PV to THNN/ THWN connection

[badwithusernames]

I would think that a basic weather proof junction box with grommet entries for the wires and either a terminal block or split bolt connectors would work.

Again that kind of detail is usually on the permitted electrical drawings.

My drawings show the 8x8 weatherproof box location, just not the connector type. The Bundy connectors look solid, so I think I will look for them locally before mail order.
Thank you all, this site has proved invaluable to search and get solid answers when I'm stumped.
SD

[SunEagle]

The system is three strings from a barn roof, feeding two inverters in the house basement. 2 strings to one and 1 string to the other. The strings are 10 wire, and I have 65' of buried 1" pvc conduit. At some point in the future I may upgrade to a single inverter with more MPPT (sunnyboy 7.7) so I want to have each of the strings run all of the way to the house. The connection is where the conduit comes down from the roof and transitions from PV to THWN to run underground. So, as I am not combining strings, I was hoping to not use a combiner. Typically I think a DC disconnect here might do the job, but my DC disconnect is in the basement with the inverters. The plans examiner said as I have the Tigo RSS it would be redundant to also have a manual disconnect there.
Let me know what your thoughts are, this is my first time doing this solo, and it's a lot to learn.
Thanks, SD

I would think that a basic weather proof junction box with grommet entries for the wires and either a terminal block or split bolt connectors would work.

Again that kind of detail is usually on the permitted electrical drawings.

[badwithusernames]

The system is three strings from a barn roof, feeding two inverters in the house basement. 2 strings to one and 1 string to the other. The strings are 10 wire, and I have 65' of buried 1" pvc conduit. At some point in the future I may upgrade to a single inverter with more MPPT (sunnyboy 7.7) so I want to have each of the strings run all of the way to the house. The connection is where the conduit comes down from the roof and transitions from PV to THWN to run underground. So, as I am not combining strings, I was hoping to not use a combiner. Typically I think a DC disconnect here might do the job, but my DC disconnect is in the basement with the inverters. The plans examiner said as I have the Tigo RSS it would be redundant to also have a manual disconnect there.
Let me know what your thoughts are, this is my first time doing this solo, and it's a lot to learn.
Thanks, SD

[SunEagle]

If you have more than 2 parallel "strings" you will need a combiner box which usually has the proper terminal blocks that allows you to connect those wires.

If only one or two large strings then you have to make sure the terminations are rated for the higher DC voltage each string can produce.

Tell us more about what your system is and we can help direct you to the proper terminal blocks.

[littleharbor]

Why not a transition/combiner box?

[foo1bar]

I'll second burndy unitap.

split bolt may also be possible to do in a code-compliant way. But doing that right I think requires a lot of taping, and I think with different types of tape.

[Ampster]

Here is a link to a Burndy product. The first page is the expensive ones. Scroll down for the smaller ones. Home Depot has similar ones for less.
https://www.amazon.com/Burndy-BIT2-I...ustrial&sr=1-3

[badwithusernames]

I have a connection to make where my strings come off the roof and into a 100' pvc conduit to the house. I have #10 PV from the panels, and #10 THWN through the pvc to the inverters. What is the preferred connector? I have seen some people use wire nuts which looks awful. Several clean looking installations that I have looked at used nice insulated set screw butt connectors with dielectric grease, but I've been unable to find a manufacturer or product name. The electrical supply counter guys are less than helpful.
And advice is much appreciated.