Thanks all the contributors here, certainly a massive help!
I'm doing this slightly differently, and for another use case, using a microchip ATMEGA4809 and common line driver circuitry similar to what most are referencing, all at 5 volts.
To the point: The Deye machine I'm developing off.
MODEL NO: SUN-5K-SG01LP1-EU
MAIN: Ver 0-3381-1515
HMI: Ver 0000-C35D
What I've found: T568B
BMS 485/CAN:
B-/Pin 1(orange/white), A+/Pin 2(orange), Pin3/Gnd(green/white).
METER/METER:
B-/Pin 4(blue), A+/Pin 5(blue/white), Pin3/Gnd(green/white).
Hopefully helps, I doubt this is the latest firmware, so you might have to split out with the battery.