SwitchDoc Labs SolarMAX2 Assembly And Testing Manual page 21

Step 4) Complete the rest of the wiring for SolarMAX2 according to the table below:
SolarMAX2 Wiring List
Step # Device From
W1 12V Lead Acid
Battery
W2 12V Lead Acid
Battery
W3 Part B -
SolarPanel MC4
Plug Plus
W4 Part A -
SolarPanel MC4
Plug Minus
W5 USB Plug w/
Terminals
W6 USB Plug w/
Terminals
W7 Part C - INA3221
W8 Part C - INA3221
W9 INA3221
Now we move on the Grove Wiring table.
Page 19
Version 1.1 September 2021
Device To
+ terminal Part C - INA3221
- terminal Part D - Solar
Controller Board
+ Part C - INA3221
- Part D - Solar
Controller Board
Part D Solar
- Terminal
Controller Board
INA3221
+ Terminal
IN1- Part D - Solar
Controller Board
IN2- Part D - Solar
Controller Board
Part D -Solar
IN3+
Controller Board
Instructions
IN1+ DON'T CONNECT
TO BATTERY.
WAIT UNTIL END
OF WIRING
BATIN -
IN2+
SOLARIN -
OUT1 -
IN3-
BATIN +
SOLARIN +
OUT1 +