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Selectronic Australia
Rev 41 - Dec 2022
Installation
Adding a Backup Generator (Solar Hybrid)
With the optional Grid Fail / Generator Backup kit (stock Code 005268), an auto start backup generator can be
added to 24V- or 48V-model SP PRO Solar Hybrid systems. Auto start backup generators can be added in a
single-phase or three-phase system where there is only one SP PRO per phase. Three kits will be required in a
three-phase system.
When the grid fails, the customer’s site Load power will be supplied from the battery
bank until either the Load becomes too large for the system or the battery reaches a preset SoC. At that point
the generator will start, run the site loads and charge the battery bank. The generator will continue to run until
either the battery bank has recharged or grid power has been restored.
For more detailed information see
IN0020 – SP PRO Grid Fail / Generator Backup Kit
supplied with the Grid Fail / Generator Backup kit.
A Grid Fail / Generator Backup kit is not required when adding a
generator to an Off-Grid system.
Adding a Generator (Off-Grid Only)
No extra hardware is required when adding a generator to an Off-Grid system. It is strongly recommended that
a generator be incorporated in an Off-Grid system to ensure availability of supply under unexpected
conditions.
The SP PRO may be configured to automatically control a generator in an Off-Grid power system. The
generator may be automatically started by the SP PRO as required to supply the Load and charge the battery
bank. The SP PRO may also be configured to allow manual control of the generator by the user, although
automatic control of the generator is strongly recommended for daily operation.
The line diagram below shows the AC connections for the generator. The generator control link can be
set up as a two-wire or three-wire configuration. For more information on the control
TN0025 – SP PRO Generator Controller Wiring Guide
Line Diagram for Auto Start Generator – Off-Grid system
Diagram given as a reference only. Please ensure all wiring complies with relevant safety standards.
Ancillary Components
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