August 11, 20233 yr Hello Everyone I have recently purchased the following inverter.: https://onlineshop.gcsolar.co.za/product/growcol-vm-3k-value/ It came with a Pylontech UP2500 https://onlineshop.gcsolar.co.za/product/pylontech-up2500-2-84kwh-li-ion-solar-battery-24v-can-connection/ And the cable set https://onlineshop.gcsolar.co.za/product/cab-pk-pylon-lv-for-c/ I'm connecting it to a 545W Longi Panel. However even using the User settings and setting a Bulk charging voltage of 27.6V and a Floating charge voltage of 27.0V. I'm still getting issues charging the battery. I have tried creating a BMS cable for the inverter as the one provided in the cable pack does not work. I have been able to communicate with the inverter using MultiSIB Control. And the inverter detects the battery as 87%-88% full, most likely due to the voltage of the battery, however on the Pylontech it is only about 50% full. I have also tried the below links to make a suitable BMS cable but nothing works. Can some assist in this regards. The inverter is the same/similar to an Axpert Mks3-24V. Thank you.
August 11, 20233 yr Looking at the data sheet charge volts is 28.2 to 28.8v but recommended float and bulk volts 28.4v so your float charge in use mode is to low .
August 12, 20233 yr Author 9 hours ago, GMAC said: Looking at the data sheet charge volts is 28.2 to 28.8v but recommended float and bulk volts 28.4v so your float charge in use mode is to low . I shall change it, although this is one of those inverters with the floating charge bug it would seem as well. It's just the same as the Axpert and Kodak and so on. Just a different casing. I still want the BMS to communicate with the inverter as the battery SOC indicated on the inverter doesn't match against what is shown on the battery itself.
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