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Powerpole connectors are very good for this type of application. The standard 15 amp sizes will work fine with an 80 watt panel but you could always use a bigger size for greater physical robustness. Make sure you use the special crimping tool, or if you really want to make them strong you could solder the wire inside the barrel of the metal contacts. Also make sure you get the plastic part of the connectors in black and red so you never hook your panels up the wrong way.
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To take this just one step further,If you already know what Powerpoles even are then just configure the ones for your
Solar in a different PHYSICAL configuration than the ones you use for anything else.
What I mean is I use PowerPoles for Ham Radio connections for power in the standard side by side with Red on the right as per ARES standard.
For
Solar use I stack then Red on top of Black instead.
This way I can not plug something in expecting to see 12vdc to the output of the panels which can be higher for sure.
They also sell the plastic connector bodies in several different colors so you do not have to use Red/Black for this use.
I would and just stack them differently.
The problem with the Powerpoles under 75 amp is they will just
fall apart under the
weight of the wire if not secured with a wire tie or rod of some kind,not really what you want for a Solar connection.
I use Nuetrix connectors and they have the added benefit of being air and watertight and have no exposed contacts that can short at anytime.
I use the Speakon and Powercon depending on which I have in stock when I need them.
They also have a positive lock mechanism and trust me they will not come apart unless you want them too.
They also provide a cable strain releif which again the Powerpole does not out of the box.
Ed