gmelendez
New Member
I have 2 separate small installations with 800Watts and 1.2KW solar panels, Growatt 3000TL LVM, with Utility charging as well but obviously not feeding back to the utility company.
I'm using 2x LiTime 24V LiFePO4 100AH batteries in parallel and configured growatt for USE2 batteries type. In Installation 1 I tried setting the bulk charge to 29.2V (as recommended by the manufacturer) and 27.6V for float charge. But it kept changing the float to the same as bulk charge each time I changed it. I ultimately was able to change it via the growatt website interface but I never see it actually get to those levels so I got concerned and lowered it to 28 and 27 respectively. For Installation B, I was able to set the bulk charge to 29.2V and 27.6V for float charge, but I still see the same behavior of not reaching those voltages.
I'm not sure if the growatt just doesn't do a good job of reading the right voltage or not, but it feels like this causes unnecessary charging from the utility and SOC is not usable. Both these installations are used to power fridges and coffee makers, with some lights and a fan, so at night there shouldn't be any major draw (two separate homes). Any help is greatly appreciated.
Installation B
I'm using 2x LiTime 24V LiFePO4 100AH batteries in parallel and configured growatt for USE2 batteries type. In Installation 1 I tried setting the bulk charge to 29.2V (as recommended by the manufacturer) and 27.6V for float charge. But it kept changing the float to the same as bulk charge each time I changed it. I ultimately was able to change it via the growatt website interface but I never see it actually get to those levels so I got concerned and lowered it to 28 and 27 respectively. For Installation B, I was able to set the bulk charge to 29.2V and 27.6V for float charge, but I still see the same behavior of not reaching those voltages.
I'm not sure if the growatt just doesn't do a good job of reading the right voltage or not, but it feels like this causes unnecessary charging from the utility and SOC is not usable. Both these installations are used to power fridges and coffee makers, with some lights and a fan, so at night there shouldn't be any major draw (two separate homes). Any help is greatly appreciated.
Installation B
