September2017

Time for pragmatism, not panic, for the electricity market

There was a familiar knee-jerk reaction to last week’s announcement by the Australian Energy Market Operator (AEMO) that there are risks to our electricity supply after the scheduled closure of the Liddell coal-fired power station in New South Wales in 2022. The sight of the Prime Minister looking for options to keep Liddell open raises […]

The day Australia was put on blackout alert

The only way the Australian Energy Market Operator (AEMO) could be blunter in its report on the state of our electricity system would be to stick a neon sign on top of its Melbourne head office saying “The market has failed”. AEMO’s Advice to Commonwealth Government on Dispatchable Capability, released today, shows there are significant […]

Victoria is the latest state to take renewable energy into its own hands

The Victorian government’s intention, to legislate its own state-based renewable energy target is the latest example of a state pursuing its own clean energy goals after expressing frustration with the pace of federal action. The Andrews government has now confirmed its plan for 40% renewable energy by 2025, as well as an intermediate target of […]

WA bathes in sunshine but the poorest households lack solar panels – that needs to change

WA bathes in sunshine but the poorest households lack solar panels – that needs to change Solar panels are still a rarity in WA’s lower-income areas. Many Western Australian householders are living in “energy poverty”, according to our new Bankwest Curtin Economics Centre research report, Power to the People: WA’s Energy Future. Although average household […]

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Understanding Batteries

Off-Grid Systems

For some households a battery system can be of great benefit and minimise a home’s reliance on the grid. However, it’s important to understand for a battery to be useful your solar system needs to be generating excess energy for the battery to store, which you can then use at night or when the sun is not out.

When selecting a battery, you’ll want to invest in a system that is most suited to your home and can drive the best return on investment (ROI). Despite a larger upfront cost, a higher quality battery may significantly increase your ROI.

    Battery systems start from $6,000 and costs can vary greatly based on the following factors:

  1. Cycle Life-Time

    The number of times a battery can fully charge and discharge.

  2. Battery Power (kW)

    How fast it can be charged or discharged.

  3. Storage Capacity (kWh)

    The maximum amount of energy a battery system can store.

  4. Battery Management System (BMS)

    An electronic ‘smart’ system that gathers data and manages the battery ensuring it does not overload or operate outside of its safe functioning zone..

  5. Inverter

    Battery systems require their own inverter if your solar system does not have a hybrid inverter.

  6. 'All-In-One Unit’

    A system which includes the battery, BMS and an inverter all in one unit.

  7. Warranty

    Length of time or cycles the battery system is under guarantee.

  8. Blackout Protection/Backup

    It’s important to note this is not a common feature of a battery system and could cost thousands of dollars to include. Blackout protection not only requires additional components but also a specialised installation and rewiring. For grid-connected homes, the cost for blackout protection can outweigh the benefit.

Additionally, if your purpose for adding battery is to go Off-Grid and become completely independent from the grid you will need to ensure your solar system can generate enough energy to power your home and your battery system is large enough to store this energy. For homes in metro areas going Off-grid is not cost effective and is only recommended for those in remote areas with limited access to the grid. Off-grid solar systems with battery start at approximately $30,000.