Without a suitable roof (or space for a suitable ‘ground array’), a solar system just won’t work.
It’s not just a matter of whacking up some panels and hoping for the best. That’s why there’s a proven process including computer modelling, that we use to check the viability of your overall solar solution.
That process is not just a list of boxes to tick. Your home and power profile will be different to every other family on your street, and there are nuances and potential pitfalls to consider.
We can explain them to you.
Here are just some of the factors to consider when it comes to roof suitability and system sizing.
The exact number of panels you’ll need is based on your daily power use, particularly in winter. Once we know the number, we can check your roof space to see if they will fit. Usually, a system that includes battery storage will require more solar panels, to allow the battery bank can be filled during the day in winter.
Can panels be oriented to the north, or as close to north as possible? While it’s possible to have a ‘split array’ where some panels are facing east and some face west, this can add to the price and complexity of your design.
Even in Auckland, solar panels should ideally be racked up to 20 degrees (or maybe more) to cope with lower sunshine hours in winter. In Auckland in winter, solar noon
(the highest the sun is in the sky) is only 29.7 degrees above the horizon, so this needs to be taken into account. If your north-facing roof is pitched (a gable or hip roof) and there is sufficient space for panels, they can be laid flat on the roof.
Monopitched (flat) roofs will require solar panels to be racked up with special tilt-legs. This can add to the price of your system.
In Auckland, there are a wide range of roof types from corrugated iron, Coloursteel, concrete tiles and more. Different roofs require different approaches to mounting and different design strategies
Remember, roof suitability goes hand-in-hand with the size of your system, and the size of your system always starts with your power use (your power bill).
It’s tempting to guess how many solar panels you might need after watching a few YouTube videos and talking you your neighbour who has solar.
Fortunately, we don’t have to rely on guesswork because we have the tools and deep experience that includes computer modelling combined with data on official sunshine hours for Auckland.
You don’t have to figure it out on your own.