7
8
3.3 Inverter connection
3.3.1 Lithium battery connection
If choosing lithium battery for SPF3000/5000/SPF3000 PLUS, you are allowed
to use Growatt lithium battery only. There’re two connectors on the lithium battery,
RJ45 port of BMS and power cable
Please follow below steps to implement lithium battery connection:
1.Assemble battery ring terminal based on recommended battery cable and terminal
size (same as Lead acid,see section 3.3.2 for details) .
2.Insert the ring terminal of battery cable flatly into battery connector of inverter and
make sure the bolts are tightened with torque of 2-3Nm.Make sure polarity at both
the battery and the inverter/charge is correctly connected and ring terminals are
tightly screwed to the battery terminals.
3.Connect the end of RJ45 of battery to BMS communication port of inverter
Growatt
4.The other end of RJ45 insert to battery comm port.
Figure 3.4
Note: if choosing lithium battery, make sure to connect the BMS communication
cable between the battery and the inverter. Also, you need to choose battery type as
“lithium battery”
Figure 3.5
3.3.2 Lead acid battery connection
User can choose proper capacity lead acid battery with a nominal voltage at 48V. Also,
you need to choose battery type as “lead acid battery”.
WARNING! For safety operation and regulation compliance, it’s requested to install a
separate DC over-current protector or disconnect device between battery and
inverter. It may not be requested to have a disconnect device in some applications,
however, it’s still requested to have over-current protection installed.
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use
appropriate cable for battery connection. To reduce risk of injury, please use the
proper recommended cable and terminal size as below.
Ring terminal:
Figure 3.6
Recommended battery cable and terminal size:
Table 3.1
Note: for lead acid battery, the recommended charge current is 0.2C© battery
capacity)
Please follow below steps to implement lead-acid battery connection:
1.Assemble battery ring terminal based on recommended battery cable and terminal
size.
2.Connect all battery packs as units requires. It’s suggested to connect at least
100Ah capacity battery for 3KVAmodel and at least 200Ah capacity battery for 5KVA
model.
3.Insert the ring terminal of battery cable flatly into battery connector of inverter
and make sure the bolts are tightened with torque of 2-3Nm.Make sure polarity at
both the battery and the inverter/charge is correctly connected and ring terminals
are tightly screwed to the battery terminals.
Dimension(mm)
Cross
-section
Inner
diameter
Length
200AH
130A
14
6.4
29.2 2-3Nm
40A
2*8A
WG
100AH
1*8A
WG
SPF3000 PLUS
Recommen
ded charge
current
20A
Torque
2-3Nm
23.86.4
Max.
charging
Current
Capa
city
Diame
ter
100A
100AH
100A
14
6.4
29.2 2-3Nm
20A
1*6A
WG
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