MGA Lego Blocks Used To Unlock 100% Renewable Grid


A fancy new material called miscibility gap alloy (MGA) is causing a stir this week as it shows energy storage capabilities that best even the lithium battery. Although the Australian designed MGA blocks are only in the first round of testing, the potential for the ‘wonder blocks’ could change the way we store energy completely.

What The Heck Is A MGA Block?

The MGA blocks are sized in 20cm X 20cm X 16cm bricks that comprise of heat-retaining metals. With some comparing the ‘wonder block’ to a microwaved choc-chip muffin, the block retains energy in the form of heat. When warmed some internal metals will melt (like choc-chips) while the exterior metals maintain the blocks form (the muffin), meaning long-lasting energy retention.

While research has shown that the MGA blocks are much more cost-effective than lithium batteries of the same size, the blocks can generate just as much energy as their traditional counterpart. Although lithium-ion batteries are quick to output energy they can only store energy for short periods of time, whereas the MGA blocks can retain energy for weeks.MGA blocks

If that wasn’t impressive enough, the blocks are also recyclable, non-toxic and extremely safe to use. At the end of the block’s life cycle (roughly between 25- 30 years), the blocks can be broken up into their individual materials again, made into new blocks or recycled as a raw material for other uses.

With no risk of explosion, leakage or poisoning, the blocks can greatly reduce danger for workers within the electricity plants. Hazzah!

Move Aside Fossil Fuel A New Energy Source Is In Town

The ingenious blocks don’t just store energy, they can heat water to create steam too. In traditional coal plants, the burning of fossil fuels would be used to create the same steam that would then run generators and turbines. These generators and turbines would then be used to produce the electricity we use in our homes.

By replacing the burning of fossil fuels with the use of the MGA blocks we could enable coal-fired power stations to run entirely emissions-free. Transitioning traditional coal plants to this renewable process would be relatively easy as the existing infrastructure can be repurposed just by removing the boiler and the furnace.

How Can It Be Used In The Renewable Energy Industry?

So, what does this mean for the renewable energy industry you ask?

Moving to 100% renewable electricity requires a steady dispatch of energy. Major renewable energy sources, such as solar and wind, are intermittent in their energy production as they rely on sunshine and favorable weather conditions. This means that sometimes they produce more energy than demand and sometimes they produce less.

Renewable Energy Supplied 50% of the National Grid on Easter Saturday

This ‘intermittent’ production of energy means we need an effective energy storage system that collects excess energy on the days of over-production and disperses on demand when energy generation is less than what the market demands.

Similar to Lego, the MGA blocks can be stacked. Blocks can be added and removed depending on electricity demand, meaning the stability of our power grid can always be maintained.


When Can We Expect To See The MGA Blocks Launched?

The MGA blocks are currently still in the testing phase. In July 2020, $495,000 was given to the project from the Department of Industry Innovation and Science to establish a test manufacturing plant in Newcastle, New South Wales.

Next year MGA Thermal is partnering with the Swiss company E2S Power AG, to implement the block technology in an established coal-fired power plant. By retrofitting an existing plant, the European venture should provide a clear example of how we can transition our electricity production to 100% renewable energy in a cheap and effective way.

Interested in more solar news? Visit our blog section for regular updates in everything renewable. All this talk of electricity making you think of how much you pay for your energy? Solar Market has a nifty tool to help you compare your energy providers! Happy saving!

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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.

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