In October 2013, Excel Solar Pty Ltd successfully completed the 26.52kW solar installation on the Rangeville Communtity Church. This installation comprises of 104 x 255W CNPV Premium Monocrystalline Panels paired with 2 x  Fronius IG Plus 120V-3  3-Phase 10kW Inverters.

Excel Solar believes this system is a shining example of where the solar industry needs to be at a small commercial level in terms of quality of system and technology available.

The system itself is state of the art in its ability to monitor and report to the client and installer in all aspects of its operation and potential servicing needs. All of the components have been chosen for performance and safety and installation practices have been aimed at the long term performance, reliability and ease of after sales service rather than from short term gains with uncertain future potential.

The Addition of AC Grid monitoring combined into the Solar Monitoring interface is a first for the Tigo Energy system within Australia at the time, and we believe still to date. This not only adds to the knowledge base here in Australia but to the industry as more commercial systems will look to incorporate this as a mandatory feature rather than an option.

At its simplest this system contributes to the industry by being the very latest in available technology, and installed at the very highest of skill and quality levels without compromise.

Project Details

Client:                                    Rangeville Community Church
Location:                               Rangeville, QLD
Date Completed:                   October 2013
Solar System Capacity:        26.52kW
Module:                                  255W CNPV Premium Monocrystalline Panels
Inverter:                                 Fronius IG Plus 120V-3  3-Phase 10kW Inverter
Green Savings:
Solar Electricity Generated:


The clients criteria was somewhat unique from the basis of design specifications, and the actual impetus that prompted the initial enquiry.

A congregation member had, in their will, left money to the church with strict insructions to install a solar system that would not only benefit the church, but be an addition to the award winning buildng the Church could be proud of and help to educate the members about solar and energy management.

Along with the above criteria, Excel Solar also had to meet the following:

1. Provide a system within the allocated budget.
2. Design a system that does not feed excess power to the grid.
3. The system was to utilize the available roof areas.
4. The system was to have monitoring capabilities.
5. The installation was able to have additional panels added at a later stage.


The clients first criteria for the system were met by supplying a fixed price quotation & design which was within the specified budget of the client. The system was installed and commission within budget.

Installation was streamlined by utilizing a crane to deliver all components to the roof within 2 hours of arriving on site, reducing labour costs and reducing the overall time and inconvenience on site to the client.

Excel Solar designed a system that fed a minimum of excess power to the grid. The generated power from the Solar Array was to be predominately used within the premises, as the Client was not receiving any feed in tariff, this was a major concern to the client. The addition of AC grid Monitoring enabled the client to actively manage power usage within the building to maximize the usage of the available Solar power and minimize the usage of Grid sourced power within the facility.

The design brief from the client was that the installation of a system makes best use of the available roof area and to blend into the building design as best as possible.  The client was happy for the system to be visible, but wanted it to be unobtrusive. The Building had won architectural and design awards, so this was an important consideration.

The chosen roof area provided sufficient area for the initial array installation and the later planned expansion of the system. This roof also provided the best solar irradiation levels from minimal shading potential and being closest to North.

The ability to monitor of the system was an important design criteria specified by the client and Excel Solar met this request by integrating a Tigo Energy Maximizer installation to the system. The Tigo system incorporates dual maximizers fitted to pairs of panels, which enables the monitoring of the system at an individual panel level.

Monitoring is conducted by Excel remotely and if required remote shutdown of the system can also be performed by Excel. The client monitors from within the facility from desktop computer, and can also monitor via a smart phone or tablet device by way of a free application provided by the supplier, Tigo.

The client prior to the initial installation took up the expansion capabilities built into the system. This was incorporated into the initial presentation to the client to show the expansion capability of the system. The initial installation was to be 20.4kw of array with the 2 x 10kw 3-phase inverters.

Following the installation and commissioning of the system all subsequent  discussions with the client has proven that design criteria from the initial brief have been met and exceeded by the system installation from Excel Solar.


The overall financial positions were highlighted in a calculated True Payback period of only 4.9years. An internal Rate of return on the money invested into the installation of the Solar was 23.1%. A 16.4% return on investment was the overall figure put to the church as a decisive figure to compare against other potential variable investment choices.

Not only does this system have a financial benefit but it also has a great environmental benefit as well. The entire congregation and surrounding suburbs are now aware of the benefits of solar and the ongoing savings enjoyed by the church, and wider solar community as a whole.

Plus, this system is effectively the environmental equivalent of 428 trees planted and saved 13,107.32kg of CO2.