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02 Installation Instructions User Manual V1.3-2021-12-15
Note:
For a convenient maintenance, an DP3T support could be installed 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.
1. Back-up load is supplied from back-up side.
2. Back-up load is isolated.
3. Back-up load is supplied from grid side.
Declarations for backup 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"
The single-phase Smart Meter with 2 CTs in product box is compulsory for the system
installation, used to detect grid voltage and current direction and magnitude, further to instruct
the operation condition of the inverter via RS485 communication.
1
2
3
SP3T
Back-Up
Grid
On-Grid
Load
2.4.3 Smart Meter & CT Connection
Make sure the AC cable is totally isolated from AC power before connecting the Smart
Meter and CT.
Note:
1. The Smart Meter and CT is well congured, please do not change any setting on smart meter.
2. CT must be connected on the same phase with smart meter power cable.
3. Please use the Smart Meter with CT in product box.
4. CT cable is 3m as default, could be extended to max 5m.
5. 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 the diagram:
current at start-up is not accepted.)
• For complicated application, please contact after-sales.
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