While this seems like a no-brainer, it really is one of the very last questions you will get while deciding which sort of solar energy system to set up.
The first thing you’ll need to figure out is just how much electricity your home currently uses.
You will have to find a copy of your most recent power bill to figure out the answer to this question. Keep an eye out for your estimated daily use, as this will help you figure out how many solar panels you need. Your power use will be shown on your statement in kWh or units on certain invoices. If no regular average value is available, just divide the monthly and yearly average by 30 or 365 to obtain the regular estimated value.
What Are Your Plans for Saving Money with Solar Panels?
Would you like to counterbalance, break even, or gain a profit from your power company each quarter?
Your savings estimates, as well as many other criteria like location and setup circumstances, have a direct influence on the number of panels you will place on your home. Because solar panels need sunshine to function, regions with more sunshine hours (for instance, Perth) will need less panels to obtain the very same effect as those with fewer sunshine hours (for example, Hobart).
Solar panel shadow, direction (which direction they face), shifting weather, and environmental conditions are all elements that have an influence on energy generation. To compensate for these fluctuations, your solar energy provider can add a little cushion to your average daily generation.
Choosing The Best Solar System to Fulfil Your Energy Requirements
You can figure out what size setup you need by looking at your recent energy costs. As a general approximation, many of the most typical system sizes are roughly 6kW, which might be suitable for houses with an average power expenditure of $450 every billing period. But, if you do not consume much power and your monthly expense is around half that amount, a 3kW system might work for you.
It’s crucial to evaluate whether your power generation may change in the future, such as if your family expands, if the children leave the house or perhaps even if you want to build a pool, since this may affect your electricity use. It’s usually a good idea to design your system to accommodate any future adjustments so you can get the most out of it.
Recent developments in feed-in tariff prices in some jurisdictions have prompted a change in perception in Australia about the proper size of home solar energy installations.
It used to be quite profitable to sell your PV electricity to the grid, but with feed-in tariffs decreasing, it is now typically more profitable to self-consume the power generated by the installation. Feed-in tariffs for electricity not consumed by your home are still available, so you do not have to stress about your solar panels producing a lot of extra unused energy.
Selecting The Best Solar Panels for Your Home
To guarantee that you have the right-sized Solar Energy system for your home, you must consider a number of criteria. Various angles will enable your solar panels to create more power because of the sun’s activity during the day.
North-facing solar panels are indeed the best option for maximum solar access in Australia because this direction receives steady sunlight during the day.
Although approaching north is often not a possibility for all houses, you may still get positive results if your solar panels approach north and east or north and west, which would only yield around 5% less solar power than panels pointing directly north.
When a north-east or north-west direction is not possible, the east and west directions would be the next main priorities for solar generation.
East-west facing solar panels create roughly 11% less power than north-facing solar, but they still create an adequate quantity of power and, if used properly, may save your household a substantial amount of money.
There are a few other factors to take into account when deciding where to install your solar energy system:
Trees, high buildings, and any other object that throws a steady shadow on your rooftop can significantly decrease the supply of sunlight to the solar panels.
- The Angle of The Roof
A perfectly level roof is not suitable for solar panels; instead, a roof slanted between 15 and 35 degrees is preferable, but a roof rack will allow for an extra tilt structure to position the panels appropriately.
- Roof Openings, Whirlybirds and Skylights
These are all extra factors to consider when determining the best location for the solar panels.
How Many Solar Panels Will Your Home Require?
You may simply divide kW needed by the performance of each and every panel when you have picked whichever solar panel type to set up.
It will show exactly how many solar panels you will require for your house.
Keep in mind that not every solar panel is the same size, both physically and in respect of productivity. For a 3 kW installation, solar panels with a potential range of 250 W to 265 W (this is pretty common) would be required.
A small home with 1-2 people living there may only require a solar system of roughly 2kW meaning 8 solar panels. 8 solar panels could potentially cover:
- Energy Efficient Lights (less than 10)
- LCD TV
- Standby Appliances
- Washing Machine (Not more than 1 load a week)
- Dishwasher (Not more than 2 loads a week)
A 4kW solar system meaning 14 solar panels may be required for a modest home with 2-3 people living there.
14 solar panels could potentially cover:
- Down lights (10-20)
- LCD TV
- Standby Appliances
- Washing Machine (Not more than 3-5 load a week)
- Dishwasher (Not more than 5 loads a week)
- Small air Conditioner
A large family of four or more persons may require a 5kW+ solar system meaning 24 or more solar panels.
24+ solar panels could potentially cover:
- Halogen Lights (20+)
- Plasma and multiple TVs
- Standby Appliances
- Washing Machine (More than 5 loads a week)
- Clothes Dryer (More than 5 loads a week)
- Dishwasher (More than 5 loads a week)
- Large or multiple air conditioners
- Pool Pump
What Not to Forget When Considering Solar Panels?
Solar panels will generate power while the sun is shining, and you may sell the rest to your supplier. For every kWh or unit, you give back to your distributor, you will have between 5c to 10c. Consider this one in your estimates since, even if you produce sufficient power to fulfill your needs, if most of your utilization occurs at nighttime, you will not see the economic benefits you want.
You must use the electricity you create and limit the quantity you release to improve your benefits.
This can be aided by smart design. Positioning solar panels on the western side of the house, for example, helps boost midday generation, which is perfect for families that use an air conditioner or bake afterward in the afternoon. Load shifting – which really is a sophisticated way of expressing “consuming more power throughout the day” – is another tactic against nighttime. While PV solar production is at its peak, this may involve swim cleaners, dishwashers, or refrigerators.