'd love to build one too but ironically i have a lot of experience on the software side but none on the hardware side, so i don't know how to get started there
Hi Julian, is it possible to get the latest source code for the muppet project, quite a few of your viewer have been asking for a while now, as your website no longer works for quite a while now. Thnaks
If the ice cream was chocolate with nuts, it would be called a Drumstick.
That inductor in the thumbnail looked massive.
Good idea
Unfortunately this phone or Google has mixed up your videos and 6 ,19,21, or 5. Are not in order. So I ask, can you advise me what size panel do I need to charge a 6 volt lead acid solar battery? I have CMP 12 controllers which show Charge and Volt meter shows steady 3V. How do I get it to switch to load I have two. Both have this Problem, but 2nd some times does indicate Load with volt meter showing 6.3 /6.8. What do you think? I did want to buy your PWM nano but I am really confused now pouring rain no ice cream I have large LDR's but where to fit them to get garden lights to come on?
Amazon provided the CMP12's. Charge controllers but light control is not happening automatically so LOAD does not work what do you think? Thank you?
I believe that the inductor with fewer turns doesn't filter out the pwm properly, causing high voltage spikes which the arduino is programmed to detect causing it to drop down the output to zero for safety reasons.
You inductor core is the incorrect type for this, it will saturate and become useless at very low current. You need a iron dust or or sendust inductor with a lowish AL value. Iron dust core are normally yellow, and sendust are usually shiny black. You will also need many more turns due to the lower AL value. …good luck 🙂