raymondtrueman

I dont see any significant discount per say on the page, this is the price it has been... Unless I am mistaken

Thanks, I actually know what you need because I had done some research while looking at the BMV. You need to connect the BMV to one of the below devices. They connect the BMV via WiFi/Ethernet to the internet and upload your readings to the cloud constantly, and then you can login on to their portal or app to view all the data and charts: https://www.victronenergy.com/live/venus-os:start Pretty cool and probably worthwhile if you want to monitor everything and have history data to work with I live in Johannesburg btw

Would you mind posting the data from one of your charge cycles? Not from the MUST though but from the BMV if that is captured...? I am curious to see what it looks like I will also order a BMV and a balancer - seems like handy investments

Sorry That was a mistake, I meant to say bulk. Yes since I got it, the mains went off 5 times and not once did it charge above 27.4V. My total load is small - max 350W but more like 200W average. Maybe the battery does not drain enough to trigger a full 4 stage charge cycle. The lowest was around 25V. Next time I will keep the mains off until <24V and then see what it does. I have added a the load to my previous chart if you want to see it: Sept 1 - Batt Voltage and Load I have all settings on the default settings shown in the manual. I don't really see any settings for utility and total charging limits other than the ones we discussed here Thanks for your help. I will report back when I have some more data

I scanned the manual and attached it here. When you look at it on page 18, the setting I am talking about is number 21 called "Battery stop charging voltage when grid is available". Now that, to me, seems like it is going to stop (absorption maybe?) charging when the voltage reaches 27V seeing that I am only charging from the grid and don't have solar. So charging starts from 25V after a load-shedding session with absorption, and then reaches 27V and stops due to this setting, ignoring the absorption setting of 28.8V. And then either it keeps charging and stopping to remain at 27V (hence orange light persistent flashing) OR it enters float charging mode, which also has a setting of 27V immediately after it stops at 27V. This theory also matches what we see in the graph I posted. But I might be wrong. I am so confused even after reading the manual. On page 26 they show how the charging cycle works but seems like the absorption voltages are wrong in that table at 25V (typos?). Anyway, please have a look through this manual and let me know your thoughts. Thanks Must 1-3kW Inverters PDF P.S. It is the "MPPT-80A" version when the manual refers to a model

I have a hunch that the “Battery Stop Charging” setting might be to blame here... It’s default value is at 27V. Is it not preventing the absorption cycle from reaching 28.2V+? Because it cuts it off at 27V And then goes into float immediately after, which is also at 27V...

No, the light is off during the load-shed - sorry I should have mentioned that. I meant while the grid is on - the light always flashes orange, it never goes to a solid orange Settings are as follows (all left as default from factory): Float: 27V Absorption: 28.2V Battery high: 30V Battery Low: 20.4V Grid Max Charger Current: 20A Battery Stop Discharging: 23V Battery Stop Charging: 27V Maybe why the charging light keeps flashing...? "Instantly" according to the chart is around 2 minutes - so not really that instant. Is 2 min acceptable to make that climb? There are a few current readings from the monitoring software but they all go to 0A as soon as the grid power is back on or not relevant to charging. There is a "battery charger current" but I am pretty sure it only indicates values for solar charging because its always 0. On the screen itself there is no charge current reading. I have a multi-meter but to connect that in series will be a bit of a mission

I have a new 3KW clone inverter produced by Must Power with a 24V Battery bank consisting of 2 brand new 100Ah AGM batteries. It is not connected to solar and charges from the grid. I noticed its charging light flashes orange 24/7 non-stop. Usually with these Axpert-type inverters when it finishes charging it should enter floating charge mode and the light should stop flashing and turns a solid orange. This is not happening and I am a little worried that my batteries might get damaged due to a constant high charge current being applied to it. It may be because of the infamous charge/float bugs on some of these clones. Another thing I am not sure about is when the grid is cut-off the battery voltage takes big drop from around 27.4V to 26.2V in only a couple of minutes. Is this normal? Same thing happens when the grid power comes back on - it increases almost instantly to 26V. I have some charts below of the whole Battery cycle during 2 recent load-shedding events if that helps. Unfortunately the monitoring software does not monitor the grid charging current. Thanks for your help Sept 1 Load-shed - Click here for interactive chart Sept 2 Load-shed - Click here for interactive chart