opti-solar Sp4000 Premium, User Manual

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Recommended AC input and output cable size for each inverter:
Model AWG no. Conductor cross-section Torque
4KW 10~8 AWG 5.5~10 mm
2
1.4~1.6Nm
You need to connect the cables of each inverter together. Take the battery cables for
example: You need to use a connector or bus-bar as a joint to connect the battery
cables together, and then connect it to the battery terminal. The cable size used from
joint to battery should be X times of cable size in the tables above. “X” indicates the
number of inverters connected in parallel.
Regarding cable size of AC input and output, please also follow the same principle.
CAUTION!! Please install the breaker at the battery side. This will ensure the inverter
can be securely disconnected during maintenance and fully protected from
over current of battery.
Recommended battery breaker for each inverter:
Model One unit*
4KW 125A/60VDC
*If you want to use only one breaker at the battery side for the whole system, the rating
of the breaker should be X times current of one unit. “X” indicates the number of
inverters connected in parallel.
Recommended battery capacity
Inverter
parallel
numbers
2 3 4 5 6 7 8 9
Battery
Capacity
400AH 600AH 800AH 1000AH 1200AH 140AH 1600AH 1800AH
CAUTION! Please follow the battery charging current and voltage from battery spec and
choose the suitable battery. The wrong charging parameters will reduce the
battery lifecycle greatly.
Approximate back-up time table
Load (W) Backup Time @ 48Vdc 800Ah(min) Backup Time @ 48Vdc 1200Ah(min)
5,000 240 360
10,000 112 168
15,000 60 90
18,000 40 60
24,000 50 90
36,000 30 50
PV Connection
Please refer to user manual of single unit for PV Connection.
CAUTION: Each inverter should connect to PV modules separately.