18kpv/FB21 modbus specs

[goldserve]

This is a good read to see if all the registers are the same as what is implemented. https://www.dth.net/solar/luxpower/modbus/EG4-18KPV-12LV-Modbus-Protocol.pdf

Note some important things:

9. A maximum of 40 registers can be queried at a time. The inverter
   software groups the registers into 40 groups of 0-39, 40-79, 80-119 and
   so on. When querying 40 registers, the starting address must be 0 (0-39),
   40 (40-79 ), 80 (80-119), it is not allowed to query registers across groups
   at the same time, if you need to query the values of these registers 38-40,
   because 38-39 is in the first group, 40 is in the second group, so it must
   be divided into two query

[ant0nkr]

Hi, @goldserve
Yes. I know that limitation, however it doesn't seems to be working at all.
Like, bg-dongle-test - this beta-release requests exactly 40 registers, but, from what I could see it works even worse then I'm requesting by 125 Registers.