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Weize MPPT programming for LiFePO4

ruiz.manuel94

New Member
Joined
Nov 16, 2021
Messages
22
Hi everyone.

"Questions in the end, feel free to answer only some. Disclaimer: Me be noob"


I bought this MPPT (40 A version), which appears to be very decent for the price, however I am having a little trouble programming it and there isn't much info online.

According to the manual, these are the charging modes:

1640972346130.png

So right now I have "LI" selected, however, that doesn't seem to be in accordance (i.e. no "float" voltage) with what another thread by Will Prowse says about charging parameters:

12V 4S LiFePO4 Battery w/ BMS:
  • Absorption: 14.5V
  • Float: 13.6V
  • Inverter Cut-off: 10.7V-12V (depending on size of load and voltage drop etc)

I am considering to use the "USER" charging profile if needed, however I don't know what parameters should be set.

When you get into the settings menu, these are the only parameters you can set for the USER profile (the first image misleadingly seems to suggest there are more):

1640972622256.jpeg

Questions:
1.- Is the LI default profile good to go?
2.- Is BOOST voltage the same as ABSORPTION? (terminology-wise)
3.- Can you provide a link where it explains what all of these things are?
4.- How would you set the five parameters?

Notes:
  • Battery bank is 12V DIY from four 230 Ah LiFePO4 cells with a Daly 150A smart BMS
  • PV is three 160W panels in series
 
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