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Fire risk for solar and batteries
Victoria’s Metropolitan Fire Brigade says it may take “Years to understand’ the fire risk posed by lithium ion battery storage The MFB said the solar installations were vulnerable to faults across their systems, including isolation switches, inverters and installed wiring, and from deteriorating components. The alarming figures come as the solar battery storage industry pushes to kill new regulations that would force homeowners to build a separate “fire bunker” housing for battery installations. Under draft rules released by Standards Australia, lithium ion batteries are classed as “Fire Class 1” and would not be allowed inside or within 1m of a domestic dwelling. The industry will have until August 15 to respond to the draft regulations. The safety moves are designed to avoid a repeat of Labor’s insulation batts scheme in which the rapid rollout of roof insulation in 2009 led to more than 200 house fires across the nation, and ultimately four deaths.
Categories: Battery safety -
Battery Drawdown Capabilities
Energy storage batteries come in a variety of different sizes and weights and each have different characteristics. Here is a comparison of some different battery technologies currently available in Australia with an indication of the amount of power that can be drawn down. You can see from this image that size is not necessarily a good indication of the power that is available to be used from a battery. Some batteries have much better energy density than others. Another thing to consider is how much power you can actually draw from the battery at any point in time. Our SoNick battery can draw 150 amps for 4 hours continuously but some other batteries are very limited in the amount of power that can be used, maybe only with enough to boil a kettle and little more.
Categories: Battery Storage -
Tindo Bus summary
The Tindo buses in Adelaide were the first solar powered all-electric buses in the world and the first prototype was commissioned by the Adelaide council in 2008. The Tindo buses first commenced operation on 11/2/2008 and had operated for 60,000 km by 2010. (Tindo is the Kaurna Aboriginal name for sun)
The first prototype bus was so successful that a further 2 all electric buses were commissioned in 2010. Both the buses and the FIAMM SoNick batteries have exceeded all expectations of performance.
Overall, when compared to other electric buses now in operation the Tindo bus has one of the most demanding schedules in the world.
One of the reasons the SoNick battery technology was chosen was due to its safety. The SoNick battery is non-combustible so there are no safety issues with possible explosion or fire on impact in the case of a bus crash as there can be with lithium ion batteries. Another consideration was that the batteries are fully recyclable and the cost of recycling is included in the battery price. The SoNick batteries are virtually maintenance free, very lightweight and operate efficiently, no matter what the ambient temperature is and have a longer expected life cycle than other battery technologies.
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Battery Standards and Lithium battery fires
It is interesting that everyone is up in arms about the battery standards being introduced into Australia but maybe people should be asking
why these standards are being brought in. It is not only government and coal company lobbying.
Yes, lithium ion batteries are currently cheaper and installing them in safer locations will add cost to installing them, however there are already safer battery technologies on the market that are being pushed out of the market due to the cheap cost of lithium ion batteries.
It is easy to say there is a low probability of your lithium ion battery catching fire, (and some lithium battery technologies are safer than others), but if it is your house that burns down or someone in your house that is injured you may be taking a different view on the safety standards.
The thing that is not being addressed here is that a fire doesn’t have to start in the battery due to a fault in the battery for the battery to catch fire; it can start in the vicinity of the battery and then move to the battery. The standards are designed to help the fire brigade protect your property and their members safety by limiting the dangers caused by battery fires that can’t be put out.
Categories: Battery safety -
How will Climate Change affect Australia?
Across Australia, extreme weather events are projected to worsen as the climate warms further.
Extreme heat is projected to increase across the entire continent, with significant increases in the length, intensity and frequency of heatwaves in many regions.
The time spent in drought is projected to increase across Australia, especially in southern Australia.
Categories: Climate change -
Battery Recycling
One of the things that you should consider when putting battery storage on your home is whether or not the battery will be recyclable at the end of its life. Recycling batteries at the end of their life has a number of benefits:
- It enables the recovery and reuse of materials including lead, iron, plastics, aluminium, copper, lithium, cobalt and electrolyte
- It diverts toxic and hazardous materials from landfill
- It ensures that batteries are managed safely
- There may be a financial return (depending on the battery type).
Categories: Battery recycling -
How freezing temperatures affect batteries
Recent sub zero temperatures in Victoria have caused problems with liquid in solar panels and batteries freezing.
Plumbers and solar installers say they have struggled to keep up with unprecedented demand for help as temperatures plummet. Cold weather can cause water in solar panels to freeze and expand, resulting in snapped and split panels and broken frost valves. Naturally this problem is worse in cheaper products or products that aren’t installed properly to allow for temperature extremes.
We have also heard of several instances of batteries freezing as well. Most lead acid and lithium ion batteries only operate effectively between around 5 – 35 to 40 °C which is problematic on days when the temperature gets very cold or even is below freezing as we experienced in Melbourne recently.
Categories: Battery temperatures -
Battery Storage Possibilities
Many households and businesses already attach battery storage to their clean energy systems. Now is the time to grow the industry, encourage the take-up of storage and help make Australia a renewable energy leader. With public interest high, now is the time for a targeted, five-year support package to drive down costs and put battery storage in reach of every household and business.
Categories: Battery Storage -
Comparing battery technologies
Until recently lead acid batteries have been the major player in the energy storage industry, particularly for off grid installations but
they have serious limitations in terms of requiring customer maintenance and of course they are made from toxic materials.
Recently, Tesla’s lithium ion batteries have received a lot of attention due to their advertised low price and excellent marketing, however the lithium ion batteries are now receiving attention due to their fire risk on the release of embodied energy. Lithium ion batteries have a smaller operating range than most other batteries and won’t operate efficiently above 35 – 40°C. Also, lithium is a toxic material and is in limited supply and at this stage can’t be recycled effectively.
There are some new technologies coming onto the market, such as Redflow’s zinc bromide, Aquion’s sodium ion salt water batteries, improved lead acid and many variations of lithium battery. These each have advantages and disadvantages, both in terms of performance and size.
Depth of Discharge (DOD)
Categories: Battery Storage -
How much battery capacity do you need?
When people start looking at energy battery storage one thing they often ask is I have “x” kW solar on my roof at the moment, how much battery storage do I need?
This isn’t an easy question to answer and there definitely isn’t a one size fits all answer. If someone tries to sell you a battery without asking about your lifestyle and what your needs are then walk away. Chances are they are just trying to sell you their battery and not really working towards what is best for you. The cheapest battery upfront may turn out to be more expensive in the long run if the battery technology isn’t matched to your needs.
The amount of storage isn’t really related to the amount of solar you have on your roof (although it is definitely part of the equation) but it is more to do with how much power you use on a daily basis, how long you want backup power for and what appliances you want to operate from the battery.
Categories: Battery Storage
Recent Posts
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Categories
- Battery degradation
- Battery fire
- Battery recycling
- Battery safety
- Battery Size
- Battery Storage
- Battery temperatures
- Bioenergy
- Case Study
- Climate change
- Electric bus
- Energy efficient building
- Energy storage
- ESG Battery
- Life Cycle Analysis – LCA
- non-flammable battery
- Off grid
- peak demand charges
- Portable energy storage
- Power security
- Renewable Energy
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