User Manual

①Please reduce the number
of electric equipments.
②Restart the controller.
③Wait for one night-day cycle
(night time>3 hours).
WARNING：Risk of electric shock!
Make sure that all the power is turned off before above operations,
and then follow the corresponding inspections and operations.
6. Technical Specifications
Electrical Parameters
Item MY20 MY30 MY40
System nominal voltage 12/24VDC Auto
①
Rated charge current
Rated discharge current
Battery voltage range
Max. PV open circuit voltage
MPPT voltage range
Rated charge power
Max. conversion efficiency
Full load efficiency
Self-consumption
20A 30A 40A
20A 30A 40A
8～32V
100V 92V
② ③
(Battery voltage +2V)～72V
260W/12V
520W/24V
390W/12V
780W/24V
520W/12V
1040W/24V
98.3% 98.6% 98.6%
96.4% 96.6% 96.5%
≤30mA(12V) ≤16mA(24V)
Discharge circuit voltage drop
≤0.23V
Temperature
compensate coefficient
④ -3mV/℃/2V (Default)
Grounding Common negative
RS485 interface
5VDC/200mA(RJ45)
LCD backlight time Default:60S,Range:0~999S (0S:the backlight is ON all the time)
① When lithium battery is used, the system voltage can’t be identified automatically.
② At minimum operating environment temperature
③ At 25℃ environment temperature
④ When lithium battery is used, the temperature compensate coefficient must be 0,
and can’t be changed.
01 02 03 04 05 06 07
08 09 10 11 12 13 14 15 16 17
18 19 20 21 22 23 24 25 26 27
28
29 30 31 32 33 34 35 36
Clear up dirt, nesting insects and corrosion in time.
Check and confirm that lightning arrester is in good condition. Replace a new
one in time to avoid damaging of the controller and even other equipments.