How does a PV solar system work?
A photovoltaic (PV) solar installation consists of solar panels, mounting structures for panels on the roof, electrical wiring, and an inverter. From sunrise to sunset, the solar panels generate direct current electricity (DC) which is sent to the inverter. The inverter converts the DC into alternating current (AC), the type of electricity required for household use.
Is my roof suitable for solar?
Yes, if you have roof space to install solar panels and receive 4-6 hours of sunlight almost daily, definitely you can get a rooftop PV solar system.
But there are a lot of other things that affect how well-suited your roof is for solar, including the location of your property, the angle of your roof, how much sun/ shade it gets throughout the day, any adjacent structures, and how old your house/ property is.
Our solar advisors can help you determine if your roof is a good fit for solar at the moment.
Get in touch, to find out about your roof.
How many solar panels will I need for my energy requirements?
While determining the number of solar panels you will need, consider asking yourself the following questions:
How much power do I need?
Check your electric bills to see how many kilowatt-hours (kWhs) you use throughout the year. A solar consultant will go over this with you in detail during your free solar consultation to figure out your specific energy requirements.
How much direct sun hits your roof?
The number of panels you need depends on how much sun reaches the ground where you are, amount of shading, which direction your roof faces, and any aesthetic preferences you have. All these factors can impact how big your system needs to be.
Still got queries? You can book a free solar consultation with our solar advisors.
How much will I save with a solar system?
Your current monthly energy use and the size of your system will determine your actual savings amount. The system costs around a fraction or a small part of your potential savings, and can start paying for themselves immediately.
Savings will vary based on several factors, including system size, performance, your household's average energy usage as well as any applicable solar credits, tax benefits, and current electricity tariff-rates (net metering) offered by your utility company.
A detailed calculation of your potential return on investment (ROI) will be provided by Green Enpower during your solar evaluation. Get more information about what goes into calculating home solar panel system costs and other important solar energy questions to ask your installer.
Will solar panels increase the value of my home?
Just like any upgrade, installing a home solar system can increase the value of your home and make it more appealing to potential buyers. A 2019 study showed that, on an average, homes with solar panels sell for 4.1% more than homes without solar panels.
Will my panels work on a rainy / cloudy day?
Yes, solar panels are capable of producing electricity in all types of weather all year round, though the amount of power produced does shift with the seasons. You will notice that performance will vary from day to day. Generation can vary somewhere around 70% to 90% due to cloud movements.
During monsoons, the movement of the clouds is more frequent and the power output varies around 50% to 80% of your average monthly generation. Summer is when solar production peaks. While during winters, solar production is on the lower side due to short days and more variable weather.
When we design our systems and estimate their production, we take in to account the amount of sunlight that your specific region receives each year. This means that your system will be sized appropriately for the amount of sunny (or cloudy) days you receive each year. We design our systems with all four seasons in mind, and this seasonal fluctuation will be factored into your solar production estimate.
Will trees/ shade impact my solar performance?
Solar panels provide best output under direct sunlight and shade on your solar panels decreases their efficiency. When we design your system, we account for existing shade on your roof but changes in tree shape or height can increase shade and lead to decreased production over time.
When you go solar, it is best to keep your trees trimmed so they do not block the sun from shining on your panels.
Will my solar system still work well after 25 years?
The solar panels on your roof should continue to produce electricity well past the 25 year mark but their efficiency will decrease slightly over time at an average rate of 0.67% per year.
We design our solar agreements with the lifespan of our equipment in mind and have taken this expected decline in performance into account in our production estimates.
This means that after 25 years, your system should still be operating at around 80% of its original rated capacity and providing your home with clean, renewable energy.
What if my solar panels don't produce enough power?
When your panels don't produce as much energy as you need you will then have to purchase any additional power from the grid. This is not a sign that something is wrong, rather it is a very normal part of the seasonal shifts in solar energy production.
At times, your personal energy consumption may differ due to an unseasonably hot summer needing you to run the air conditioning more than usual. If that’s the case, you may have to use some extra electricity from your local utility, resulting in a slightly higher energy bill for that month. Your solar panels would still produce the amount of power they’re supposed to. Your higher-than-average energy usage will just need an added boost from the grid to support it.
To know more, you can read about the factors affecting your solar energy generation.
Why do I still receive a utility bill with solar?
You still receive a bill from the utility when you have solar because you remain connected to the grid. Even in months where your solar system provides all of the electricity you need, you can expect to pay standard utility connection fees, known as the "Fixed charges" in your electricity bill.
Being connected to the grid is a good thing. It allows you to have power when your are producing less than you need, like on a cloudy day, or during monsoon or when you're running your air conditioning. It also allows you to take advantage of net metering so your solar power never goes to waste.
What is net metering?
Net metering means that your utility will keep track of the solar power that you send into the grid (with the help of a bi-directional meter/ Net-meter) when you are producing more than you’re using. In some months, you may earn credits for this extra power while in others you will need to buy grid power to meet the energy demands of your home.
How long does it take to get the installation done?
The process of having the solar system installed on your roof can be relatively quick — many installations are completed in two to three days.
Before our crew comes to your house, it takes several weeks to prepare your project so that you have the smoothest installation day possible. Whenever possible, we’ll do the work for you, and we’ll keep you updated along the way.
Here’s what we’ll do:
Conduct a site survey to look at your roof and electrical panel
Finalize your custom design
Apply for permits and wait for approval
When it comes time to install the system, we’ll let you know how long the construction process will take for your home and what you can do to prepare.