6
SPECIFICATIONS
TROUBLESHOOTING
Model
CY1220-MT
Rated charge current
20A
Rated discharge current
20A
Rated voltage
12V/24V auto work
MPPT efficiency
Max:99%
Over load, short circuit protection
≥
1.5 rated current
No load current
＜
10mA
Over voltage protection
16V; ×2/24V
Voltage of stop charging
14.7V; ×2/24V
Discharge recovery voltage
12.0V; ×2/24V
Over discharge voltage
10.8V; ×2/24V
USB output
5V 1A
Working temperature
-35
℃
~+55
℃
Dimension of controller
131×99.5×29.5(mm)
（
L×W×H
）
Weight
300g
PROBLEM
CAUSE
SOLUTION
Charging symbol not
displaying even when the
solar panel is in the sun
Solar has been improperly
connected to the MPPT
controller
Reconnect the solar panel
ensuring that the positive
and negative terminals are
appropriately connected
Load icon is off
Battery is low, the load will
start when the battery voltage
is higher than 12.2V
Charge the battery
Load icon flashes quickly
Short circuit protection
System should reconnect
automatically
The MPPT controller will not
turn on
Battery is insufficiently
charged
Charge the battery
Battery has been connected
improperly
Check, and if necessary alter
the battery’s connection to
the MPPT controller
