EnergyStorage

Rural property using SoNick batteries for grid independence – Domestic Case Study

This domestic installation was designed to run as a grid minimisation installation. Although the grid remains available it is actually switched off.

The house is a rural property and is completely electric so electricity usage is higher than it could be for a normal suburban house. Water pumps, electric fences and all electric cooking can use a lot of electricity. Although the electric hot water uses evacuated tubes to heat with solar, this is often not enough in cooler months so the solar / battery system also heats the electric hot water tank.

The system consists of 11.2 KW QCells solar PV panels on a 25-degree pitch
1 x Victron 450/250 MPPT
2 x 9.6 kWh SoNick batteries which equates to 15.5 kWh recommended useable storage
1 x Victron 10 kVA Qattro inverter
1 x Victron Cerbo as the brains of the system which allows the whole system to be monitored remotely and any changes to the system can also be done remotely.

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The case for decentralised power proven after storm power outages

Windy winter weather tends to bring trees down on power lines, cutting off your power supply as many people in Victoria have discovered recently. During the storm that crossed Victoria on 13th February 2024 over 500,000 people lost power and a week later many people in Gippsland and the Dandenong’s are still without power and some have been told it may be some time before their power is restored.

One of the main advantages of decentralised power supplies is that you are not so reliant on things that are happening in the main power grid and can keep a power supply when other areas no longer have one.

There are many flow-on effects when the power grid fails, other than the lack of electricity to power your house or business that may not be immediately obvious if you haven’t experienced extended grid failures before.

When there is no power for many people that also means no water as pumps no longer work.

Now we live in a mainly cashless society when there is no power there is no money flow as ATM’s and electronic transactions are no longer possible. In our area, nearly all the shops had to close for this reason as they couldn’t do any transactions.

In our area also, as there was no power the local petrol station couldn’t operate which meant there was no fuel available for the generators that many people were surviving on, even if they had had the cash to make payments.

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The issue with new battery technologies

ou often hear about new and better battery technologies that are coming on to the market and we often get asked should people wait for these better technologies.

We advise against this for several reasons;

  1. we need to act now to reduce our reliance on fossil fuels, not tomorrow or when a better technology becomes available,
  2. any new battery technology takes 5 to 10 years to becoming proven and commercially viable,
  3. many great battery technologies have failed when they have been used in real life applications,
  4. there is no guarantee that current technologies will get cheaper, in fact due to resource limitations and new government regulations regarding safety and recyclability, it is highly likely current technologies will increase in cost substantially,
  5. although early adopters tend to pay a premium price for their equipment the amounts, they save in energy costs often make up for more than any reduced costs in equipment.

There are new technologies coming out all the time and in the next few years some of them are likely to become available for commercial use. However, these are unlikely to be lithium-based batteries. More and more issues are becoming widely known about the difficulties being experienced with lithium-ion batteries, from fires, to lack of recyclability, to less available resources which is resulting in resources being more expensive, to issues with insuring battery installations.

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Protect yourself and prepare for power outages in coming bushfire season

As the current summer season approaches in Australia, we are receiving more warnings of a possibly severe bushfire season. With memories of the disasters of 2019 – 2020 many people still remember being without power for days and weeks due to power lines being brought down and the dangers of reconnecting the power grid.


This threat of bushfire is becoming an increasing and more serious and long-lasting reality every year, both in Australia and overseas.


Power supply companies are turning off power earlier, particularly in areas with above ground powerlines, when there is a threat of bushfires, to prevent their infrastructure causing more fires.


Particularly in rural areas, loss of power also affects access to water, as electric water pumps no longer work. This can be devasting to livestock as well as humans and often means there is no longer access to water to fight fires.With the interconnectedness of our current power supply this also means that a problem in one area can affect power supply in multiple other areas that may have not been affected by the original bushfire.

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Mobile Renewable Energy Systems for emergency services

A recent joint project between GridEdge, Earthworker Energy and DEECA was to build 3 prototype portable renewable energy systems to supply renewable power for replacement of large diesel generators in emergency response settings supporting DELWP, CFA and SES

The prototypes were;

– 58 kWh battery energy storage, 20 kVA inverter capacity, single phase and 15 kW PV in a custom-built shell on skids similar to current diesel generators

– 20 kWh battery energy storage, 5 kVA inverter capacity and 1.5 kW PV in a portable Trailer

– A portable site hut with built-in 9.6 kWh battery, 5 kVA inverter capacity and 5 kVA PV generation capacity

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