icenov
New Member
I'm also interested in using a battery powered microinverter instead of solar panels. The main reason is I've got a 5 kWh lead-acid battery from my ride on mower that is in the process of being replaced with LiFePO4 as per this thread.
So instead of wasting the capacity I am going to use it to provide an additional 5 kWh to my existing 10 kWh home battery. But the problem is that I can't connect another DC input - or mix battery types - into my existing system.
I received my 600 W grid-tie inverter today and hooked it up to the 52 V LiFePO4 battery back and so far all seems to be working as expected. I don't think you need to worry about frying the inverter using a battery, as it will limit the input current to whatever is needed for the max output.
In my case, the battery pack is about 50% SoC, with voltage at about 51 V.
Some photos of the system:
Note this is the mower battery pack waiting for a box etc. I'm using a Daly BMS with bluetooth, and a separate shunt/voltmeter in series.
I had to find a microinverter that could take up to 60 VDC as the LiFePO4 pack fully charged is about 58 V. Most others have a maximum of 55
or less.
As you can see from the screen capture, the battery pack is discharging at 641 W, so allowing for losses, I expect the microinverter is outputing 600 W. I see that occassionally the battery current changes from 12 A a bit (up to 12.5, down to 11.5).
So after operating for about 60 mins - so far all good!
So instead of wasting the capacity I am going to use it to provide an additional 5 kWh to my existing 10 kWh home battery. But the problem is that I can't connect another DC input - or mix battery types - into my existing system.
I received my 600 W grid-tie inverter today and hooked it up to the 52 V LiFePO4 battery back and so far all seems to be working as expected. I don't think you need to worry about frying the inverter using a battery, as it will limit the input current to whatever is needed for the max output.
In my case, the battery pack is about 50% SoC, with voltage at about 51 V.
Some photos of the system:
Note this is the mower battery pack waiting for a box etc. I'm using a Daly BMS with bluetooth, and a separate shunt/voltmeter in series.
I had to find a microinverter that could take up to 60 VDC as the LiFePO4 pack fully charged is about 58 V. Most others have a maximum of 55
or less.
As you can see from the screen capture, the battery pack is discharging at 641 W, so allowing for losses, I expect the microinverter is outputing 600 W. I see that occassionally the battery current changes from 12 A a bit (up to 12.5, down to 11.5).
So after operating for about 60 mins - so far all good!