Essential Questions to Ask Solar Companies Before You Sign a Contract

Joe Brennan
Jun 18, 2025

Thinking about going solar? It’s a big step that can help cut your energy bills and lower your impact on the environment. But before signing any contract, it’s important to understand what to expect and what to ask.

Not all solar companies offer the same level of service, so asking the right questions can help you avoid surprises and make a smarter choice. In this blog, we’ll guide you through the most important questions to ask about quotes, equipment, warranties and the installation process.

With the right information, you can feel confident about your decision and get the best value for your home. Whether you're just starting to explore or ready to move ahead, this guide will keep you on the right track.

Essential Questions to Ask Solar Companies Before You Sign a Contract

Once you've done your homework and decided that solar energy is the right choice for your home, the next step is to contact a reputable solar company. They’ll assess your property, check for any shading or obstacles, and give you a personalised quote. This will include how many panels you’ll need, what it will cost, and how long it’ll take for your savings to cover the cost.

At this stage, you’ll probably have quite a few questions. You might not even be sure what to ask – and that’s completely normal.

To make things easier, we’ve grouped the most important questions into five simple sections:

1. What to Look for in a Solar Quote

A good quote should give you all the details you need to make a confident decision. Be sure it includes:

  • The make and model of the panels they’re recommending

  • The number of panels and total system size (in kilowatts)

  • A 3D image or satellite photo showing how the panels will look on your roof

  • Details about the inverter or microinverter

  • How much electricity the system is expected to produce each year

  • Estimated yearly savings, including expected increases in energy rates

  • Any solar incentives or rebates you may qualify for

  • Total system cost (with and without incentives), shown in cost-per-watt

  • Financing options – such as loans, leases, or paying outright

  • Warranty details for all parts of the system

2. Questions to Ask the Solar Installer

It’s important to work with an experienced and properly certified installer. Here’s what to ask:

  • How long have you been installing solar panels?

  • How many systems have you installed?

  • Are you certified by NABCEP (the North American Board of Certified Energy Practitioners)?

  • What’s your business licence number?

  • Can you provide references from at least three happy customers?

  • Do you use subcontractors? If so, how do you make sure they do a good job?

Installers with plenty of experience are more likely to understand local regulations and utility company requirements. If they use subcontractors, that’s not necessarily a bad thing – just ask who’s responsible for what and how the work is managed.

3. Questions About the Equipment

Not all solar panels are created equal. Some companies use cheaper panels to cut costs, but they may not last as long or perform as well. Here are some questions to help you understand what you’re getting:

  • Why have you chosen this particular solar equipment?

  • Do you use the same system on your own home or business?

  • What warranties come with the panels, inverter, and other parts?

  • Have your customers had any issues with this equipment?

  • Who do I contact if something goes wrong?

  • Can I add a battery now or later – and how much would that cost?

  • Do I need anything to stop animals getting under the panels?

About Warranties

Check that the panels have at least 25 years of power production warranty and ideally 10 years (or more) for workmanship. Some manufacturers now offer 25 years on both.

About Batteries

Adding a battery means you can store energy for use when the sun isn’t shining or during power cuts. It can also help you save money if you use that energy during peak-rate times. Fitting a battery during the initial installation can also lower labour costs compared to doing it later.

About Animals

Most homes don’t have issues with animals, but birds or squirrels can sometimes damage wiring. Ask if other customers in your area have had problems and if they recommend critter guards or other protection.

4. Questions About the Installation Process

Once your quote and payment plan are sorted, it’s time to install your panels. Make sure you understand the steps involved:

  • What are the stages of the installation?

  • How long will the full process take?

  • What happens if you’re delayed?

  • Do you guarantee your workmanship?

  • What if my roof develops a leak after installation?

Understanding the Process

A reliable installer should be able to give you a rough timeline and stick to it. Some things, like getting permits and booking inspections, are out of their hands and may slow things down. Still, they should manage these steps and keep you updated.

Generally, the full process can take from a couple of months up to a year, depending on the situation. It starts with a site survey, followed by design approval, permitting, installation, inspection, and finally, permission to connect your system to the grid.

Conclusion

Thinking about going solar? It’s a big step that can help cut your energy bills and lower your impact on the environment. But before signing any contract, it’s important to understand what to expect and what to ask.

Not all solar companies offer the same level of service, so asking the right questions can help you avoid surprises and make a smarter choice. In this blog, we’ll guide you through the most important questions to ask about quotes, equipment, warranties and the installation process.

With the right information, you can feel confident about your decision and get the best value for your home. Whether you're just starting to explore or ready to move ahead, this guide will keep you on the right track.

Planning a switch to solar energy?

Contact Going Solar now and Get Free Advice & Quote Within Minutes!
Get A Free Quote

Frequently Asked Questions

What should a good solar quote include?

A proper solar quote should list the panel model, system size in kilowatts, inverter details, expected yearly output, and projected savings. It should also show the full cost, available incentives, finance options, and warranty details.

How do I know if a solar installer is reliable?

Ask how long they’ve been in business, how many systems they’ve installed, and if they are NABCEP-certified. A trustworthy installer will also have a licence, insurance, and references from past customers.

What equipment questions should I ask a solar company?

Ask why they recommend specific panels, what warranties are included, and whether they use the same system themselves. You should also find out if others have had issues and who to contact if something goes wrong.

Is it worth adding a battery to my solar system?

Yes, especially during installation. Batteries help keep power running during outages and can reduce your bills by using stored energy during peak-rate times. It's often cheaper to install a battery with the system rather than later.

Do animals cause problems with solar panels?

Sometimes small animals like squirrels or birds can get under the panels or chew wires. Ask your installer if this is common in your area and if they recommend critter guards for extra protection.

What does the solar installation process involve?

After the quote and payment plan, the installer will carry out a site visit, apply for permits, install the system, and arrange inspections. The full process can take two months to a year, depending on local approvals.

Contact Going Solar Now!

Get a FREE Consultation & Quote

Fill out the form below to book a free consultation with one of our experts and also receive a no-obligation quote.

Check - Elements Webflow Library - BRIX Templates

Thank you

Please check your inbox to download your Free EBook!
Oops! Something went wrong while submitting the form.
*FYI, parts of this blog post were drafted by artificial technlogy. But rest assured, it's been thoroughly researched, edited, reviewed and me & my team.
Author Fahad Zahid
Founder @ Going Solar

Joe Brennan, the founder of Going Solar, is dedicated to making solar power mainstream in Ireland and meet SEAI objectives. With a focus on affordability and sustainability, he is bringing renewable energy solutions to homes, reducing costs & environmental impact.