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Selectronic Australia
Rev 41 - Dec 2022
Introduction
Off-Grid Standalone Power Systems (SPS)
The SP PRO is the heart of the power system. It quietly creates an AC electricity grid from a battery input. By
using SP LINK, the SP PRO can be configured to monitor battery state of charge (SoC) and site Load
conditions. This enables it to automatically start and stop the generator as required to charge the batteries
and supply site loads heavier than the SP PRO can efficiently handle. These features, when correctly
configured, will increase the battery life and reduce generator running costs.
When the generator is running, the SP PRO will use the generator to power the site Load, while using any
additional generator capacity to charge the batteries. When the site Loads are greater than the generator’s
output, the SP PRO will add its power to the generator. When the site Loads are reduced, the SP PRO will
return to battery charging. The above operation happens automatically, whilst always maintaining ‘no break’
power to the site.
An SP PRO Managed AC Coupled system is suitable for Off-Grid systems due to the superior battery charging
functions. These are achieved by a sophisticated system control and communications monitoring link between
the SP PRO and the Selectronic Certified solar inverter.
Product Overview