Recent content by marky0

Thanks @SeaGal that was the critical bit of information I was missing. For some reason I got it into my head that the solis inverter would be using the measured battery current reported in CAN message 0x0356, but it makes perfect sense that it would use the maximum limits reported in CAN message...

I currently have three US5000 pylontech batteries working great with a Solis Hybrid inverter. They are not quite big enough for daily use, particularly in winter when I charge them overnight to run the home during the day. So thinking about upgrading by putting together a 15S pack of LF280K with...

That's a good shout, and I'll do that the next time I power down my inverter, but I have a nasty suspicion that all the modbus registers will be in flash. This will depend on the quality of the IC, it could be in the 1000s if they have gone a low cost route. I have some confidence if as per...

Like many others on the forum I am talking to my solis hybrid inverter (RHI-6K-48ES-5G) through Modbus daily. Mainly to set battery charge current to achieve 80% SoC overnight, or to enable export at peak export tariff times. But it occurs to me that Solis could be using flash memory to store...

I seem to have no problem talking to B/RS485 port while my A/CAN port is connected between my US5000 and solis hybrid inverter..... I use this github code and configuration. Maybe your inverter model is using RS485 and CAN, or its loading the RS485 pins at the inverter side. You could try to...

OK, so the results are in. I changed my inverter control parameters last night and left the pylon/inverter to do its thing. Here is what I observed. You can't set the "Equalizing Charge" below 54v on the inverter, and even when you do, upon saving the parameters it resets back to 55v. So either...

As I understand it the academic literature is still debating whether there is a significant degradation of LFP at charge voltages unless they are greater 3.6v [Ref]. But high charge voltages are certainly not good for NMC ! But I think Andy will agree with you that there probably isn't much...

That's understood, but I couldn't find any documentation on the control parameters menu. It doesn't even make sense that equalization and float voltages are on this menu when the inverter knows that an LFP battery connected. These are clearly lead-acid charge terms, but what you call them is...

Thanks for your replies ! I confirm I have the PYLON LV protocol set correctly and everything is OK on the information screen. It is possible to change all the settings on the control parameters screen (float, equalizing, over, under voltage) even when PYLON LV battery is set, but I haven't yet...

I've been doing a deep dive into my pylontech battery (three US5000 connected in parallel to a solis RHI-6K-48ES-5G-DC hybrid inverter). I had always assumed that the pylontech battery would communicate the correct charge voltage settings to the inverter through the CAN bus. But I am now not...

I tested out what you said this morning with mixed results. It seems that because I had a discharge time slot set that was the reason why the inverter exported the "back flow" power to the grid regardless of battery SOC. So I understand that a lot better now. Thank you ! The solis manual is just...

Sorry, typo, you are correct it is RHI-6K-48ES-5G (typo corrected in the post question), seems RHI-6K-48ES-5G is identical to your inverter S5-EH1P-6K, in all but name. @peufeu you are a genius ! Your reverse engineering has given me exactly the answer I was after ! 43074, just tested and I can...

Hi, the link to the modbus map you have posted appears dead. I am specifically interested to know if it contains the address to control backflow power. Do you have a saved copy you could upload ?

I don't quite understand what you want to do, but here is a video which describes how to control the solis inverter using modbus. Register 43141 controls the charge current when you enable battery charging from the gird (no solar). This modbus map shows a large proportion of the available...

I already control my overnight charging current from the grid to the battery by writing to Modbus register 43141. This means I can set a battery SOC by the morning to whatever value I want to within about 1%. I am assuming there must be a modbus register for backflow power. So once I know it...