Standalone/Off Grid Solar and Battery Systems

At Volta Projects we design and install small to very large Off Grid/Stand Alone systems with over 10 years of specialist experience in the sector. We are able to install any brand in the marketplace, but prioritise Victron technology for its exceptional build quality, modular design, durability and unmatched performance. With Victron, you also gain access to comprehensive remote support and their top-tier VRM monitoring platform.

We also offer alternative high-quality hybrid solutions that can seamlessly integrate into both grid-connected and off-grid applications. In grid-tie scenarios, our hybrid technology delivers powerful backup support, ensuring that your entire site remains operational during outages.

We conduct a thorough customer needs analysis focused on maximizing return on investment. Our modular systems are designed for scalability, allowing you to easily upgrade components as your energy needs grow. Contact us for a free assessment and proposal.

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Standard Off-Grid System Specifications

The tabs below detail standard single-phase Victron system configurations, along with the minimum battery capacity required to match system output. These setups can be adapted for split or 3-phase operation with the same outputs per-phase.

Both the solar array and battery capacity can be scaled beyond system output based on the site’s energy and storage needs. We begin by assessing the site’s daily energy consumption (kWh) and usage patterns, which help us determine the appropriate solar and battery requirements for optimal 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 installation. Victron systems offer great flexibility by allowing us to limit the generator’s input power while utilising 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 configuration 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 Examples

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

We faced some challenges with limited single-phase grid power at our brewery and restaurant in Wallington, Victoria and relied on a large generator for 3-phase power when needed. To find a more efficient solution, we began exploring our options and discovered Louis from Volta Projects.

Louis provided expert advice tailored to our needs, and Volta designed an ideal system for us. We installed a 45kVa Victron system paired with 40kW of solar panels and a 76kWh battery. This fully automated system integrates seamlessly with our generator. After upgrading some old appliances, the setup now powers both the brewery and restaurant, significantly reducing our power and diesel costs.

Volta Projects has also impressed us with their excellent after-sales support. I highly recommend their services to anyone seeking reliable and efficient energy solutions.

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 discovered Volta Projects while looking for a solar and battery provider for both my home in Hope Island and a holiday cabin on South Stradbroke Island. Louis conducted thorough site visits and provided highly professional and detailed proposals tailored to our needs.

Both systems were installed within four weeks of approval by Volta’s skilled technicians, who also handled in-ground electrical work to power the entire property, including outbuildings. At home, we installed a grid-connected 12kW Noark system with a 24kWh battery, achieving 80% self-sufficiency and uninterrupted power during outages. The holiday cabin is now fully off-grid with an auto-start backup generator. I’m extremely pleased with the high-quality installations.

I’ve recommended Volta to friends and family because of their expertise and exceptional service from start to finish. I strongly endorse Volta Projects for anyone seeking a smooth, reliable experience in their solar and/or battery installation.

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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