Product Description; How It Works - Delta RPI-H3 Owner's Manual

1.4 Product Description

This device is a single phase grid-tie solar inverter. It converts direct current
(DC) electricity from photovoltaic power collected from PV Array into single
phase alternating current (AC) to feed the excess capacity back to the local
main electrical grid.
This inverter allows wide voltage input range (125~550VDC for RPI-H3 and
200~1000VDC for RPI-H5) and high performance efficiency based on user's
friendly operation
Processor)design decreases the circuit complication and electronic
components. Please note that this device does not support off-grid function.
The features for RPI-H3/RPI-H5 are shown below.
Features
Power Rating：3 kVA(RPI-H3), 5 kVA(RPI-H5)
Single Phase (L + N + PE), Grid-tie, Transformerless solar inverter
Maximum efficiency：> 97.0%(RPI-H3), > 97.5 %( RPI-H5)
Europe efficiency: 96.2(RPI-H3), 97.0%(RPI-H5)
Reactive power capability (Cap 0.8 – Ind 0.8)
Total harmonic distortion (THD < 3%) @ full load
1 MPP Trackers
16×2 LCD display

1.5 How it Works

The operation of solar inverter is shown as the Figure 1-1. In order to save
energy and electricity, solar inverter convert the DC input power supplied from
the PV Array into single-phase AC output power to Grid.
Figure 1-1 Solar inverter system operation illustration
design. In addition,
2
special DSP(Digital Signal