October 6, 20223 yr I've been using my Hybrid Solar system since we installed it in Aug 2020. The system includes a 5kW Phocos PSW-H Inverter with 12x400w panels and one Narada 48V LiFePO battery. I purchased ICC software then and have moved over to ICM 2 weeks back. I'm very happy with the software and can't imaging running my setup without it. Shortly after moving to ICM I connected a new Narada battery. I use my system as follows: By the end of the day my battery is fully charged. From midnight I switch to battery and this usually gets me through until after 6am with capacity to spare until the solar takes over. The load during those early morning hours are between 350 and 520watts, depending when the fridge/freezer turn on. My question is this: how accurate are the ICC/ICM battery usage readings and is my battery capacity correct? At 6am, my battery BMS read by ICM shows SOC 48.3%, with 52.6AH used. (This reading is consistent to those read by Narada's PC Software whenever I compare it. The Battery kWh used is 2.13 and total kWh used is 2.15kWh. According to Narada, this battery should provide 3.84kWh at 80% use (ie 20%SOC). For me, with my new battery of 13 cycles, if I continue to 20%SOC will provide the following: 2.15kWh/0.517=4.16kWh @ 100% discharge. This means I can only get 4.16*0.8=3.32kWh@80% discharge. I've contacted the supplier and according to the load test they done, the battery capacity is 4.53@90% discharge. The confusing thing is that based on 52.6AH used, according to the battery BMS, this equated to 52.6AHx48V=2.52kWh. I would expect this to should on the software. Maybe I'm missing something? Can anyone else check what they're getting using ICC/ICM with Narada or any other brand under similar setup? Edited October 7, 20223 yr by Jonsfield
October 17, 20223 yr Hi Jonsfield I have the ICM software connected to an AxpertType inverter and a Hubble AM2. I had to order a specialized cable to connect the the ICM pi to the Hubble battery. This mean the battery data is read directly from it instead of via voltages.
October 17, 20223 yr Hi @Jonsfield... Hoping my experience with my setup, similar to yours can help... I previous had an Axpert and have now moved to a Sunsynk with my two Naradas and can confirm the same issue carries across and this is a Narada BMS issues as experienced by a few others on this forum. If you dont fully charge your batteries to float for a few days in a row, the BMS SOC reading falls out of sync. ICC / ICM will read the SOC from the BMS (as does my Sunsynk) and this is not a fault of the programs but rather the batteries BMS. The way to get it back to "normal" is to charge your batteries to float... I had to do mine yesterday in prep for increased load shedding and it took almost 3 hours for them to float. In summer this is normally not an issue as your PV will hopefully fully charge the batteries but you are most likely experiencing this issue now as with the second battery connected, you are not getting a full charge. If I can, do you have a link to the software you are referring to for reading the battery.
October 17, 20223 yr Also, something to check... Are you batteries talking to each other correctly? What do you see in the BMS info tab?
October 25, 20223 yr @Jonsfield... So I was incorrect in my thinking above. I have had to move my batteries off direct comms and via ICM for reasons I wont worry you with but I am now seeing exactly the same problem as you. I have contacted Manie about the problem and he is normally very good in fixing these sort of issues quickly. I will let you know the outcome
January 8, 20233 yr On 2022/10/25 at 12:56 PM, Jay-Dee said: @Jonsfield... So I was incorrect in my thinking above. I have had to move my batteries off direct comms and via ICM for reasons I wont worry you with but I am now seeing exactly the same problem as you. I have contacted Manie about the problem and he is normally very good in fixing these sort of issues quickly. I will let you know the outcome How did you achieve 7500 cycles ?
January 8, 20233 yr 11 hours ago, zivva said: How did you achieve 7500 cycles ? That is the BMS going wonky!!! Pack 1 should be just over 500 now and pack 2 around 350, not 7500 🤣
March 26, 20233 yr Hi Guys, On ICM my narada batteries voltage differ between the inverter values and bms values. Inverter shows 54.6v and the bms shows 52.6v. On both the soc is 100%. ICM uses the inverter batteries voltage to charge the batteries. So which one is correct?
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