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Interesting thread! @octal_ip , you said at the beginning the shine isn't a usb device but communicates with the SPF inverters via rs232? Does it use growatt modbus protacal over the rs232 to query the inverter and do setup? I want to make a simple embedded control to drop the charge current as...

Just spent a while down a rabbit hole researching this a bit, in a ideal world I'd monitor the load on the inverter, (which is also the load on the generator) and lower or raise the charge current accordingly. Problem I can see is one forum/GitHub said that the writes to the growatt registers...

Edit, don't worry too much, I have it talking via rs485 rj45 socket, I'll put some details on soon, ish! (Make sure you send hex from terminal 🙄)

Been messing around with this a bit today, I have 3x spf5000es, I connected my rs 485 adapter to pin 1&2 on the rs485 rj45 connector underneath but it just spews out data, I've changed the address to 9 and restarted but I can't get in to respond to any communication? Am I connected up right? I...

I was going to post about the same thing! I have a set of 4s CATL (out a Hyundai) batteries, I've split one so I have a 14s2p setup, used dsub cables cut in half and stripped back, these go to a junction box I made as each pair of cells share the same input to the BMS and there is a ntc sensor...

Thank you, I appreciate that, I have read through that document since I posted. The register detailed is the total charge current. As I have solar input too I'd like to just change the utility charge current so as not to restrict any solar power that might be available while the generator is...

Guess the easiest way to find it is to set a specific value then read the registers until I find it?! ?

Found the register that holds the ancillary charge current and can alter it easily, I've just got to check my MPASM CRC check i wrote for something else works with the 16bit modus CRC and i should be away. I've also contacted growatt to ask if there are any registers that shouldn't be written to...

Hi, Feel I'm getting somewhere now! Turns out was my mistake in realterm output, now I've persuaded it to send hex I get a reply. Dropping the charge current happens pretty much instantly as soon as you write the data, this is good 😊, would it do any harm to poll the load percentage every...

I know what you mean, I'd hope the registers are held in ram and written to eeprom on shut down 🤞

Hi all, First post here so please be gentle! I've got 3x growatt spf5000 running a 3 phase system (off grid) with a diesel generator and eventually 15kw panels. About 20kWh of storage. This is all to drive 2 milking robots, the load can change quite a bit, there is a large air compressor...

Thanks that looks exactly what I'm after! Could run it on a raspberry pi I assume? I just need to setup a simple bit of code to alter the charge current depending on load? Do you know what parameter utility charge is? I'd prefer to alter that so any any available solar would still be used but I...

Does anyone know about the insides of these? Only concern I really have is what the holding register is? I learnt the hard way that eeprom life is finite, if you write to it ever second you can wear it out quick! I would assume the holding register is in RAM but don't really know, I could ask...

I've got an rs485 adaptor so will have a play about with it, could always do zero cross detection on the generator incoming to pick up it slowing under load? But would prefer to do it from the inverters load monitoring. It's a shame they don't offer it as a feature, I can't be the only person...