1.3 Validity
This user manual describes the installation process, maintenance, technical data and
safety instructions of the following solar inverter models under the DELTA brand.
1.6 Additional Information
For more detailed information for RPI H3A/ H4A/ H5A or other related product information,
please visit : http://www.deltaww.com.
1.5 How it Works
The operation of a solar inverter is shown in Figure 1-1.
In order to save energy and electricity, the solar inverter converts the DC input power
supplied from the PV Array into single-phase AC output power to Grid.
• RPI H3A
• RPI H4A
• RPI H5A
1.4 Product Description
This device is a single-phase grid-tie solar inverter. It converts direct current (DC)
electricity from the PV array into single phase alternating current (AC) to feed the excess
generated power back to the local grid.
This inverter allows for a wide voltage input range (100~550VDC) and has a high
performance efficiency and user friendly design and operation. In addition, the special
DSP (Digital Signal Processor) design reduces the complexity of the circuit and electronic
components. Please note that this device does not support off-grid function. The features
for RPI H3A / H4A / H5A are shown below.
Features
• Power Rating : 3kVA (RPI H3A), 4kVA (RPI H4A), 5kVA (RPI H5A)
• Single–phase (L + N + PE), Grid-tie, transformerless solar inverter
• Maximum efficiency : >97.5%
• Europe efficiency : 96.8% (RPI H3A), 97.0%(RPI H4A), 96.8%(RPI H5A)
• Reactive power capability (Cap 0.8 – Ind 0.8)
• Total harmonic distortion (THD < 3%) @ full load
• 2 MPP Trackers
• 16×2 monochrome LCD display
Electrical GridSolar InverterPV Array
Figure 1-1: Solar system operation illustration
8
General Information
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