15 Mistakes to Avoid When Installing Solar Panels

e at SunValue are solar’s biggest cheerleaders, always rooting for everyone to make the switch. The benefits are too good to ignore: shrinking energy bills, the freedom of self-made energy, and the peace of mind that comes from doing your part for the planet.

But we won’t sugarcoat it: the journey to going solar can have its hiccups. There are plenty of steps involved, and you’ll want to avoid any costly mistakes along the way. That’s why we’ve rounded up the 15 most common mistakes new solar adopters face and the best ways to avoid them. Let’s jump in!

Mistake #1: Not Analyzing Energy Consumption

One of the first and most critical steps in planning a solar installation is accurately assessing your energy needs. Many homeowners rush into solar projects without taking the time to evaluate how much energy their household consumes, leading to systems that are either too small or excessively large for their needs.

Why It Matters

Nailing the right size for your solar panel system means hitting that sweet spot for both energy efficiency and savings. If it’s too small, it won’t cover your energy needs, and you’ll still have to rely on the grid. If it’s too big, though, you'll generate more power than you can use, and it might end up going to waste.

How to Avoid This Mistake

• Look Back at Your Bills: Go through your electricity bills from the past 12 months to get a clear picture of how much energy your home consumes.
• Install a Smart Meter: These devices help you see exactly how much electricity you're using in real-time.
• Use Monitoring Apps: Sync a special app with your meter to spot your consumption patterns.

Mistake #2: Skipping Roof Checks

Some homeowners jump straight into installing solar panels without checking if their roof can handle them. Remember, your roof’s material and condition are key to a safe, efficient solar system—don’t skip this step if you want things to run smoothly.

Why It Matters

Neglecting a proper roof check can bring unexpected trouble. Solar panels are quite heavy, and if the roof isn't sturdy enough, it could sag under the added weight or even collapse. Plus, small unseen issues could lead to costly repairs or replacements shortly after solar panel installation.

How to Avoid This Mistake

• Plan Roof Repairs: If your roof is reaching the end of its lifespan—usually 20 to 25 years for asphalt shingles—it’s a good idea to replace it before installing solar panels.
• Hire a Professional: Bring in a certified structural engineer or a solar expert to inspect your roof and make sure it's solar-ready.

Mistake #3: DIY Installations Without Expertise

Tempted to go DIY with solar installation? It’s easy to see why. Professional works don't come cheap, and doing everything yourself could mean lower labor costs and faster return on investment. And for those who love a fun challenge, installing a solar system might sound like the perfect weekend project. But fair warning: without the right skills, the risks far outweigh the savings.

Why It Matters

Self-installation involves dealing with electricity, which can be quite dangerous. Safety should always be a top priority because incorrect wiring or setup can lead to electric shocks or even cause fires.

Then there's the challenge of correctly sizing your system and linking it to the grid, which can also be tricky if you're not a professional. Making mistakes here can lead to inefficiencies and serious damage that's hard and expensive to repair.

Besides, opting for a DIY solar project might mean losing out on warranty protection and missing eligibility for certain incentives or rebates.

How to Avoid This Mistake

• Safety First: If you’re experienced with wires and up for some DIY, be sure to wear safety gear, such as insulated gloves, and follow your local electrical codes. And when it comes to connecting to the grid, it’s best to call in a pro electrician to handle that final step.
• Engage an Electrician: Even if you take on most of the installation yourself, it’s important to bring in a licensed electrician for the final connection to the grid.
• Get a Professional Installer: If you’re even a little hesitant about your skills, it's best to leave it to a certified installer.

Mistake #4: Choosing Unreliable Contractors

So, you've decided to go with a solar installer. Now, here’s the next step: finding the right one. The effectiveness of your solar panels depends a lot on how skilled and reliable your installation team is. Many solar-goers chase the lowest price, but end up dealing with hidden fees and technical problems later.

Why It Matters

When it comes to solar panel installation, a job half done can leave you with less energy and savings than you bargained for. And that’s not all—mistakes in wiring can lead to dangerous situations like roof leaks or even electrical fires.

Mistakes can happen not only with the technical side of things but also with the paperwork. Should your contractor slip up with the permits, your solar system might not be able to connect to the electrical grid, costing you both time and money.

How to Avoid This Mistake

• Check the Credentials: Verify if the contractor is certified by NABCEP—the industry’s benchmark for quality.
• Gather Feedback: Browse online reviews and ask for references from past clients.
• Ask Key Questions During Consultations:

• What warranties do you offer on labor and equipment?
• Can I see some examples of similar work you’ve done?
• How do you take care of the red tape like permits and inspections?

Mistake #5: Low-Quality Panels or Components

Cutting costs by buying cheap solar panels or components can feel like a win at first, but this decision can come back to haunt you down the line.

Why It Matters

Low cost solar panels typically underperform and have a shorter lifespan. While pricier panels add about $2,000 upfront, they pull more power from each square meter, translating into better savings over time.

The same goes for budget inverters, connectors, or mounting systems—they tend to wear out sooner, causing annoying downtime and unplanned expenses. So, what seems like a bargain today could mean higher bills or lower energy savings later.

How to Avoid This Mistake

• Do Your Research: Buy panels and components from well-known manufacturers that have great reviews from customers.
• Check Certifications and Warranties: Look for products with industry-approved certifications (like IEC) and good warranties—usually around 25 years for panels and 12 years for inverters.
• Consult with Pros: A knowledgeable solar installer can recommend top-notch equipment that fits both your unique needs and budget.
• Avoid Too-Good-to-Be-True Deals: Rock-bottom prices can mean lower quality or fake products.

Mistake #6: Miscalculating Installation Costs

Setting up solar power is an all-encompassing endeavor that comes with a mix of costs. It's easy to overlook the full picture, resulting in some unwelcome surprises in the future.

Why It Matters

Solar adopters might not think about how the costs of their new system include more than just the equipment. Labor, permits, and inspection fees can significantly add to the total. Sometimes, homeowners even start the process without considering unique project requirements, such as special mounts or roof reinforcements. The result? A serious hit to their wallets or a solar setup that never quite gets completed.

‍

Chart: SunValue; Data Source: National Renewable Energy Laboratory (NREL)

How to Avoid This Mistake

• Get Detailed Quotes: As you gather estimates from installers, make sure to get a detailed list of all costs.
• Consider Future Expenses: Set aside some funds for upcoming maintenance or upgrades, like adding battery storage.
• Look out for Hidden Fees: Some firms might skip mentioning permit fees or other charges in their first quote. Always double-check what's included to steer clear of surprise bills later on.

Mistake #7: Missing Out on Incentives

There are numerous incentives for solar energy that can help cut down on installation costs. Yet, many homeowners and businesses across the US miss out on these golden opportunities.

Why It Matters

If you're not taking advantage of available tax credits and rebates, you could be paying more than you need to. For instance, the U.S. federal solar tax creditlets you deduct 30% of your installation costs. Also, local incentives differ by state and can help make going solar even more affordable.

How to Avoid This Mistake

• Research Incentives: Before getting started, take the time to look into the benefits available to you. The Database of State Incentives for Renewables & Efficiency (DSIRE) is a great resource to see what options you have.
• Work With Experienced Installers: A reliable solar provider will help you apply for tax credits and rebates, so you won’t miss out on any savings opportunities.
• Stay Updated: As incentives can shift from year to year, staying in the loop is key. Some programs may expire or decrease benefits over time, so it's best to act sooner rather than later.

Mistake #8: Inaccurate ROI Calculations

One common pitfall is being too optimistic about how much money you’ll save with solar power. It's easy to forget that things like overcast weather and changing electricity rates can cut into the returns you hope for.

Why It Matters

If you don’t get your savings calculations right, you might develop overly ambitious financial expectations. Yes, solar power can significantly cut your energy costs, but unrealistic expectations about your return on investment (ROI) might leave you feeling let down.

How to Avoid This Mistake

• Consider Local Factors: Look into your area's utility rates and how they change, as well as the typical amount of sunlight your region receives throughout the year.
• Account for Degradation: Solar panels lose about 0.5% to 1% efficiency each year. Make sure your financial plans factor in this dip in output.
• Use Accurate Tools: National Renewable Energy Laboratory's PVWatts Calculator or SunValue calculatorcan help you estimate how much sunlight you can turn into savings.
• Work Closely with Your Installer: Regular communication helps keep your budget in sync with the project and gives you a clearer idea of your future returns.

Mistake #9: Not Following Utility Rules

When you buy solar panels for home, it’s important to understand the rules set by your utility company. Each utility has its own specific policies about solar integration, such as grid connection fees and incentive offers.

Why It Matters

Unfortunately, not all utility companies offer attractive net metering policies that let you earn credits for surplus solar power. Some also might set limits or charge extra fees for connecting your solar system to the grid. If you don’t ensure your setup meets these requirements, you could face unexpected costs or delays in getting your system online.

How to Avoid This Mistake

• Explore Net Metering Options: See if your utility has a net metering program. Make sure to understand the credit rates, limits, and how to sell solar electricity from a home solar setup.
• Factor in Connection Fees: Certain utilities might charge fees for connecting to the grid or require special equipment, which can drive up your costs.

Mistake #10: Improper Permitting

When installing solar panels, many municipalities require permits, and some will inspect your array to ensure it follows building and electrical codes. If you ignore these requirements, you might run into serious issues later.

Why It Matters

If you don’t have the right permits, you could end up with fines or even be told to take down your panels and start from scratch. Additionally, not following the regulations means your system won't qualify for insurance or potential rebates.

How to Avoid This Mistake

• Look Into Local Permits: Reach out to your city or municipality to find out what building, electrical, and fire permits you need.
• Select an Experienced Installer: Good installers will help you with permits and inspections, ensuring everything is up to local standards.
• Schedule Inspections Proactively: Set up inspections early to avoid delays when connecting your solar system to the grid.

Mistake #11: Neglecting Local Weather Factors

Climate sets the stage for how your solar system performs and holds up over time. While solar panels nowadays are built tough to handle rough weather, certain climates call for specialized gadgets or setup tricks.

Why It Matters

Solar panels are built to work best in certain temperatures and sunlight conditions. If the local climate isn’t taken into account, you might end up with a system that doesn't work as effectively as it could. For example, regions with high humidity can lead to corrosion, shortening solar panel lifespans. Likewise, regular hail can dent or crack panels, particularly if they aren't designed for extreme weather conditions.

How to Avoid This Mistake

• Analyze Weather Patterns: Go through historical weather data to see how much sunshine and precipitation your solar site gets throughout the year.
• Invest in Climate-Smart Gear: If you're in an area that experiences hail or heavy snowfall, think about getting hail-resistant solar panels or snow guards.
• Optimize for Seasonal Shifts: For homes with limited sunlight, solar trackers can help keep your panels follow the sun all year long.

Mistake #12: Not Considering the Impact on Insurance

Adding solar panels could change your homeowner’s insurance. Some companies may require you to pay more or add coverage for solar equipment, while others might not cover them at all in standard policies.

Why It Matters

Certain insurance providers might require inspections to confirm that your installation is safe and up to code before they offer coverage. If you skip this step, you could risk facing financial trouble later. Remember, without the right level of protection, you could end up paying a lot for repairs or replacements if something happens due to bad weather or accidents.

How to Avoid This Mistake

• Consult Your Insurer: Before getting started, reach out to your insurer to find out how your policy will be affected and if you need more coverage.
• Find Solar-Friendly Insurance: Seek insurers that offer discounts for renewable energy systems or focus on green solutions.
• Get Documentation From Your Installer: Keep your installation certificates and safety documents for insurance purposes.

Mistake #13: Ignoring Aesthetic Considerations

Yes, solar power is mainly chosen for its practicality and cost savings. Still, aesthetics shouldn't be overlooked. A lot of solar adopters forget to think about how their shiny new panels will blend with their home’s look and the overall neighborhood vibe. This matters even more in places where Homeowners Associations (HOAs) keep a close eye on every outdoor change.

Why It Matters

If you don’t pay attention to the aesthetics of solar panels, you could run into trouble with your HOA or local rules. This might mean you’ll need to adjust their placement or, in some cases, take them down altogether. And let’s face it, if the panels aren’t visually appealing, they might hurt your home’s curb appeal and decrease its value on the market.

How to Avoid This Mistake

• Ask Your HOA: Before going solar, reach out to your HOA and confirm that your future project meets their guidelines.
• Choose Sleek Designs: Many solar manufacturers now offer stylish, low-profile panels or all-black designs that look great almost on any roof.
• Consider Integrated Solutions: Explore solar shingles or roof tiles—they offer a functional solar panel design for home with great aesthetics.

Mistake #14: Lack of Future Planning

Solar panels are a long-term investment, often lasting 25 years or more. However, many homeowners fail to plan for their future energy needs, installing systems that don’t leave room for expansion. As energy demands grow with the addition of electric vehicles or new appliances, a lack of foresight can result in costly system upgrades or limitations.

Why It Matters

An undersized system that doesn't account for future growth could limit your ability to harness enough energy, leading to increased reliance on grid power. Plus, retrofitting a solar system to expand capacity later can be far more expensive than planning for it initially.

How to Avoid This Mistake

• Overestimate Energy Usage: If possible, slightly oversize your system or at least ensure there’s enough space for future panel additions.
• Plan for Battery Storage: Even if you don’t install batteries now, leave space and infrastructure for future additions.
• Account for EVs: With electric vehicles becoming more common, consider your potential future energy needs for home EV charging.

Mistake #15: Overlooking Backup Power Solutions

On sunny days, solar panels are fantastic at soaking up the sun and generating energy. However, when the grid goes out or cloudy weather rolls in, it’s wise to have a trusty backup system on standby to keep everything powered. Sadly, many homeowners don’t recognize the value of this and miss out on achieving energy independence.

Why It Matters

If your solar panels lack battery backup, they won’t be able to power your home during an outage when you need it most. By adding an energy storage system, you can keep essential appliances running during emergencies, on cloudy days, and at night.

How to Avoid This Mistake

• Install a Battery Bank: Hooking up batteries to your solar panels means you’ll have energy whenever you need it.
• Consider Hybrid Inverters: These devices can switch back and forth between grid power and battery power seamlessly.

And there you have itᅳyour definitive guide to steering clear of the biggest pitfalls when transitioning to solar power. Sure, there’s more to the process than what fits in one read—every solar setup comes with its own challenges. But keep in mind, staying informed and teaming up with the right experts will help you tackle any unexpected bumps in the road.

Sources:

https://www.nabcep.org/certifications/

https://www.dsireusa.org/

https://pvwatts.nrel.gov/

https://go.sunvalue.com/steps