joe37

Hi Jumper, thanks for this. Mind sharing where you got the info for the bms alarm triggering at 42V etc. ?

Thanks, yeah I figured when comms is working I shouldn't have to worry. Was just wondering in general to further my understanding of relationship between SoC and voltage specs. Do you know if these inverter settings will also be automatically set by SA once proper comms is established? If not do you or anyone here know if these settings are optimal given the battery specs? (Mostly curious about "Shutdown", "To grid" and "Back to battery" values)

Good to hear. My cable is on its way. Yeah regarding that (EDIT: To be clear, I'm using the exact same shoto you were using, with the exact same manual and specs) I'm not entirely certain what the different voltages mean necessarily. So from the screenshot of the battery specs you posted: I get what you said about it being prudent to work between the 45V and 56.4V specified, since that translates to ~2.8v to ~3.5V per cell. I also understand the 30/80% calculation you were doing here. Your question on whether those calculated values were accurate seemed to go unanswered though, specifically the 54.12V being just above the float voltage and if that can be regarded as 80% SoC. Did you ever manage to figure that part out or get some answers? But just in general, from looking at the specs provided in the manual, how would one determine the voltage range that corresponds to 0% - 100% for this battery? Can you really just take the upper charge voltage and subtract the lower discharge voltage and that's your entire range? Is this how it works for all LFP batteries? What does the float voltage actually refer to then? Because from what I could tell it seems that the measured battery voltage from the inverter, when the battery if fully charged, settles at 54V. But that would indicated the battery's SoC is 100% at 54V ? I'm confusing myself here Hope you get what I'm trying to figure out.

Hi I have a Shoto SDA10-48100, but the 5.12kWh version (16s if I'm not mistaken) along with an Axpert Max 7.2kw inverter. Very much the same setup and situation as this person: https://powerforum.co.za/topic/9997-3080-soc-battery-settings/ Apparently these two units don't communicate at all... I'm trying to figure out what the importance is of having the inverter talking to the BMS, other than getting a few parameters setup automatically and I guess getting an accurate State of Charge at any point in time. I'm also using Solar Assistant, although I still have to get comms working between SA and the battery. So I guess my question is: If I'm able to get SA to talk to the battery in order to better check and maintain SoC, is it at all necessary (other than the reasons I pointed out) to get comms going between the Inverter and BMS? If so why? I'm still relatively early in my purchase so I might need to look at swapping out one of these units. Hope it doesn't have to get to that point. Thanks!