I have the Solix F3800 with similar XT-60 input as the 767. I was thinking if one could use another solar charge controller for 48V batteries, there are inexpensive ones that take Voc input up to say 150V, and the output side would be providing about 50-56V to charge batteries - that would be a good input range for the Anker power stations. But I don't know what interactions there would be between one MPPT charge controller's battery charging algorithms, and the Anker input's MPPT controller, that might cause the Anker to not accept any power in.
Would be great to see someone try this ....
I've been away from these forums for a few months, as well as from F3800 forums, but some interesting things have transpired recently.
First, someone just successfully wired 3 305W (32.5 Vmp) in series (so 90Vmp) to a solar charge controller, and then fed the output of the solar charge controller into the Anker's XT-60 port to charge. Even better, the EASun brand controller they used wasn't limited to standard 48V Li-Ion charging profiles, they could set a user-specific mode and choose 56V as the controller voltage into the Anker. Also, the EASun controller turned on via power solely from the solar inputs, even if the Anker wasn't connected yet to the output ports - this might be key, as I'd heard most solar charge controllers wouldn't power on unless there was a 48V buffer battery attached, basically that they powered their electronics from the battery being charged (the Anker might not be able to provide power or voltage out of the XT-60 port, to mimic a 48V battery to the controller).
Second, in a recent new firmware update for the F3800, the 10A limit below 32V is apparently dropped, so people are able to use a greater variety of solar panels below Vmp of 32V without running into the 10A limit. Unclear how far below 32V this applies though, at some point above 12V they need to drop under 10A to not blow up cigarette lighter 12V fuses. But it certainly allows for more older panels in the 200-350W range that have Vmp in the 25-35V range, which in many real-world conditions the actual operating voltage is below the spec Vmp. This flexiblity might obviate the need to look into the solar charge controller in the first place.
Have any folks with the Anker 767 seen any recent updates like the F3800 folks have?
Even with the 2nd bit of news, I'm still somewhat interested in the solar charge controller to run panels at in series at >60 Vmp, for two reasons:
-reduces having multiple sets of MC4 cables coming down from the roof to the F3800, down to one, by running series rather than parallel, or
-higher voltage means less amps for the same power, which allows for smaller gauge (and cheaper) wire, and less voltage and power line losses, over the 30-50 foot runs I'm look at from the roof to the F3800. At some point, parallel wires have to come together, and 25A (20A for the 767) you need beefy and expensive wire. With the charge controller, you only need the beefy wire from the charge controller output to the F3800 input, which could be made a pretty short run.