Solar panel charging cable specs & length

I have the Bluetti 200p max and the expansion unit. I will be purchasing 800w flexible solar panels to mount on my van roof. I’m going to need at least a 15’ solar charging cable. The Bluetti maxable length that I found on Amazon is 6 ft. So I plan to search for a different brand. What other spec should I be aware of when looking at other brands? Thanks

Nimm Kabel mit 6mm² Querschnitt. Der Hersteller ist egal.

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There’s plenty of choices for 10 gauge wire, with or without MC4 connectors, on Amazon. Just make sure the solar panel connectors are MC4. Looks like around $30 for a 20’ pair of MC4 cables.
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You can also make your own cables but you’ll need a wire crimper and wire stripper. Installing the MC4 connectors is fast and easy with these tools. I’ve done it in the dark while juggling a small flashlight, because I didn’t want to wait until the next day.
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On a side note, 800 watt flexible panels look shockingly expensive, but I suppose you don’t want to mount more permanent panels up there like RV owners do.

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