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Grid Connected Solar and Battery Systems

We deliver high-performance solar and battery systems for grid-connected homes and businesses. We customise grid-tie solar solutions to maximise savings on your energy bills, ensuring a return on investment from day one.

We partner with leading brands in the industry, recommending Fronius, Solar Edge, Sigenergy and Sungrow for their cutting-edge technology, efficiency and reliability in the residential market. These quality brands seamlessly integrate with solar panels and batteries, providing exceptional energy management and long-lasting performance in both single and three phase powered homes.

Our hybrid systems allows you to utilise stored energy during the evenings and backup power during grid outages. This ensures that even during blackouts, your home remains powered, giving you peace of mind. Contact us today for a free consultation and personalised proposal.

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Standard Grid Connected System Specifications

The tabs below provide specifications for standard grid-tied solar system configurations, along with the minimum battery capacity required when a hybrid system is installed. These specifications apply to both single-phase and 3-phase installations.

For residential solar systems, a general rule is to limit inverter capacity to 10kW per phase, with a maximum export of 5kW per phase (inverters over 5kW require an energy meter and export limitation). On single-phase systems, solar arrays typically range from 6.6kWp to 13.2kWp. To optimize performance, the solar array is often oversized by around 132% of the inverter’s output capacity. This ensures that the inverter reaches its maximum output during peak sunlight hours, maximising the system’s efficiency.

3kVa Victron with 9.6kWh Pylontech Battery and 5kWp Solar PV

Application: Boats, Caravans, Tiny Homes

Major Component Specifications:
1 x Victron Multiplus II 48/3000/35
2 x Pylontech LV US5000b, 4.8kWh LiFePO4
1 x Cerbo GX with Touch Screen
12 x Split Mono N-Type PV Panels 440w
1 x Victron Smart Solar MPPT-RS 450/100

Power output: 2.4kW Continuous 4.8kW Peak
Total PV: 5.28kWp
Storage: 7.1kWh Nominal 6.75kWh Usable
PV production (N facing): 7,500kWh/year – 20kWh/day

System Size and Output Requirements

The next key factor in system sizing is the continuous and peak demand of the site which will determine the output required. We conduct a thorough load analysis, considering current and anticipated appliances. Once the data is analysed, we recommend sizing the system with about 30% extra output capacity to accommodate future growth, such as adding air conditioners. Additionally, using gas for water heating and cooking can help reduce electrical load and required storage capacity.

The graphs below show the expected continuous and peak output for standard single-phase systems, adaptable for split or 3-phase configurations with Victron.:

System Output in Ampere at 240V

System Output in Killowat at 240V

Backup Generators and Auto-Start Functionality

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In a well-designed off grid system with a backup generator, a general rule is to match the generator’s output to that of the battery inverter. Victron systems offer great flexibility by allowing us to limit the generator’s input power while utilizing the Victron Power Assist feature. This feature enables the system to combine generator power with battery support to handle inrush loads, while also charging the battery system.

All our systems are equipped with a dedicated generator input on switchover, which powers the site’s loads independently. This setup is particularly useful in case of a system outage or when using low-capacity generators as a manual backup source. For auto-start generators, we typically configure the system to activate the generator when the battery’s state of charge (SOC) falls to 10%, and shut it down once the SOC reaches 30%. This minimizes generator runtime during backup situations.

Generators can also be set for manual operation, which requires user intervention to engage the generator in the event of a low battery shutdown, allowing the system to continue operation.

Off Grid Installations Show Reel

Residential Solar and Battery
Commercial Solar and Battery

Backup Generators and Auto-Start Functionality

PreviousNext
123

In a well-designed off grid system with a backup generator, a general rule is to match the generator’s output to that of the battery inverter. Victron systems offer great flexibility by allowing us to limit the generator’s input power while utilizing the Victron Power Assist feature. This feature enables the system to combine generator power with battery support to handle inrush loads, while also charging the battery system.

All our systems are equipped with a dedicated generator input on switchover, which powers the site’s loads independently. This setup is particularly useful in case of a system outage or when using low-capacity generators as a manual backup source. For auto-start generators, we typically configure the system to activate the generator when the battery’s state of charge (SOC) falls to 10%, and shut it down once the SOC reaches 30%. This minimizes generator runtime during backup situations.

Generators can also be set for manual operation, which requires user intervention to engage the generator in the event of a low battery shutdown, allowing the system to continue operation.

Residential Solar and Battery
Commercial Solar and Battery

Our Service Area

Volta proudly serves the eastern coast of Australia, from Townsville in QLD, to Batemans Bay in NSW, typically within a 3-hour travel radius of our installer locations. For commercial installations, we extend our services across Victoria, the Australian Capital Territory, New South Wales, and Queensland. All our installers are CEC-certified, ensuring expertise in Grid-Tied, Battery, and Stand-Alone/Off-Grid energy systems.

Explore the map below for an overview of our installer locations (click to enlarge).

What Our Customers Say

I first met Louis from Volta Projects in 2021. Among all the solar companies I interacted with, Louis stood out as the most knowledgeable and professional. After thoroughly assessing my energy requirements across different sites, he provided detailed proposals that perfectly aligned with our needs while focusing on maximizing return on investment.

We engaged Volta to install solar solutions for our home, farm, and an off-grid system for our weekend property. Later, we entrusted Louis with designing a highly complex 200kW system for our commercial site in Grafton (Brewhouse Group). The installation was carried out by extremely professional technicians and completed promptly.

I wholeheartedly recommend Volta to anyone seeking energy solutions. Louis and his team exceeded our expectations in every aspect.

I engaged Louis at Volta Projects to install an off-grid system for our farm, his advice was invaluable and the system has worked without fault for years after install.

The system is vital for the running of pumps with water delivery to livestock and running a household. The installation team were also excellent in every aspect and they left the site very clean and tidy.

I also have referred Louis to friends and family including my mother and they also have received great service, tailored products and more importantly ongoing direct support and communication years after install.

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