I have a walkway light by a solar light string:
https://www.amazon.com/gp/product/B07DVZBXQT/
3.7 volts, i think
Minnesota's too dark to keep it lit long, but i have a couple of other strings with identical solar panel & battery packs, so i thought i would add them in parallel and position them higher to get longer illumination. At first i thought to simply put 1/8" phone jacks on the sides to chain them, but i wonder if phone jacks would stand up to ice, rain & sun?

Can anyone suggest more weatherproof low voltage jacks?

And wire with more weatherproof insulation, what should i look for?

 

Try automotive connectors. Usually the individual wires are sealed against the housing, and the housing is sealed against its mate.

 

Or you could get these - https://www.homedepot.com/p/Grease-Cap-Kit-for-Valves-4-Pack-57002/100052608
The automotive connectors are or were kind of expensive.

 

Try automotive connectors. Usually the individual wires are sealed against the housing, and the housing is sealed against its mate.

Regular automotive spade connectors can be fitted with a rubber "boot" - its not really all that weather proof, but with no connector block, there's not much chance of tracking leakage paths. silicone grease or spay keeps corrosion down to a dull roar.

 

Regular automotive spade connectors can be fitted with a rubber "boot"

I took it to mean connectors like the Delphi 'Weather-Pac'. The industry standard of water proof automotive connectors. So good most of the aftermarket use them for their products.

 

Yes, I meant the Delphi type with annular rubber seals.

I have sourced from eBay from China (<1 USD each) or Delcity for stuff (https://www.delcity.net/store/Wire-Connectors-&-Quick-Splices/). I suspect there are other distributors like Delcity; I just have no experience with them.

Whatever source you choose, it will be less than from a car dealer. I also prefer to crimp my own pins,* so if you harvest connectors from an auto junk yard (as I have been known to do), you can get the connector pins online and save.

John

*If you don't, your solder or crimped splices need to be weather proof too.