PNGKNYOCN DC Power Plug Adapter,2Pcs DC 8mm Male to DC 5.5mm x 2.1mm Female and 2Pcs DC 5.5mm x 2.1mm Male to DC 8mm Female Connectors（4-Pack）

Very useful adaptors for my solar panels.

Does the job great

Working great so far and you get two sets of two different connectors. They still hear up though! I'm using a 2x130w panels with a total open circuit voltage of 44v. Both the lead coming from the panels and the lead to the power station don't heat up, only the connectors. So if you're using a panel or panels with this adapter you might be better off running a USB fan (like I do) to cool the adapter down😉

Saved me on buying another extention lead

I have a Goal Zero solar panel, and they come with an 8mm port, which is most frustrating. However, the 8mm female to 5.5mm adapter works perfectly, and now I can use that panel with all my small solar generators. It would be nice to have the option of only buying an 8mm to 5.5mm, or a 5.5mm to 8mm adapter, because I do not need two of the adapters, but that's the only negative I can think of.The value for money is great, and so far the adapter is working perfectly. As with all these things, time will tell.