Hey, so firstly the glass was fairly crack but no large bits of glass missing so the expanding and contracting will never be a but issue but if glass was missing in large sections I agree! The polyurethane I used drys almost like a silcon however, another great quality of it so hopefully this kind of issue shouldn't occur. Have used these panels in the heat multiple times with no signs of failure yet. Thanks for the question hopefully it helps people out!
Exactly the same roughly! Me being silly I forgot to take picture before, ughh dumb. But they read almost identical before and after. However after the resin was on the panel I was reading the full 200w of the panels so there was no loss!
The one I have used is more of an epoxy however like you say lots come in the varnish like form. I've not tried this on panels or really ever used it but as long as its weather resistant and fills the cracks I cannot see why that wouldn't be a viable option!
This type of polyurethane is not ment to, I have used it a few times and not noticed any type of cloudiness. These panels are portable and not constantly left in direct sun maybe if they were a more expensive resin would be a good option!
They sure are, not sure the reasoning behind it just means glass replacement is almost impossible... but doing this I picked up some really cheap panels so it's great for me!
Broken Solar Panel Glass Re...View Instructable »
Variable Lab Bench Power Supply!
The supply I used is 450W, but really anything 300W or above would be suitable. The LTC3870 goes upto 30V and 10amps, plenty of headroom for most electronics projects.Thanks for checking out my instructable, hope it proves helpful for you.
The 24V is coming from the LTC3870 module (step up step down converter). This allows the voltage to be adjusted up or down from the 12V input
Hey mate, I've used 16 Ga Wire and this is plenty of head room for my uses (Generally lots of electronics projects wont pull anywhere near this) However if you think you will need to pull over around 10amps for any reason i would suggest as said above maybe going up to 12 Ga or doubling up wire. Personally never pulled anything near this
Thanks for your comment update coming soon!
Thankyou! Honestly made my life 200x easier as a maker and looks great! Hopefully it also helps me getting more projects done! Its so simple and cheap everyone shoulkd have one aha
Hey Jim can you elaborate? Dont' quite understand :) Each set of voltages have there own gnd wire.
Agreed, might add this to my list of improvements. However heat has not been an issue at all yet!
Variable Lab Bench Power Su...View Instructable »
Weather Based Irrigation Controller
Tools and Materials for Arduino
ASCAS Hey Ive been attempting to make this however i cant find the L and R channels on my board can you help me? I'm so close aha just cant find them :(
DIY Supercharged Bluetooth Speaker (v2.0)