We are always interested to learn about the opportunity comes to save some money on the electricity bill!  Are you interested in alternative power sources to protect your house and family from power outages?

We are familiar with the idea of adding some solar panels to try to save some money, but it hasn’t always worked out how we thought.  The bills keep on coming in, due to the fact that we use more power than we can generate on the roof.

How about getting off the grid altogether?  Are you interested in getting rid of the power bill completely?  Now that is interesting!


The concept of an independent battery storage system is nothing new, and the concept of generating solar power has been widespread in recent years, but the ability to put the two together AND go off the grid is starting to become more and more attractive!


For these reasons, the Tesla Powerwall unit has been highly anticipated.

The Tesla Powerwall is a 7 kilowatt hour lithium battery storage system that generates electricity from rooftop solar panels, and stores that power for domestic use.  The system is very attractive to domestic electricity users (that means all of us!) whereby the system allows us to generate electricity from a totally renewable energy source – the Sun – and store that energy for use later in the evening when we really need it.

Sounds simple enough, and now it has become a reality thanks to Tesla and the advancement of technology.  With more efficient photovoltaic solar cells, and improved battery storage technology we now have the ability to efficiently generate and store sufficient energy to power our own domestic needs.

However, there is a cost to installing the system which may be prohibitive to some people, and there is also the leap of faith required to disconnect from the electricity grid and fly solo in this modern world where we seem to be so dependent on energy consumption for our daily needs.

How does the TESLA POWERWALL work?

If you do not already have solar panels, the Tesla Powerwall can be purchased as part of a complete system that includes solar panels, a power inverter, and the lithium ion battery system.

The beauty of the system is that you can install solar panels in an array sufficient to meet your energy needs during the day, but which also provides additional power to recharge the battery system each day.  Depending on your individual power requirements, this means you need at least a 4 – 5 kWh array of solar panels.

If you already have solar panels will be able to use your existing array, but this means you have to re-direct the solar energy into the Tesla battery system rather than exporting it to power company, which is how most systems are wired.  This means you will probably have to purchase a different electricity inverter to match the Tesla battery system to make sure your system is compatible.

Now the lithium battery system is where this gets interesting.  Unlike most other battery storage systems that you might be familiar with, the Tesla Powerwall is designed for a daily discharge cycle, which means it can easily handle the daily cycle of charging during the day, and discharging each night – this will not damage the battery!  In fact, this is how the system has been designed, and the latest battery technology has been designed around the daily energy cycle, not just for power storage.


How much does it cost?

This depends on where you are located and whether you already have solar panels on the roof of your house, and of course, it comes down to your individual energy consumption, and therefore how many solar panels you actually needs to supply your energy.

Speaking conservatively, you should expect a complete installation of the Tesla Powerwall to start from US $10,000 and increase up to US $20,000 depending on your individual requirements.


Does the TESLA POWERWALL Generate Enough Power?

Once again, the answer depends on your energy usage, depending on the size of your property, the number of residents, and your climatic conditions.  Unfortunately, heating a large area is obviously very energy intensive, and similarly, cooling units and air conditioners can be a major consumer of electricity.

The basic Tesla Powerwall supplies a 7 kWh battery capacity, which is reportedly satisfactory for a small property with light to moderate energy requirements.  Unless you can reduce your domestic energy requirements to meet these guidelines, then the Tesla Powerwall might leave you in the dark.  This would not be good!

To overcome the problem, the system is flexible so as to provide more solar cells to compensate for lower levels of sun light, or to add additional batteries to increase your storage capacity.