It’s good that you’re aware of the requirements with regard to your Owners Corporation’s (O/C) desire to add or make changes to its Common Property. Those requirements as applicable in NSW are shown HERE, and your O/C additionally needs to consider the items shown HERE where the installation of grid-connected solar at our self-managed Plan is covered and a copy of our Special By-Law is provided (gratis).
Encourage your O/C to do its homework as the pay-back is very much less attractive now that the State (NSW) and Federal Government have twice scaled-back the amount ($) of the gross feed-in tariff from the $0.66/kWh that our Plan receives to $0.06/kWh now generally available. Although, now that such subsidies have been withdrawn, the capital cost of solar systems has reduced by around 40%; strange that!
Solar Companies are now flogging the benefits of net metering (as opposed to gross) on the basis that the capacity of the solar system is supposedly matched to the estimated (by them) daytime demand of the Common Property, with any daytime excess going back to the grid (for a miserly $0.06/kWh), and where that grid then provides all the electricity requirements of the Common Property at night, when the Plan my well need it most (cost $0.28/Kwh).
In most instances, depending upon the daytime electricity requirements of the Common Property, net metering is simply not attractive in cost-benefit terms so unless your O/C has committed green motives……