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Completing the construction of a PWM5 Femto (V2) solar charge controller. Adding the high current components, connecting wires and putting it in a box.
PIC microcontroller programming video:
https://odysee.com/ @julian256:d/pwm5-solar-charge-controller-pic:c
PCB schematic, layouts and firmware here:
https://easyeda.com/julian256/pwm5-femto
Any questions about JLCPCB or ordering, pls email support @jlcpcb.com
Completing the construction of a PWM5 Femto (V2) solar charge controller. Adding the high current components, connecting wires and putting it in a box.
PIC microcontroller programming video:
https://odysee.com/ @julian256:d/pwm5-solar-charge-controller-pic:c
PCB schematic, layouts and firmware here:
https://easyeda.com/julian256/pwm5-femto
I can not be able to download the .ASM successfully please google drive will be better
Nice, clean job. Looks and functions well, you can tell there was thought in all parts of this design. Well done, sir.
whats the self consumption of the controller?
I currently have a Solar Panel – MPPT – Leisure battery setup in my mini camper van, but want to add a split-charge based system to trickle charge the leisure battery off the ignition/alternator.
I'm not fancying running cables from the starter battery through the van for that, but I can use the 12v10A accessory socket in the back. Would the "PWM5 Femto (V2)" be safe to use for this purpose? Rather than an expensive battery-to-battery charger.
This could all be a silly idea, but I feel the 12v accessory socket is a good source of power to top-up the leisure battery when driving.
Will the solar panel have to have a blocking diode in series; else at night the MOSFET could turn on and battery reverse feed into the panel?
Don't we say 'earth 'in this country, not 'ground'?
Why do you use PWM when MPPT is more efficient?
Hi Julian, what is the green grid board called?
Julian – did I miss you adding a diode in the wiring between the solar panel and the PWM5 or do you no longer consider it necessary?
Always a joy watching your videos. You said UV glue? What? Has it changed? All the UV glue I have seen is brittle and sad. Are you bloody mad I say?
Julian – keep in mind that natural colour nylon cable ties (or as I call them, zippy ties) will gradually go brittle over time due to the UV light from the sun. Eventually after some years, the tie will break. For use outside, or anywhere where there may be UV light, it’s recommended that the black type are used (these are normally UV resistant).
Julian – How do you crimp your MC-4 connectors? Do you use a proper crimping tool? Or do you solder them?
Nice. While you were using the hot air gun, I was waiting for the SMD components to fall off. 🙂
Julian, I don't believe that your 6mm drill bit has blunted due to rust. Instead, it looks to me that you were drilling in reverse!
There was a nice spot at the top of the enclosure to screw down the charge controller via the mosfet… The only other thing that I might have done is fit two water proof switches, one for the panel and the other for the battery, it just makes life easier if you ever need to switch things off in a hurry compared to trying to rip off hot melt wire's from the batteries LoL… I always try to accommodate enough for Murphy's Law!
Incidentally, I purchased two MPPT Charge Controllers that you reviewed, it's the one that has an adjustable constant voltage output and there is also another adjustment to tune in the panel. Mate! This little thing is pretty amazing! I have it hooked up to one 24V panel and on the other side I have four 8Ah (UPS type) LiFePo4 Batteries. I have had it running for some time now, I have a computer cooling fan rated at 12V 0.65mA as a test load, we have had at least 3 days of no direct sunlight! Not in bloody Australia!
The fan has been running day and night, battery voltage drops to 13.25V by early morning just before it starts getting light but as soon as it starts to brighten up even a little bit, the little blue LED light's up! Doesn't take long before the batteries are fully charged!
It's just a PCB board with an inductor and a heatsink on the back but I liked it's performance so much that I ordered another four! They can be paralleld and each one is rated at 100W 5A.. thank you for your review of it, I saw it on your channel and I just knew that I had to have one, my son has one of those all in one MPP Brand Charge Controllers which has the solar charge controller, a grid tie battery charger, an 800W inverter. It's a great unit but every time I connect another load directly to the batteries, it senses the extra load and stop's to think about it while the battery goes from a light charge to a high drain! Really annoying! Trying to use the 12V for stuff that you can directly connect to the battery for efficiency just makes those all in one units stop charging every single time something directly connected changes it current draw!
But that little MPPT Charge Controller! I love it!
Thanks again.
(:
Some clear nail polish or even spray paint can act as a weather proof coating to give even more protection against moisture.