Mecer 2400VA Inverter (Community Support) - Part 2

Zuner said:
How far i've come, running full solar now, metering company even came to see why i don't buy units anymore.
Still have my lobo as a backup should i need it one day.
Click to expand...
Yup been running solar for almost 3 years now, my old mecer was given to a friend with the Royal batteries I bought in 2000. They were still working
 
Tjoker said:
Thanks @wingnut771 , was my config to high then? Set to above.

Im using this load balancer and batteries connected ins series:

View attachment 1791058

Currently "load shedding" myself for some testing.
Click to expand...
Check balancing when it is at max volts , just before it goes to float

The voltages you have set is a bit high

The BMS would have protected the batteries to not reach that high charge voltage

But won't always stop it from keeping it at the high float voltage which isn't ideal

If it prevents it depends on other factors
Edit sometimes it can, IE if the BMS disconnects charging circuit and allow cells to settle and only reconnects when voltage drop like if there is a outage again, but yea depends on the BMS and the way it works if it does not go into protection mode then you would be floating the batteries high
 
Tjoker said:
Thanks @wingnut771 , was my config to high then? Set to above.

Im using this load balancer and batteries connected ins series:

View attachment 1791058

Currently "load shedding" myself for some testing.
Click to expand...
Yes, those settings were too high. 14.6V is max voltage for LFP (3.65V cell voltage), you had them set to 14.8V. I recommended setting to 14.4V absorption as its not necessary to go completely max voltage for the internal BMS to balance the cells and LFP is fully charged with enough absorption time anywhere above 14V. Your float was also too high at 14.4V which is almost max voltage. LFP's resting voltage is around 13.4V so this is where you want your float voltage to be.
 
Before our load shedding between 20h00 and 22h00, I plugged in my main PC and the Hikvision NVR with cameras to test the load, like I had been running it before. The power went off, and the Inverter screamed and switched off. It did not come back on at all.....

Is one of my devices messing with the inverter?

Checking the load on the inverter when power is on, it bounces between 25% and 50% bar when everything is connected.
 
Tjoker said:
Before our load shedding between 20h00 and 22h00, I plugged in my main PC and the Hikvision NVR with cameras to test the load, like I had been running it before. The power went off, and the Inverter screamed and switched off. It did not come back on at all.....

Is one of my devices messing with the inverter?

Checking the load on the inverter when power is on, it bounces between 25% and 50% bar when everything is connected.
Click to expand...
Possibly, plug in one at a time to test
 
Lupus said:
Possibly, plug in one at a time to test
Click to expand...
I connected everything one by one, plugged in my main PC last, and could hear "whizzing" sound getting a bit louder. Everything stays on. I even simulated the power coming back on for 5 minutes before switching off, seems to be working now, so not sure what happened last night. Load on Inverter bar 25%-50%.
 
Tjoker said:
I connected everything one by one, plugged in my main PC last, and could hear "whizzing" sound getting a bit louder. Everything stays on. I even simulated the power coming back on for 5 minutes before switching off, seems to be working now, so not sure what happened last night. Load on Inverter bar 25%-50%.
Click to expand...
Maybe there was a spike when the power went off on the inverter side causing it to overload and switch off.
My old one did that once and beeped at me, the sudden voltage change caused it to "overload" and it was just my monitor, router, laptop and light plugged in.
 
Got my new Mecer LOBO IVR-2400LBKS from Geewiz yesterday. Hooked everything up for testing today.
www.geewiz.co.za

Mecer 2400VA (1440W) Inverter Battery Charger (UPS) - Intelligent Fan (12 Month Warranty) **23V CUT OFF**

NB - this unit is programmed at a 23V (11.5V per battery) cut-off. Therefore, using higher wattage loads with lead acid batteries will cause the inverter to shut off within a few minutes. Recommendation is to use with lower wattage appliances or with Lithium Batteries Mecer Inverter 2400VA...
www.geewiz.co.za www.geewiz.co.za

Load shedding myself since 10h00 this morning. Inverter is now handling the load with everything connected, but then this afternoon we started to hear peeping for low battery:

1738935736270.png

Looking at the battery it's sitting at 75%? Surely that is not a low battery?

I have since switched the power back on. Battery still 3 bars an hour later. Now I notice my Victron Charger is not doing its thing:

1738935870296.png 1738935810717.png 1738935953572.png

Something must be wrong with a reading/setting? I havent changed anything...

EDIT: The temp compensation setting was on, switched it off, and now its matches the Battery Balancer reading 26.6V
 
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Tjoker said:
Got my new Mecer LOBO IVR-2400LBKS from Geewiz yesterday. Hooked everything up for testing today.
www.geewiz.co.za

Mecer 2400VA (1440W) Inverter Battery Charger (UPS) - Intelligent Fan (12 Month Warranty) **23V CUT OFF**

NB - this unit is programmed at a 23V (11.5V per battery) cut-off. Therefore, using higher wattage loads with lead acid batteries will cause the inverter to shut off within a few minutes. Recommendation is to use with lower wattage appliances or with Lithium Batteries Mecer Inverter 2400VA...
www.geewiz.co.za www.geewiz.co.za

Load shedding myself since 10h00 this morning. Inverter is now handling the load with everything connected, but then this afternoon we started to hear peeping for low battery:

View attachment 1794440

Looking at the battery it's sitting at 75%? Surely that is not a low battery?

I have since switched the power back on. Battery still 3 bars an hour later. Now I notice my Victron Charger is not doing its thing:

View attachment 1794443 View attachment 1794442 View attachment 1794445

Something must be wrong with a reading/setting? I havent changed anything...

EDIT: The temp compensation setting was on, switched it off, and now its matches the Battery Balancer reading 26.6V
Click to expand...
Yea with light load , and low float setting the mppt can ramp down

Since the lithium doesn't dip deep enough to get out of float until the SOC has dropped quite a bit

Lifting the float voltage can remedy this

26.8v float minimum is what a 25.6v is recommended

I find having a float on recommended voltage can land me in premature float mode (have 48v system)

Having a float a touch higher than recommended helps prevent this
More related to a bug in axpert inverters
 
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