Werribee: 4.23 kW solar + SigenStor 16.1 kWh battery added to existing solar (September 2025)

Posted October 19, 2026

A 4.23 kW solar extension and a 16.1 kWh Sigenergy SigenStor battery for a home in Werribee that already had solar, with a full 12 months of measured results.

Location: Werribee, Wyndham
Switched on: September 2025
System: 4.23 kW of new solar panels with a 16.1 kWh Sigenergy SigenStor battery, added to the home’s existing solar

Based in Geelong, we also install in Werribee when the work comes up. This homeowner already had solar panels and asked our team to add more solar and a Sigenergy SigenStor battery.

The system was switched on in September 2025, so it now has a full 12 months of measured results.

4.23 kW

of new solar panels added

16.1 kWh

Sigenergy SigenStor battery

8,721 kWh

of solar in 12 months (new + existing)

96%

of the home’s power from its own solar and battery

What the homeowner wanted

More solar alongside the panels already on the roof, and a battery to store it.

“A great company for providing the install of our battery and additional solar panels. Huge thank you to Luke, Brad, Elly and team for the support through out the process. Couldn’t recommend the team more highly!”
Fred, Google review

What we installed

The SigenStor has a solar inverter built in, so the new panels connect straight to it. The home’s existing solar keeps its own inverter, and the Sigenergy system measures it too, so all of the home’s solar shows in one place.

4.23 kW of new solar panels added alongside the existing panels
Sigenergy SigenStor: two battery modules (16.1 kWh) with a built-in 6 kW inverter, installed outside on a paved base
Existing solar connected to the monitoring: its output is recorded by the Sigenergy system with the new panels
Installed by our team: designed and installed by our installation team.

Results so far

In the 12 months from 1 October 2025 to 30 September 2026, the new 4.23 kW of panels generated 5,064 kWh and the home’s existing solar added 3,658 kWh: 8,721 kWh of solar in total. The battery discharged 1,918 kWh over the year.

Over the same year the home used 2,562 kWh and drew only 94 kWh from the grid, so about 96% of the home’s electricity came from its own solar and battery (1 − 94 ÷ 2,562 = 96%). Even in winter (June to August 2026) the grid supplied just 61 kWh of the 612 kWh the home used. A further 5,912 kWh was exported to the grid.

Source: Sigenergy monitoring for this system, 1 October 2025 to 30 September 2026 (365 of 365 days recorded).

Thinking about adding solar and a battery?

GET A PRICE GUIDE

SEE ALL CASE STUDIES

Recent Posts

Barry Sherwell

Great service with Solar and Battery install. I would recommend Velocity Solar too anybody

grant gibson

Excellent service from the Velocity team!

Penny Stevens

Velocity Solar were excellent, very thorough and kindly and respectfully answered my (sometimes stupid!!) questions. I have recommended them to several people, and used them originally because I was recommended to them by someone who was extremely "picky" and gave them a glowing and well deserved recommendation, from the office girls to the cheerful installers. Well done Velocity Solar and thank you!!!

Graeme Faithfull

A professional installation. Timely and friendly staff

George Judkins

Velocity Solar installed a 13.2kW solar array and 32kW of Sigenergy batteries for us in April. They delivered a quality outcome through a high standard of workmanship. All staff throughout the process were friendly and totally professional. As we had a positive experience with the solar install, we engaged Velocity Solar to facilitate the installation of a Reclaim Hot Water Heat Pump in July. Again, we are very pleased with the outcome.

Ella

We had a fantastic experience with Velocity Solar! We have a very steep roof (45 degree pitch), and 5 other solar companies had turned us down before we finally got in touch with Velocity Solar - I only wish we had known about them sooner. Luke was very thorough during the initial consultation and quotation process. He provided several options for system sizes and configurations to meet our objectives and budget, and gave us confidence in the system we ultimately decided to proceed with. The owner also visited our house well before the installation was booked in, to confirm any complexities with the install (due to the pitch of the roof) could be considered well in advance. As a result, the entire installation process was very smooth and everyone we dealt with along the way was lovely. I would highly recommend Velocity Solar to anyone looking to add a solar system to their home!

Jennifer Mundy

Velocity Solar were professional to deal with from the outset. Follow up was prompt, appointment times were kept, and information was clear. The installation was neat and the installers were a pleasure to deal with. Highly recommend.

Milton Howard

Velocity solar installed batteries in our house with existing solar system. The team arrived on time, answered questions and were very pleasant to deal with. Job completed in 3 days and system works exactly as quoted. Many thanks to Brad and the team for a job well done. P.S At another time they helped us sort out pigeon problems with our solar panels. A difficult job but excellent result.

Neville Pearce

We are very pleased to have worked with Velocity Solar to install our Solar system, Battery and Car charger. The team understood our requirements and exceeded our expectations. Luke from Sales and Marketing took the time to determine our installation details, met on site to discuss our needs and updated our quote based on our conversations. Brad (Business Owner), Tim and the installation team did an amazing job. Maximising the number of panels installed on the available roof area, installing connecting cables neatly in the roof, cable duct and behind the weatherboards. The Battery and Car charger installation was just perfect. Installing the fire protection to a high standard and permitting me to paint behind the equipment prior to its installation. Installation was booked prior to Christmas and the team confirmed if they could commence the installation earlier than scheduled - resulting in the system being operational ahead of schedule. Brad took the time to run us through system operation and connection to the internet, which was very appreciated. Emily and Danielle from the Office arranged the safety inspection and the update to our smart meter by our power distributor, and took care of all the administration details. Very easy. I would highly recommend the team at Velocity Solar, they made everything very easy and the quality of work was outstanding. We are very pleased with the system performance. Thanks to all the team at Velocity Solar.

Michael Murphy

Great customer service,courteous always available. Could not recommend them more highly. Our system is up and running exceeding our expectations. Thank you