SP60/SP80 User Manual V1.3
TBB Power Co.,Ltd
17
4.0 Installation
4.1 PV Array requirement
Each SP must be connected to its own PV array. Please find following maximum PV array can be
connected under various DC systems.
Battery
SP60-150
SP80-150
Recommended PV
12Vdc
900W
1200W
24Vdc
1800W
2300W
48Vdc
3500W
4600W
The Voc (open circuit voltage) of PV array must never exceed 150Voc. The PV
array Isc must not exceed the nominal current of SP at any time (60A or 80A).
The Voc or Vmpp of solar panel was rated at 25
℃
with normal weather
condition. Along with temperature reduced, the Voc/Vmpp of solar array will
increase. Please consult with PV manufacturer for Voc/Vmpp of the lowest
possible environment temperature and making sure it is below 150Vdc.
PV array with Isc up to 55A was recommended for SP60 (73A for SP80) to allow for increase
of Isc caused by irradiance enhancement under certain condition.
Please ensure the PV array used in the system operates within the MPPT operational
window. Following table4-1 shows effects of different PV array voltage.
Voltage
Effect
SP mode
Vmpp = Vbatt to 135Vdc
Maximize the harvest of solar energy
Charging
Vmpp > 135Vdc
SP shut down. Voc is often higher than
150VDC when Vmpp is higher than 135V
DC. Unit might damage if Voc>150V
Overvoltage
fault
Tab4-1
Effects of different PV array voltage
