Model
Rated charging
current
Rated
discharging
current
Solar wire
diameter
(mm²/AWG)
Battery wire
diameter
(mm²/AWG)
Load wire
diameter
(mm²/AWG)
MT1050-EU/RS485
MT1550-EU 15A 10A 4/11 4/11 2.5/13
MT2075/2010 20A 20A 5/10 5/10 5/10
MT3075/3010 30A 30A 6/9 6/9 6/9
MT4010/4015 40A 30A 10/8 10/8 6/9
10A 10A 2.5/13 2.5/13 2.5/13
13
⑤
⑥
MEN U OK
①
②
③
④
5.4 Connection
We strongly recommend connecting a fuse directly to the battery terminal to protect from any short
circuit in the battery circuit. PV-modules generate current whenever light shines on them. The generated
current is directly proportional to the light intensity. Even low levels of light, will deliver the PV-Modules
no load, full voltage. It is thus utterly advisable to protect PV-modules from any incident light during
installation; Never touch uninsulated cables (ends), only use electric insulated tools, and make sure that
the wire cross section is adequate for the PV module operating currents. Connections must always be
conducted in the sequence as described below
5.3 Wiring Specifications
Wiring and installation methods must comply with national and local electrical codes/specifications.
The wiring specifications of the PV-system battery must be selected according to rated currents. Please check
following table for wiring specifications:
!
The indicated cable/wire sizes are for reference only. If longer runs between the PV array and the
controller or between the controller and the battery are required, then larger capacity cables must be
used to reduce voltage drop and improve system performance.
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