Storm Switch
On Grid battery-based systems are normally configured to
make the best utilisation of solar generated electricity before using stored
solar energy from the battery, as the focus is on using little or zero power from the
electricity grid. This meaning that batteries can be in a discharged state after
the sun goes down. However, if there is an impending storm that may lead to a
loss of grid power, it is wise to try and fully charge your battery before
the grid outage happens.
This document outlines how to configure a “Solar Hybrid
Priority” within the Solar Hybrid Control scheme in SP LINK. There are 8
Solar Hybrid priorities which shape the customers energy usage, where Priority
#1 overrides all other priorities.
In this example we will use Solar Hybrid Priority #1 to provide
battery charging from the grid, we refer to this as a Storm Switch.
All diagrams in this installation note are given for
reference only. Please ensure all wiring complies with relevant safety
standards and is carried out by suitably qualified personnel.
A Solar Hybrid priority can be activated in one of 2 ways, a
static date and time, or by enabling 1 of 4 Digital Inputs. This example
requires the dynamic nature of a Digital Input. A Digital Input will be enabled when a DC voltage of between 10V-60V is applied,
below 10V DC the Digital Input will be disabled.
The schematic below demonstrates the connections for
controlling a Digital Input from dry contacts on an external device. An
external switch must be wired to a Digital Input on the SP PRO’s Expansion Card
for activating the associated Digital Control Input (an overview is provided
below):
The above diagram shows a switch providing DC Voltage to the Digital Input, this switch can be a physical switch in the home or a Smart Internet switch. Whenever the switch is closed, the Solar Hybrid Priority #1 (Storm Switch) will be active, leaving this switch ON after the grid has returned, will cause power to be continually drawn from the grid.
SP Link Configuration
New System
NOTE: Input 1 is selected for this example
Digital Control Activation > Activate Input > Digital
Control Input 1
Charger Control > Battery Charging > Charger On
Charger Override > AC Source Limit During Override > Grid
Input Limit (AC Source Power*)
*You may want
to select AC Source Power if you want to use that as the power limit.
