Here’s my latest project:
I have had my 10kWp east/west PV with a Huawei Sun2000 inverter for about a year now, and have now (nearly) completed it with an ESS that will have the whole house on the AC Out side, including the (cFos PowerBrain) EVSE. The transfer capacity of the MP-II 3000 fits nicely with the 32 Amps that are available.
3 MultiPlus-II 3000, 2 batteries with 16 EVE LF280K cells each, JK Inverter BMSes, and a modded Lynx Power In are the main components.
The positive side of each battery has a NH1 250A fuse, because that one actually is rated above the expected short circuit currents the LiFePOs can produce (there’s 125A Mega fuses on the Lynx for the MPs). The cells are compressed with springs, because then one can measure their compressed length and calculate the force; probably overkill, but springs are cheap and easy to integrate.
On the software side, my grid meter that is interfaced via AMS reader is integrated via MQTT (venus-os_dbus-mqtt-grid), as is the PV inverter (where I wrote a perl script to read the values via ModBus and export to MQTT and then read it with venus-os_dbus-mqtt-pv) and the EVCC service that manages my EVSE comes via dbus-evcc. The BMSes are interfaced via dbus-serialbattery and dbus-aggregate-batteries, VenusOS runs on a Pi 4 with a Waveshare isolated CAN/RS485 hat. A lot of data points are exported to graphite so I can monitor every detail in nice colorful grafana charts 
The fact that this all works not only makes me happy as an IT guy who attended an EE school decades ago, but is also a testament to the openness and flexibility of the Victron ecosystem.
All that needs to be done now is for the electrician to connect the AC side of things, and we’re done. (The system is currently experimentally connected to one MP on AC-In on a 10A circuit to allow me to configure and test things, and it’s already working pretty nicely).
PS: did you know you can cut your 70mm² cables easily and cleanly with a sharp axe and a big hammer, in case you forgot to order appropriate cable shears?