All posts by solar

Warren Buffet backed BYD China launches B-Box battery storage units in Australia

BYD China is a huge company that builds electric taxis, buses, coaches and now home battery units.  Billionaire Warren Buffet is reported to own 10% of the company. They are launching their latest products into the Australian market place to compete with established players like Tesla, Redflow and LG Chem

The website has a video claiming, with battery storage, fire safety is table stakes and others should Not be at the table. We then see an image showing the Logos of Samsung, LG and others. It then goes on the say that they make the safest batteries in the world. Non toxic chemistry, no landfill nightmare AND, the longest life (Showing an image of 19 years. They then claim their batteries are fire safe, eco safe and future proof. Big claims from a company that is unknown in Australia.

There are 4 units, a B-Box 2.5 is a 2.5 kWh battery. There is a B-Box 5.0, B-Box 7.5 and a B-Box 10.0 They can be stacked together in the enclosure below which is 1 metre tall and 600 cm wide.

The main features are – stable discharge platform, excellent safety, long cycle life, high temperature performance, high energy density, high charge and discharge rate, high energy transfer efficiency and no pollution.
More information

 

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In WA, I get 7.135 cents for my excess electricity but pay 26 cents to buy it back.

And to make matters worse I can’t install a battery. The crisis facing WA residents makes the government look like idiots.  Regulations in WA limit solar systems to 5 kilowatts. By adding a battery to that, you go over the limit making you not entitled to any feed in Tarif at all.

Read more at the ABC  http://www.abc.net.au/news/2017-02-08/solar-rebates-mooted-by-greens-wa-election/8252706

 

 

First Telsa Powerwall Installed in Australia, What’s the Verdict?

 

 

In January 2016 the  first Tesla Powerwall wasinstalled in Australia by Energex, owned by the Queensland government followed by the first residential unit iby Natural Solar in a Sydney home.

The Energex  12 month trial aims to collect data to study what effect solar batteries may have on future peak demand and gain insights in how to address issues such as reduced electricity demand.

The first residential Tesla Powerwall is installed in a Sydney suburban home by self confessed nerd Nick Pfitzer ( pictured below).  At a cost including panels, battery, inverter and installation of around $16,000, the system will never pay for itself before the battery warranty is up. Like all new technology, it can take a while before the price becomes affordable for the masses.  His 7kWh system stores electricity generated during the day so it be used in the evening.

6 months later, what’s the verdict?

Nick claims to have cut his power bill by up nearly 90%, from $5 to $6 per day to 59 cents.

The way to achieve this is to change the way you use electricity. An example is to use solar power more during the day for washing clothes and using the dishwasher. Then use the stored electricity in the battery for use in the evening.

On a cloudy day, you still have to draw power from the grid but when it’s sunny Nick says the battery will charge fully by 11am, even after powering the house and using the dishwasher. Over the six months, solar and batteries power the house about three quarters of the time. Any excess power once the battery is charged is fed back into the grid.  He reckons it will take 10 years for the system to pay for itself. The battery will degrade over the years which could affect the payback period.

Nick installed A 7 kWh Tesla Powewall 1. Now they have released the Powerwall 2 with double the storage capacity. More on the later.