SMA SUNNY ISLAND 4.4M Operating Manual page 101

SMA Solar Technology AG
The Sunny Island distinguishes between battery current sensors of the types 50 mV and 60 mV. The types reflect the
amplification factor of the battery current sensor. The amplification factors are given in amperes per 50 mV or in
amperes per 60 mV, e.g., 400 A/60 mV.
The basic procedure for changing operating parameters is explained in another section (see Section 8.6, page 113).
Procedure:
1. Switch off the Sunny Island and open the battery fuse load-break
switch quickly.
2. Short-circuit the measuring cable at the battery current sensor. To
do so, Connect the BatCur– and BatCur+ insulated measuring
conductors to the connection for BatCur+.
3. Close the battery fuse load-break switch quickly and switch on the
Sunny Island.
4. Set the parameter Current sensor type (60mV, 50mV) to the type and amplification factor of the battery
current sensor used.
5. Select the parameter Autocalibration of the external battery current sensor and set to On.
☑ The Sunny Island starts the adjustment.
6. After 10 seconds, select the parameter Battery > Battery > Current > Battery current and read off the value.
7. If the value of the parameter is not between 0 A and 1 A, ensure that the measuring insulated conductors are
properly connected and the battery current sensor is short-circuited. Then repeat steps 4 to 6.
8. If the value of the parameter is between 0 A and 1 A, switch off
the Sunny Island and open the battery fuse load-break switch
quickly.
9. Connect the BatCur+ insulated measuring conductor on the side
for connecting the battery fuse.
Operating manual
BatCur +
BatCur −
Battery
BatCur +
BatCur −
Battery
SI44M-80H-13-BE-en-15
7 Commissioning
Battery fuse
Battery fuse
101