OFF
Figure 2.4.2-7
CT B
CT A
CT C
CT A connect to L1
CT B connect to L2
CT C connect to L3
2.4.3 SMART METER & CT CONNECTION
Declaration For Back-Up Function
GoodWe BT series bi-directional inverters are able to supply over load output power at its' back-up.
For details please refer to the technical parameters of GoodWe BT series inverter(4.3 se)
And the inverter has self-protection derating at high ambient temperature.
The below statement lays out GoodWe general policies governing the energy storage inverters of the
series ES, EM, SBP, ET, EH,BH and BT.
1. For Hybrid inverters (Series ES, EM, EH and ET), the standard PV installation typically consists of the
connection of the inverter with both panels and batteries. In case of systems not connected to the
batteries, the Back-Up function is strongly not advised to use. GoodWe shall not cover the standard
warranty and be liable for any consequences arising from users not following this instruction.
2. Under normal circumstances, the Back-Up switching time is less than 10 ms (the minimal condition
to be considered as the UPS level). However, some external factors may cause the system to fail on
Back-Up mode. As such, we recommend the users to be aware of conditions and follow the
instructions as below:
1) Do not connect loads if they are dependent on a stable energy supply for a reliable operation
2) Do not connect the loads which may in total exceed the maximum Back-Up capacity
3) Try to avoid those loads which may create very high start-up current surges such as Inverter
Air-conditioner, high-power pump etc.
4) Due to the condition of battery itself, battery current might be limited by some factors including but
not limited to the temperature, weather etc.
Accepted loads as below:
• Inductive Load: 1.5P non-frequency conversion air-conditioner can be connect to back-up side. Two
or more non-frequency conversion air-conditioner connect to back-up side may cause UPS mode
unstable.
• Capacitive Load: Total power <= 0.6 x nominal power of model. (Any load with high inrush current
at start-up is not accepted.)
• For complicated application, please contact GoodWe's after service.
•Smart Meter & CT Connection Diagram
(
Figure 2.4.2-7
)
•Smart Meter LED Indications
Declaration For Back-Up Overload Protection
Inverer will restart itself as overload protection happens. The preparation time for restarting will be
longer and longer (max one hour) if overload protection repeats. Take following steps to restart inverter
immediately.
• Decrease Back-up load power within max limitation
• On PV Master
→
Adcanced Setting
→
Click “Reset Back-Up Overload History”.
Note:
For a convenient maintenance, Please installed a
“4Pole3Throw”on Back-Up and On-Grid side. Then it
is adjustable to support load by Back-Up or by grid or
just leave it there. (Figure 2.4.2-7)
Figure 2.4.2-7
1. Load is supplied from Back-Up side.
2. Load is isolated.
3. Load is supplied from grid side.
The Smart Meter with CT in GoodWe product box is compulsory for BT system installation, used to
detect grid voltage and current direction and magnitude, further to instruct the operation condition of
BT inverter via RS485 communication.
Note
1. The Smart Meter with CT is well configured, please do not change any setting on Smart Meter.
2. One Smart Meter can only be used for one BT inverter.
3. Three CTs must be used for one Smart Meter, and must be connected on the same phase with Smart
Meter power cable.
•Detailed pin function of each port on BT
Note:For BMS cable, CAN communication is configured by default. If 485 communication is
used,please contact GOODWE to replace with the corresponding communication line.
Note:
1. Please use the Smart Meter with 3 CTs in
GoodWe product box.
2. CT cabke is 3m as default, could be
extended to max 5m.
3. Smart Meter communication cable (RJ45)
is attached on the inverter (”To Smart
Meter” cable), could be extended to max
100m, and must use standard RJ45 cable
and plug, as below:
Make sure AC cable is totally isolated from AC power before connecting Smart Meter &
CT.
[6]
POWER
ENERGY
COM
OFF
Not working
/
ON
Working
Importing
Blink one time when it transfer data to inverter
Blinking
/
Exporting
POWER
ENERGY
COM
Position
1
2
3
4
5
6
7
8
Color
Orange&white
Orange
Green&white
Blue
Blue&white
Green
Brown&white
Brown
RS485
485_A
485_B
485_A
NC
NC
485_B
NC
NC
BMS Function
485_A2
NC
485_B2
CAN_H
CAN_L
NC
NC
NC
Smart Meter Function
NC
NC
485_B1
NC
NC
485_A1
485_B1
485_A1
12
11