Hi,
I could build a LFP battery, but was unsure how to get an inverter and a charger to work in ESS harmony. Then googling around I bumped into the Multiplus II and CerboGX, thus realizing this whole design was not only commercially available in a neat package, but was actively supporting DIY ESS, going as far as releasing Venus software as open source. Honestly I was stunned, this is my first experience of a hardware commercial company choosing such an open approach - I’m guessing it might be a legacy of empowering off-grid customers who require complete autonomy in controlling their setup. Geez, even the documentation has a tone and sense humor I’ve not seen anywhere else 
I spent more than I had planned on the inverter/charger, because of the very specific open approach.
Anyways, I’ve been happily running a MP II based ESS since last summer :
MP II 48/3000 with ESS assistant, Venus on raspberry PI2, 100A JK-BMS with dbus-serialbattery connection, 16 x Eve 280 Ah LFP, array of 7 second hand PV 250 Wp panels / 4 APS YC500I micro-inverters, grid meter Shelly EM50 via MQTT.
Where does the power supply from the Raspberry come from? from the Multi? if it has to restart, your connection would be lost …
Nice cover for the small PE rail. 
Those are trained eyes 
Since the picture was taken, the raspberry is now powered from a DC 48V to 5V converter connected to the battery (with inline 5A fuse). Would update the picture, but the enclosure is very crowded with a mini fan heater (close to freezing here in Provence) and an unrelated file backup system (provides some secondary heat too)…
Still can’t get over noticing the PE rail insulator.
Then I hope that the Multi doesn’t hum so much on the wood … 
Nice little system … 
PS: simply build a false bottom over it …
I have to admit the humming is quite noticeable - luckily in outside shed so no nuisance, but way too cold in winter and a little too warm in summer 
Hello Pascal,
can you share your inverter and charger values (like dc shutdown /restart / alarm and absorption volt / float…) in the ve configure for your 16s 280ah battery.
That would help me a lot as i have more or less the same configuration.
thanks,