Hybrid Installation - DAYLIFF SUNVERTER 4 Installation & Operating Manual

3.8 Others
AC circuit breaker (rated current 25A or above) should be installed as protection
Ÿ
switch for AC power input.
The inverter has one pair of DC input terminals. If the solar modules are multi-
Ÿ
paralleled, an additional solar combiner box is necessary.
The inverter must be grounded reliably and the grounding cable properly sized and
Ÿ
as short as possible. If possible, the inverter should be grounded separately.
In areas with high incidence of lightning, it is recommended to install an external
Ÿ
surge protector at the power input of the inverter.
If the inverter is far from the motor (>100m), it is recommended to install an output
Ÿ
reactor or filter.
For optimal performance, it is advised to incorporate input and output reactors,
Ÿ
dedicated filters, and magnetic rings at the inverter's input and output connections.
These components effectively reduce noise and prevent interference with other
components or systems.
Consult nearest Dayliff dealer for the extra accessories such as AC disconnect/ AC
Ÿ
breaker combiner, surge suppressor and reactors.
SV4/1.5M
SV4/2.2M
SV4/3.0M

3.9 Hybrid Installation

The SV4 series solar pumping inverter incorporates a hybrid power input feature,
combining PV and AC power sources. The PV input is connected to the bus circuit using
an anti-reverse diode, while the AC power input is rectified through a rectifier bridge
and then linked to the bus circuit. This allows simultaneous connection of both power
sources, facilitating the utilization of hybrid power to drive the water pump motor.
Hybrid Mode
Solar priority mode (Pr6=1) default.
Where there is both AC and PV power inputs, inverter adjusts pump running speed
prioritising solar power and only blends with AC power when there is insufficient solar
power. Insufficient solar power is detected when the pump speed falls below the set
weak light frequency value (Pr.14).
AC+PV blending (Pr6=0)
In the presence of both AC and PV power inputs, the inverter drives the pump at its
designated speed. The utilization of solar power is greatly enhanced during periods of
high solar irradiance, typically reaching approximately 1000 W/m².
Model
AC Breaker (A)
4 16
25
40
50