BougeRV BJ4880F - MPPT Introduction; Introduction of Lead Acid and Lithium Battery Charging

17. Introduction of lead acid and lithium battery
charging
16.1 Lead-acid three-stage charging
16.2 Lithium battery charging
Dawn
Evening
Night
MPPT
EQU/BST
FLD
EQU_V
BST_V
FLD_V
Voltage
Current
MPPT
EQU/BST
FLD
Dawn
Evening
Night
MPPT
BST
BST_V
Voltage
Dawn
Evening
Night
MPPT
EQU/BST
Current
Dawn
Evening
Night
20 21
16. MPPT Introduction
MPPT is the abbreviation for Maximum Power Point Tracking. Due to the following
characteristics of photovoltaic curves, when using photovoltaic energy for charging, it is
hoped that the following Work Points can be traced.
12.1 The photovoltaic power generation is particularly affected by external factors, so
selecting the appropriate installation location and angle is particularly important.
12.2 Photo voltaics are more sensitive to temperature changes, as shown in the figure
below (the higher the temperature, the lower the open circuit voltage Voc, and the
total output power changes relatively little).
Voc
Power(W)
Voltage(V)
Current(A)
I-V
P-V
work point
Voltage(V)
Voc
Power(W)
Current(A)
Voltage(V)
Voc
Power(W)
Current(A)
Weak Light Strong Light
I-V
P-V
work point
I-V
P-V
work point
Voc
Power(W)
Voltage(V)
Current(A)
Tem++
Tem–
I-V
P-V
work point