Introduction
14 Owner’s Guide – Redback Smart Hybrid System – v3.8
8.3 Getting the best from your batteries
Your batteries will do a great job of looking after themselves, with no intervention required if they have the correct State of
Charge (SoC) settings for your needs.
In day-to-day use, your batteries may discharge
down to this % of total capacity.
*
This is the deep discharge limit- it protects the
battery from damage due to over-discharge
during a
backup event i.e. during a blackout.
*State of Charge: The battery manufacturer will specify the lowest acceptable value.
Backup Reserve
Your system configuration and backup requirements will determine your
settings, which create the Battery Usage Plan, as shown right.
The Backup Reserve is the energy withheld for use by the backup circuit
during a grid outage event.
Backup Reserve = (Minimum SoC – Minimum SoC Offgrid) %
The Backup Reserve is a balancing act: A large reserve increases the backup
run-time when needed but may decrease the everyday use of self-
generated energy.
Put another way, it’s blackout security v. energy cost.
Think about your own needs, then ask your installer to adjust the Minimum
SoC according to your priorities.
8.4 Getting the best from your relays
Your inverter can control up to four relays- usually used to turn specific equipment ON or OFF remotely, or ON and OFF
according to a once-off or daily schedules. The objective is to move power usage into daylight hours, after batteries have
charged, and when excess solar power is being exported or not used at all. Typical applications are pool or water tank pumps,
and hot water systems.
To use this feature, ask an electrician to install a dedicated, relay-controlled circuit for the equipment.
The schedules are created in the Redback portal, under the CONTROL tab. Multiple daily events are permitted excepting that
they may not overlap and must start and finish on the same day. Manual control is also possible, using the ON and OFF controls.
Frequent deep discharging will shorten
the life of your battery. If you
experience frequent blackouts in your
area, ask your installer to set the Minimum SoC
higher than usual. This extends your backup
run-time and reduces the number of deep
discharge events.
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