knowledge article

How batteries save you $$$ and keep you going in an outage

12/09/2024

In today's world, where violent weather and rising energy costs are causing blackouts and expensive power bills, more and more Kiwi homeowners are turning to solar.

Solar panels make free power for you to use during the day - but a home battery will let you store it for use at night time (when grid power is at its most expensive) or for use in a blackout, making them a smart investment for the future.

Blackouts are happening more often: A Wake-Up Call

Recent events in New Zealand have highlighted the vulnerability of New Zealand's power grid. From the outage that left over 100,000 Northland homes without power for days to the Coromandel power cuts and many others, it's clear that having a reliable backup solution is more important than ever.

The Solar Battery Revolution: Powering Homes, Saving Money

As the grid becomes more unreliable and energy costs continue to soar, solar batteries have emerged as the game-changer. By storing excess energy generated by solar panels during the day, these innovative systems can power your home at night or during an outage, providing an uninterrupted supply of electricity.

Introducing the Tesla Powerwall 3: A Powerful and Affordable Solution

In a groundbreaking move, Tesla has recently unveiled the Powerwall 3, a cutting-edge solar battery system that promises to revolutionise the industry. This all-in-one solution combines a 13.5kWh battery with a 10kW inverter, delivering double the power output of its predecessor, the Powerwall 2.



Affordable Pricing for Kiwi Homeowners

One of the standout features of the Powerwall 3 is its built-in inverter. Traditionally, solar systems require a separate inverter to convert energy, which adds to the overall cost and complexity. Tesla has streamlined this by integrating the inverter directly into the battery, creating a cutting-edge, all-in-one solution. This innovation dramatically reduces the overall cost, making the Powerwall 3 as affordable as budget systems, yet a far more compelling choice for homeowners seeking premium solar technology.

How to Generate Savings with Solar batteries

The Tesla Powerwall 2 and 3 is built to help you save money while keeping your home powered efficiently:

  • All-in-One Value with Powerwall 3: A 13.5kWh battery combined with a 10kW inverter reduces installation costs and lowers the overall price of your system.
  • Increased Efficiency: With 97.5% solar-to-grid efficiency, Powerwall 3 maximises solar energy, cutting grid use and lowering bills.
  • Offset Power Costs: Use stored energy during peak times when rates are high.
  • Strong ROI: Increase your property value with a solar + battery system while slashing your power bill.

Real-Life Testimonial: Kiwis Embracing Solar Batteries

Don't just take our word for it; hear from fellow Kiwis who have already experienced the transformative power of solar batteries.

Mike Dickens - Wellington “Daryl was able to talk us through our questions and expectations.  His choice to use a regular install crew that he could trust and rely on is a good call, rather than just random hired hands.  

The battery really is the game changer enabling power to be used later in the day, coupled with maximising Contact's free power 9.00 - midnight, meaning in summer very little paid for power used, whilst being paid for export.

In fact in summer, in the evening I was able to charge 2 electric cars at the same time by sending power back to the grid!  

In winter, obviously not generating as much, but still about half of what it would have been - that's with 2 heat pumps, 2 electric cars (and no petrol bills), 1 spa as well as the water heating and other uses.

The battery came into it's own yesterday during a planned power outage, where using the app on the phone we could ensure we had 100% stored when the power went out.  The house functioned normally until the power was restored.  The connection to 'stormwatch', also meant the battery started charging automatically recently when potential outages due to a very cold snap, meant we also would have been okay, had we lost power.

The resilience to weather and seismic events along with the savings by self generating, in an environment where I can only see power prices increasing - not least by the recent government decision to cancel a hydro dam (reducing supply) - will mean the system will come into it's own and potentially pack back sooner.”

Secure Your Introductory Offer: Limited Stock Available

With the overwhelming demand for the Tesla Powerwall 3, stocks are limited. Act now to secure your introductory offer. Schedule a free consultation with our experts, and let us guide you through the process of creating a sustainable, energy-efficient home.

Take advantage of your banks sustainable home loans

To make it easier to switch to solar, we offer flexible financing through partnerships with major New Zealand banks. If you're with ASB, Westpac, ANZ, BNZ, or Kiwibank, you can get funding for your solar system with interest rates as low as 0% for up to 5 years. Our team will guide you through the entire process, making it simple to embrace sustainable energy solutions.

FAQ

Frequently Asked
Questions

All your Solar questions answered

How does a Tesla Powerwall work?
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In simple terms, your solar panels absorb sunlight and turn it into energy you can use in your home. This energy flows into your home to power your appliances. Any extra energy is stored in the Powerwall. Additional electricity generated by your system is delivered back to the grid once the Powerwall is wholly charged. Your Powerwall will offer electricity to power your home when the sun goes down, and your solar panels are not producing energy.

How long can Powerwall last on one charge?
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How long Tesla Powerwall will run your home depends on the amount of energy you use with various appliances. With one Powerwall, you will be able to power basic needs in your home for up to 12 hours. This capacity includes lights, electrical outlets, and small appliances.

How many Powerwalls do I need?
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Short answer: it is how much power you want or need to store and the types of devices you want to turn on during a grid outage. Most of our customers purchase two or three Powerwalls. To get a complete sense of how many Powerwalls you'll need, we'll need to discuss your goals and look at your average usage history.

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