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I'm in Pennsylvania, but thanks for the offer. It appears that the ones in my panels and diodes in the link you sent me are both TO-263, so I assume the dimensions are the same!

If the original is rated for 30a, why would I replace it with a 15? Asking because I don't know.

I need to find replacements but am not having any luck. Also, any recommendations on the best way/tool to solder these, soldering iron or gun, or is there something better, (spot weld) (I haven't done anything like this for over 20 years)

So reviving my thread, i've decided to replace the diodes in my bad panels. I scraped away the goo inside the junction boxes, my panels have the square shape diodes. The part#'s are PEC 9416 SB3045DY When i search the full part# i get links to Chinese companies, as far as I can tell these are...

So is this most likely a diode issue, I don't know what else it could be. Yeah, I'm gonna contact the seller. I'm not expecting much though.

Dupe

Received my Elejoy solar panel multimeter, so I'm back at it. Testing conducted between 1115-1135am and 1200-1215pm, 245pm sunny with some clouds. Readings from some of the panels that were giving me low voltage (27v) Pmax 175.5w 188.5w 208.6w Vmp 22.86V 20.91V...

I bought the panels from him 2+ years ago, so I'm not expecting much

Wheres a good place to get bypass diodes? I sent a message to Q cells asking for diode specs, but haven't gotten a response yet.

Ordered an elejoy

Do you have a recommendation for a tester? I have the guys facebook page, his phone# and address, I'll get ahold of him! I just want to know everything that i need to know, have my ducks in a row so to speak, before I contact him.

10:15-11:30 Tested 36 panels in my South array, voltages where all relatively the same from yesterday. 22 panels in the 27v-28v, 8-9a 1 panel around 32.5v, 8-9a 13 panels in the 40-42v, 8-9a Amperage when i started measuring this morning was around 7.6a, and increased up to 9a by 11:30, i...

Can't see the diodes

$114

All you can see is epoxy

Checked the voltage on all 72 panels. 29 of them are around 28v, the rest are 40v-42v. Partly cloudy day. New clamp meter is coming today, so I will short them and test the amperage tomorrow. These panels have 3 junction boxes on the back. Are there diodes in all 3, or just the center one?

So is it safe to assume that the panels putting out 41v are good to go?

Well that is a super inexpensive clamp meter.

I need a new meter HD and Lowes are nearby, So my options are Klein CL800, CL700, CL445, CL390. Or Fluke 323-LW Old meter got used on a fence charger, replaced the fuses, still doesn't work, so something other than the fuses fried!

Q-cells Q Plus DUO L-G5.2 360w

From my understanding they get them by the container.

They are covered in epoxy resin, Guess i could scrape it out, but what are the chances i damage something?

Mostly clear sunny day with light clouds Went to start wiring up my panel strings. Was checking the voltage (voc 46.8v) and on a 3rd of the panels i tested i was getting 20v/28v the rest of them i was getting 40v/41v (I tested 18 of my 72 panels). I replaced the mc4 connectors on one of the...

I would have had to up size my wire to #6 to keep the voltage drop down. #8 was getting to close to 3% V loss for my liking. Unless I'm mistaken, sol-ark 12k pv inputs limit you to #10 wire.

Inverters have 2 inputs per mppt, thats where they get combined.

I'm thinking #2 is going to give me the best production in the afternoon!

I'm either going to move that tree or cut it down, its too close to my fence, and absolutely will cause shading.

Or i could do it like this, don't really think there is a benefit to it though.

I'm not combining my strings, they go directly to the Inverter. If i do it like the second picture, it will keep my wire runs closer to the same length.

Recommendations for best way to create my strings (9 panels per string, 2 strings per mppt - Sol-ark 12k) Arrays are facing south, those trees are to west running south west south

Anyone have thoughts on the ATS question or AC combiners?

I was referring to how far apart the arrays are from each other.

Thanks, I did the math for my latitude, taking into account the angle of the sun during the winter solstice. My only concern is shading from those trees to the west and the best way to string the panels.

25'-30' feet