I have a solar shed I've built with an axis PoE camera, an 18Ah battery, an MPPT 75/15, a gl.inet slate router, a raspi4b+ and a single 150w solar panel. I don't expect this setup to be particularly complex or cumbersome, it's sole purpose is to just keep that camera alive. The slate is providing wifi connectvity to the system and is powered via usb, like the pi4.
I managed to get everything connected and working, but I have several questions, and I thought a sensible approach would be to put them all in one place, as I wager I am probably not the only person who would ask this sort of stuff, and having all the answers in one place would not only help me out, but anyone else who lands here from a google search looking for the same.
- I'd like to know how to change the MPPT 75/15 settings. As I understand it, it's possible to tweak the high/low battery cutoff points, but I can't figure out how to do that from the main 'touchscreen' interface.
- I would like to install the grafana packages so that I can get those amazing charts and graph power in, power out, consumption etc - one of the challenges I have now is that the system runs out of juice some time after 3am and doesn't come back online until nearly 1pm, so to figure out what the issue is, I need to see things like 'when does the panel stop feeding the battery', 'what are the voltage cutoff points', etc.
- Understanding the pi4 isnt supported (yet?) by victron, having gotten ssh access to it, I noticed it doesnt have apt installed, only opkg, and some of the opkg sources aren't there - it looks like its trying to fetch software updates from a url that 404s. Is there an update I can plug in?
- I am totally comfortable at the command line, is there a cmdline utility available to get the raw data from the ve.direct interface? barring the ability to install grafana/docker/etc, I am totally happy just scripting something up to spit out some json and handing that to observium (its another graphing tool) and calling it directly via http or something.
Thanks in advance!