February 20, 20233 yr We recently had a solar installation done at my primary residence. I was lucky enough to be given a relatively nice Li battery by my father in law as the were upgrading their system. The problem is, that none of the installers that have come by, have been able to configure the battery properly. As an inverter, I have the Sunsynk 8KW Hybrid and about 12 panels on the roof. Here are a few bullet points of information: The battery apparently does not have a BMS. So connecting to it as Lithium using Canbus does not work I cannot find a manual for this specific battery as Soltaro does not make the exact model anymore and they are non responsive via email The general consensus has been that we need to connect to the battery using the AVG Voltage setting on the Sunsynk If I switch the system on, it powers my entire house, as long as the sun shines i.e. it gets all power from the panels Yesterday I also noticed that the LED on the battery changed from flashing orange to being solid blue. I am assuming this means that the battery was fully charged. At this point it was consistently around 54V. When the sun disappeared, the battery started flashing orange after a few minutes and at 47.5V, the inverter started beeping I made contact with one of the installers, who said that they did not change any of the defaults, and won't be able to come back to take a look at it soon. So I thought I'd give PowerForum a shot. Can anybody help me with setting the proper values for the battery specs in the last picture?
February 20, 20233 yr I highly doubt it does not have a BMS, more likely you need the correct cable with the correct pinout Soltaro seem to have an SA specific support email address: [email protected]
February 20, 20233 yr 55 minutes ago, Sentinel said: Can anybody help me with setting the proper values for the battery specs in the last picture? you are back to using Voltage mode, which you are... the battery seems to comprise of 16 cells, hence the 51.2V Nominal Voltage... 51.2V / 16 Cells = 3.2V per Cells which is the nominal Voltage quoted for LiFePO4 cells... Float, Absorbption & Equalisation Voltages... ok Float should probably be 3.4V per cell, Absorbption probably 3.45V is not a bad number and same for Equalisation... basically LiFePO4 cells range from 2.7 or 2.8V totally flat (don't go that low...) probably 3V is the lowest you'd want to go per cell, so shutoff at 48V (3V * 16 cell) and up to 3.6V per cell, again, don't push this limit, between 3.45V and 3.6V there is nothing to be had, other than a shorter life for the cells in general... Float = 16 Cells * 3.4V = 54.4V Absorbption = 16 Cells * 3.45V = 55.2V Equalisation can be set to 55.2V as well, this won't run for long, since the current consumed by the battery, once it is full (at the end of Absorbption) would be dropping/have already dropped to very low current and thus the inverter should quickly go to Float mode... I'd use the following Shutdown : 48V Low Battery : 51V Restart : 51V I'm sure someone else may come up with different numbers, but these should be ok and not let you damage the battery... the current charge Voltage of 54V is a bit skraal and might not allow cell balancing to happen, hence the 55.2V above... Edited February 20, 20233 yr by Kalahari Meerkat typo
February 20, 20233 yr Author 6 hours ago, madness_za said: I highly doubt it does not have a BMS, more likely you need the correct cable with the correct pinout Soltaro seem to have an SA specific support email address: [email protected] I got in touch with Rubicon today, who as far as I know, were the original suppliers. They also confirmed that it has a BMS, but that it is not compatible with Deye/SunSynk. I am not sure if changing the pinout will help with this. To be honest I don't know that much about this topic at all. I mailed the Soltaro email you shared 3-4 time over the last two weeks with no luck. My main question was to try get the manual/pinout map for this battery from them.
February 20, 20233 yr Author 6 hours ago, Kalahari Meerkat said: you are back to using Voltage mode, which you are... the battery seems to comprise of 16 cells, hence the 51.2V Nominal Voltage... 51.2V / 16 Cells = 3.2V per Cells which is the nominal Voltage quoted for LiFePO4 cells... Float, Absorbption & Equalisation Voltages... ok Float should probably be 3.4V per cell, Absorbption probably 3.45V is not a bad number and same for Equalisation... basically LiFePO4 cells range from 2.7 or 2.8V totally flat (don't go that low...) probably 3V is the lowest you'd want to go per cell, so shutoff at 48V (3V * 16 cell) and up to 3.6V per cell, again, don't push this limit, between 3.45V and 3.6V there is nothing to be had, other than a shorter life for the cells in general... Float = 16 Cells * 3.4V = 54.4V Absorbption = 16 Cells * 3.45V = 55.2V Equalisation can be set to 55.2V as well, this won't run for long, since the current consumed by the battery, once it is full (at the end of Absorbption) would be dropping/have already dropped to very low current and thus the inverter should quickly go to Float mode... I'd use the following Shutdown : 48V Low Battery : 51V Restart : 51V I'm sure someone else may come up with different numbers, but these should be ok and not let you damage the battery... the current charge Voltage of 54V is a bit skraal and might not allow cell balancing to happen, hence the 55.2V above... Great thanks. I have tried this now and will see how it goes. Edited February 20, 20233 yr by Sentinel typo
January 31, 20242 yr Good day, Did you manage to get this battery working with your Sunsynk in the end? (about a year later, not sure if I am allowed to post on an old thread) I have been gifted this battery, and now I am trying to get it working with my Sunsynk. I tried to create a CAN cable for it, with no success. Not sure if all CAN protocols are created equally, but I did match the pin outs.
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