Batteries

High-efficiency conversion. Trusted brands. Warranties you can count on.

Energy Stored. Savings Secured.

A solar battery takes your system to the next level by storing the energy your panels produce, so that you can use it at night, during blackouts, or when grid prices spike. It’s the key to true energy independence. That’s why we only install premium battery systems from trusted brands like Sigenergy and Tesla, built for safety, scalability and long-term performance. Whether you’re powering a home or a business, our batteries give you greater control, more savings, and energy you can count on day or night.

Sigenergy - Sigen Store

8kWh – 48kWh

Smart, scalable energy storage built for the future of home and business power.

Modular design – Stackable up to 48kWh for homes or 480kWh for commercial systems
Real-time monitoring – Control and optimise performance with the mySigen app
Advanced safety – AI-powered thermal sensors, internal fire suppression, and 5-layer protection
Built to last – Large-capacity 280Ah cells, IP66 weatherproof rating
EV-ready – Supports V2H and V2G for electric vehicle integration and virtual grid support
Instant backup – 0ms switch to backup power for uninterrupted energy during outages
10-year warranty – Long-term peace of mind with future-ready technology

Tesla - Powerwall 3

13.5kWh

All-in-one home battery solution with the power, design, and reliability Tesla is known for.

High-capacity storage – 13.5kWh of usable energy to power your home day and night
All-in-one system – Integrated battery, inverter, and energy gateway for seamless setup
Real-time monitoring – Use the Tesla app to track usage, solar production, and backup status
Backup protection – Automatically powers essential loads during outages
Scalable design – Stack multiple units for even greater storage
Durable build – Floor or wall-mounted, weather-resistant, and designed for outdoor or indoor use
10-year warranty – Backed by Tesla for long-term performance and support

Why Quality Batteries Matter

Investing in a quality battery means:

Reliable backup – keep the lights on during outages or blackouts
Smarter energy use – store solar power for use when grid rates are highest
Seamless integration – works smoothly with your inverter and solar setup
Safe, long-term performance – built-in protection and long-lasting cell design
Greater independence – reduce reliance on the grid and take control of your power

10 Year Workmanship Guarantee

Ongoing Lifetime
Support

10 Year
Warranty

OTHER PRODUCTS

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Inverters

      
 Excellent5.0136 reviews
 5.0
 Excellent136 reviews
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      Posted on Google  
   
   Mike Christie 
 9 days ago
 
 
 Trustindex verifies that the original source of the review is Google. We recently had Ecoefficient Solutions NZ install our new solar system and couldn’t be happier with the whole experience. From the initial consultation and advice right through to the final installation, the service was excellent. Communication was clear throughout, the team were professional and easy to deal with, and the quality of the workmanship is outstanding.

We were also really impressed with the quality of the products and equipment they use. The finished installation is extremely tidy and has been completed to a very high standard. It’s clear they take a lot of pride in their work.

We’re very happy with the system and wouldn’t hesitate to recommend Ecoefficient Solutions NZ to anyone considering solar.
  
 
     Posted on Google  
   
   Kevin England 
 11 days ago
 
 
 Trustindex verifies that the original source of the review is Google. We recently had a solar power system installed by Ecoefficient Solar and couldn’t be happier. The whole process was handled efficiently, professionally and with great communication.
As a novice, we’ve learned a lot about solar power and how to make the most of our investment. I would have no hesitation recommending and supporting this excellent local provider.
  
 
     Posted on Google  
   
   Karen Bates 
 13 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Exceptional service, great contact and communication.  Felt like what we were wanting to achieve was listened to and did not try to oversell us what couldn't be done, or we didn't need. On install days the team worked really well together and had good processes in place. We would be very happy to recommend Shaun and the team at Ecoefficient. Looking forward to learning our new Solar world :) Thank to Shaun, Laura and the team.
  
 
     Posted on Google  
   
   Jude Grant 
 30 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Shaun and the team have been absolutely amazing to work with. No question was too stupid, no issue was too small. From start to finish extremely happy with the solar set up we have. Looking forward to those long summer days now knowing that we are producing our own electricity. Local to Hawke's Bay was a big plus for us as well. Thanks Shaun and the team. Highly recommend Eco Efficient. 10/10
  
 
     Posted on Google  
   
   Helen Pirihi 
 35 days ago
 
 
 Trustindex verifies that the original source of the review is Google. We are very happy with our system design and install.  Throughout the entire process communication was great and everything explained thoroughly.  Special mention to the install team who endured possibly the 2 coldest days of the year on our roof! The ongoing support available post install with meter changes and app help was a key in choosing eco-efficient and has been excellent.
  
 
     Posted on Google  
   
   Michael Park 
 36 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Laura, Shaun and their team are excellent.  They listen to your needs, work out your future requirements and are upfront, transparent and very professional. I would highly recommend them to anyone considering going solar.  Team were efficient, courteous and did an excellent job. Very happy.
  
 
     Posted on Google  
   
   Chris Bidwell 
 116 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Thanks to Shaun and the team for our recent awesome solar installation. Everything was handled professionally and we are delighted with the result.
Cheers, Pam and Chris Bidwell
  
 
     Posted on Google  
   
   Philip Morton 
 134 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Very professional team, covered all my questions and fantastic service. In particular it was great to have a solution installed for us on quite a small house. Excellent!
  
 
     Posted on Google  
   
   Steve Hughan 
 145 days ago
 
 
 Trustindex verifies that the original source of the review is Google. We chose Ecoefficient to install our solar panels, inverter and battery setup. From the initial contact, site inspection, inquiry of what we were trying to achieve, quotation, installation, inspection, and commissioning, everything has been handled with professionalism and a friendly attitude. We are so glad we went with Ecoefficient, and it feels good to support a local business. rgds, Steve & Irene
  
 
     Posted on Google  
   
   Brett Mead 
 164 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Deciding on solar is a process that brings up numerous options, jargon and technicalities that can quickly become confusing. Shaun at Ecoefficient solutions guided us through the process of choosing a system that suited us, vs simply achieving a sale. Shaun’s knowledge, expertise and common-sense approach as well as his patience with our questions provided us confidence and the communication throughout the install process was excellent. The install team were friendly, tidy and treated our install as though it was their own house. Very happy with the results and the system and have great confidence in knowing the service continues past the system being completed.