User Manual

Model
Rated Charge
Current
Rated Charge
Power
Max. PV Array
Power
Max. PV open circuit
voltage
MY20
MY30
MY40
260W/12V
520W/24V
390W/12V
780W/24V
520W/12V
1040W/24V
390W/12V
780W/24V
580W/12V
1170W/24V
780W/12V
1560W/24V
20A
30A
40A
92V
100V
①
②
① At 25℃ environment temperature
② At minimum operating environment temperature
2.3 Wire Size
The wiring and installation methods must conform to all national and local electrical
code requirements.
PV Wire Size
Since PV array output can vary due to the PV module size, connection method or
sunlight angle, the minimum wire size can be calculated by the Isc＊ of PV array.
Please refer to the value of Isc in the PV module specification. When PV modules
connect in series, the Isc is equal to a PV modules Isc. When PV modules connect in
parallel, the Isc is equal to the sum of the PV modules’Isc. The Isc of the PV array
must not exceed the controller’s maximum PV input current. Please refer to the
table as below:
NOTE: All PV modules in a given array are assumed to be identical.
＊Isc=short circuit current(amps) Voc=open circuit voltage.
Model
Max. PV input current
Max. PV wire size＊
MY20
MY30
MY40
20A
30A
40A
6mm /10AWG
10mm /8AWG
16mm /6AWG
2
2
2
＊These are the maximum wire sizes that will fit the controller terminals.
CAUTION: When the PV modules connect in series, the open circuit
voltage of the PV array must not exceed 92V at 25℃ environment
temperature.
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