The system price estimate within the calculator is very general and mid-range. Depending on your appetite for quality and brand will obviously vary this value. Also adding bells and whistles such as electricity monitoring technology and interfaces, which we strongly recommend, can also increase the upfront price.
In the past when there were government funded feed-in tariff incentives, it often made financial sense to oversize your system, however, since the feed-in tariff is now relatively low and no longer incentivised by government it rarely makes sense to buy an over-sized system for the purpose of feed-in tariff credit.
Other things that are not assessed in the calculator include how much space you have on your roof to accommodate the system and if your available roof space has the best orientation and tilt to maximise your solar generation. The best roof orientation and tilt can also vary depending your situation and expectations, for example, if you want to offset time-of-use metering, then facing your array NNW and having a greater tilt angle for the array could offset more peak energy use, as this design style can optimise your system to make more of the evening sun. This is why again, we encourage you to contact Commercial Utility Solutions for your personalised free quote.