Recent content by tweekzilla

OK so I'm trying to work out if my growatt 12000 has CANBUS or not. I cannot seem to get it to work at all with a pylontech type battery. Has anyone who has one of these inverters tried using CANBUS? I've even tried probing all the pins to see if I can see the 120 Ohm termination resistor...

Yeah I think we are golden except for the "custom code" bit. I'm pretty sure my 12000T DVM does not have CAN (even though growatt says it does). It does have RS-485 but the pylontech protocol is not as clear as the CAN. I'm trying to work on a python script that talks RS-485 to the growatt...

Those are useful!. I'm not sure though how the Growatt talks via RS-485. Whether it requests information from the pylontech or the pylontech just spits out out once a second similar to the CAN protocol. I think I'm going to have to have to some packet sniffing on the growatt to see for example...

Well Damn - Good idea @RobertGreen. I just measured the voltage across the shunt and plotted it. Looks like the Batrium shunt is crapping out at about 40A....Probably time to ping customer service unless anyone has seen this before and it just needs a calibrate?

I know from my utility meter and what the growatt reports that it really is ramping up the power. I mean it could be the batrium shunt but it seems pretty accurate all the way up to the 40A number (and does report at least -80A when I'm running the AC)....And yeah - if it's dumping 1-2kW...

I started a discussion here regarding an odd discrepancy between my batrium shunt and charging on the growatt 12000T DVM: https://diysolarforum.com/threads/odd-inefficiencies-in-growatt-12000t-dvm-unit-vs-batrium.29954/ I thought I would ask here to as I'm now into the troubleshoot phase. It's...

Charging question using a GROWATT 12000T DVM and Batrium. I've been upping my charge current from the grid each night on a new system. I started off at 30A and moved upto 60A (into a 280aH LiFePo). I noticed that power usage by the inverter changed each night from 2.8kW at 40A, 3.6kW at 50A...

Yeah I tried that raspberry pie option. Checked the can is sending out the right stuff, connected to bms port and set to option L52. No joy for me. Don’t suppose anyone has the rs-422 pylontech protocol?

I think to answer my own question it cannot live outside per say. Mine is "outside" but in a lean-too shed I built on the side of the house so weatherproof

@Joe BoyKey Can you share any info you have. I'm struggling to get either CANBUS or RS-485 working. I'd like to either connect it upto a pi or get batrium working over CANBUS. So much confusing information about pinouts and whether to use the RS-485 port or the BMS port so any tips would be...

So whilst I'm struggling to get anything out of either the RS-485 and canbus on a SPF 12000t I noticed on the growatt website that they *may* have settings for TOU and load-shifting (see image). Now my growatt dongle has been a bit hit and miss but this may be one way of switching between the...

Jumping in here. I'm trying to integrate a batrium with a growatt SPF 12000T DVM over canbus. I read that you need to set the setting to L52 to use canbus although I'm not sure mine has that. Does anyone have the protocol docs for either the pylontec RS-485 protocol or what growatt is...

Ok can anyone help me understand the priority/setting of the batrium charging profile. There's basically 4 control parameter that seem to control the charging - Note I am setting this up for a 16s LiFePo4 setup Cell Hi Cutoff: 3.65 Supply Hi Cutoff: 58.4 (3.65*16) Shunt Hi Cutoff: 58.4...

I could but I don't have anything right now to dump the power into....except the inverter hence the chicken/egg problem :)

Yeah it's just a threaded rod - If it's not permanent then I don't think it's a big deal. I could maybe move them but not compress initially, do a discharge via the inverter one time and then compress again whilst in a low state. It's just that "woah don't do that they will permanently deform"...