Investing in residential solar panels can be an excellent way to reduce your overall "carbon footprint" while also saving money on your home's energy bills. Installing a solar system can also allow you to upgrade your electrical appliances and then use them freely without worrying about added utility costs!

To choose the best residential solar energy panels on the market, you need to consider the efficiency of those panels, as well as their price, warranty, and the reputation of the manufacturer. Other factors to consider might be the temperature coefficient of the panels and whether a company offers various options for solar equipment rather than just roof panels alone.

Choosing the best residential solar systems residential solar systems is not as difficult as you might assume if you understand a few basics of the efficiency and ratings systems of these panels. It's also good to consider how to conserve energy in your home beyond the use of solar energy itself. This information will ensure you're making all the right decisions when it comes to energy savings and conservation.

What Are the Most Efficient Solar Panels?

efficient solar panels

To choose the most efficient residential solar energy equipment for your home, first, consider what is meant by solar efficiency. Simply put, the efficiency of solar panels refers to how well the system converts sunlight into usable energy for your home. A solar system with a low-efficiency rating will not trap and then convert as much sunlight into usable electrical energy as a system with a higher-efficiency rating.

It's vital that homeowners understand solar efficiency ratings, as systems with higher ratings are often more expensive. However, higher-rated systems also provide more electricity for the home so that you pay less for city-supplied power throughout the year or get a more substantial credit on your electric bill. Efficiency ratings for solar panels are measured as percentages, and some of the best panels on the market today have efficiency ratings of around 20% to 22%, so consider investing in these types of panels when you're ready to purchase a solar system.

What Is the Temperature Coefficient of Residential Solar?

The term temperature coefficient refers to how well the solar system will perform in poor weather conditions. It might seem a bit confusing, but solar systems operate better in a cooler environment and will become less efficient when exposed to hot weather and lots of unabated sunlight. The temperature coefficient measures how much efficiency is lost by the panels during inclement weather.

The temperature coefficient is expressed by negative percentages, indicating the amount of efficiency lost when the panel is exposed to extremes in temperature. A high-quality panel might have a temperature coefficient of -0.3%, as an example. This temperature coefficient number becomes very important for panels exposed to harsh sunlight, such as for properties in the tropics or those without any shade trees.

What Is a Good Warranty for Solar Systems?

warranty for solar systems

Before you assume that the most extended warranty available is the best choice for residential solar systems, note a few considerations to keep in mind about the length of the warranty you would need for solar panels.

How to Choose the Best Residential Solar Panels

Now that you know a little bit more about how solar panels are assessed and rated, you might note a bit of added information that can help you choose the best solar panels for your home.

Considering All Your Options for Solar

considering options for solar

Solar roof panels are probably the most popular choice for homes, but they're not your only option. Note a few additional options you might want to discuss with an installer or manufacturer when you're deciding on residential solar power for your home.

How to Go Green at Home

residential solar panels

Solar panels are an excellent choice for conserving energy and reducing the amount of pollution for which you're responsible, as said, but they're not the only option for reducing your carbon footprint at home! Note a few other tips that homeowners often overlook for reducing the amount of power they use at home and for reducing their environmental impact.

If you utilize these tips along with residential solar panels, you will reduce your energy consumption and save both money and the environment! Contact Greenville Solar Solutions to learn more!

Buying solar panels is a big step for many consumers and a confusing one as well! One question asked by many homeowners who want to have solar panels installed on their homes is if they should buy or lease those panels and how their choice will affect their cost savings over the years.

Buying solar panels versus leasing is more expensive at the outset, but purchasing your panels can mean greater convenience and flexibility as well as more cost savings over time.

To ensure you're happy with your solar panel buy vs. lease decision, check out these reasons why we've determined at Greenville Solar Solutions that buying the solar panels is often preferred by many homeowners.

1. Mobility

buy solar panels


You may not be thinking of putting your home on the market today, but if you do purchase your solar panels and then eventually sell your home, you can often take your solar panels with you and have them installed in your new residence. Leases for solar panels may not be transferable, and you may even wind up paying a financial penalty if you want to terminate that lease early just because you're moving!

In some areas, having solar panels installed on a home may make that home more desirable to potential buyers, but this isn't always the case. If you don't want to take your solar panels with you to a new residence but find that homebuyers don't like the option of installed panels, you can have panels that you own removed and then resell them to recoup your cost. Again, this is without the risk of penalties for early lease termination and other such expenses.

2. Cost Control

When you sign a ten-year or twenty-year lease, it's easy to overlook the potential for the costs or terms of that lease to increase, as the end of that lease is a long way off. However, those years will eventually be over, and you will then need to sign an entirely new lease agreement, which might be well above the cost of your current lease!

When you purchase solar panels, you don't need to worry about any cost increase or adjustment to the terms of a lease. Once you've made your purchase or have paid off the amount you put on a credit card or that you took out as a loan to buy those solar panels, you then only need to worry about any minor maintenance costs you might face down the road.

3. Installation Choices

When you lease solar panels, you may have limited options as to the installers you can use. The leasing company may dictate these choices to protect the condition of their panels or for their financial incentives.

However, when you purchase solar panels, you are typically free to use an installer of your choosing. You might then save money on the cost of installing those panels and can also choose a company with a stellar reputation, which offers a better guarantee for their work, that can install those panels more quickly than other companies, and so on. In some cases, those installers might also offer packages for cleaning and maintenance of the panels so that you save even more money on lifetime ownership of those new panels.

4. Greater Return on Investment

warranty for solar systems

It typically costs thousands of dollars to buy or lease solar panels. In turn, it often takes a few years to see a return on your investment in terms of money saved on your electric bill.

When you lease solar panels, you might assume you're getting an immediate return on that investment, as the money saved on your electric bill might be more than the money paid for the lease. However, consider that you'll be spending on that lease for as long as you own your solar panels. If you buy solar panels, your savings will eventually match and then exceed your purchase price. Over time, you'll see even more money in your pocket from purchasing panels than from leasing.

This return on investment is even higher if you pay cash for your solar panels versus securing a loan. If you can forego paying interest on your loan for solar panels, that means even more of your savings going directly into your pocket!

5. Better incentives

Many states have incentives for installing solar panels, including rebates and tax deductions. These incentives are often better for buying solar panels and may include a deduction for the interest paid on secured loans.

6. No penalties for removing the panels

If you want to stop using solar panels for whatever reason, you might need to pay the penalty for early termination of a lease. When you own your solar panels, you can have them removed and then resell them as desired without financial penalties. This option is useful for those who might retire before a standard lease term is completed if you haven't decided yet if you'll stay in your home or move to a senior apartment!

Purchasing can also be a good choice if you live in an area with temperamental weather conditions and you're not sure if the solar panels will collect and store enough electricity to offer a significant return on your investment. You can use the panels for several years and note your overall savings, and then decide if you want to keep them or if prefer to resell them and recoup some of your costs.

7. Easier to upgrade

Because solar panels can be a bit costly to install, many homeowners initially opt for a low-power type of panel that collects and stores only so much energy simply because these panels are less expensive. However, a homeowner may then realize that they enjoy having solar panels on their home and want to upgrade to more powerful models that are able to collect and convert even more energy, along with larger batteries or storage packs to hold that stored power.

Upgrading to better panels is often tricky when you lease, as you may be committed to a particular type of panel for the lifetime of your lease and may face penalties or costs if you want to change those panels. When you buy solar panels, you are free to upgrade or swap out the panels for something different at any time without facing those charges and added costs written into a lease agreement.

8. Adding apps

There are apps you can buy and connect to your solar panels, which then work with your Android, iPhone, MAC, tablet, or other devices. These apps do all the math and figuring needed to find out how much money you're saving with your solar panels.

Some lease packages do include apps that connect to phones or computers, but note that your choices for these apps may be limited if you have any choices at all! Purchasing your panels allows you to choose any app or program that is compatible with your device and with the panels themselves, making it faster and easier to track your energy usage and finances connected to the panels.

9. No worries about the lease company

efficient solar panels

One upside to leasing solar panels is that the lease agreement often comes with a service agreement so that the company leasing the panels will perform needed maintenance on those panels. However, solar panels rarely require any maintenance and care other than a simple brushing of their surfaces on a regular basis, so this may not be much of an incentive to lease.

Also, it's good to consider that this may not be an incentive if the leasing company goes out of business! You might choose a lease so that you don't need to worry about the maintenance of your solar panels, only to find that a particular leasing or finance company is no longer in business after a few years, and you are no longer eligible for that free maintenance.

When you purchase solar panels, you won't be paying for a maintenance option that you don't need and that might not be honored some years down the road. This incentive also makes a purchase more financially sound than a lease agreement.

10. Permanent ownership

Permanent ownership of solar panels is one of the best reasons to buy rather than lease. Consider that many people lease cars so that they can turn in their vehicle after a few years when it's suffered some wear and tear and starts to look a bit dingy. A consumer can then opt for a new car model that is a better fit for their needs, and which requires less maintenance because of its age.

However, solar panels don't typically wear out over the years. As they get older, these panels rarely need replacement parts or new wiring. Solar panels have no moving parts that suffer corrosion and other damage from long-term use, and their glass fronts rarely chip, crack, or break even when exposed to very inclement weather. Solar panels can then collect and convert solar energy no matter their age, and you can enjoy these eco-friendly cost savings for many years if not decades, to come!

Adding solar panels to your home or business can be a great way to reduce your overall utility bills and reduce your carbon footprint as well! While electricity itself doesn’t produce harmful fumes and emissions, electrical power plants often use fossil fuels to operate, so the less electricity you use, the less pollution that’s created overall.

Before you do get solar panels for your home or office, however, note some very important questions to ask a manufacturer or an installer, which you might also need to ask yourself. This will ensure you choose the right panels, that you know how to use them properly, and that you know how to keep those panels maintained and in good repair through the years.

Which solar panels will provide enough electricity for a home or office?

Questions to Ask Before Getting Solar Panels

Solar panels come in a variety of sizes, strengths, and nearly infinite solar design options. Each variety will collect and store a certain amount of power. Don’t assume that one or two panels are all that’s needed for your home or business to be fully powered, even if you don’t think you use much electricity every day. Depending on the amount of electricity consumed by your house or commercial building, you may need to invest in more than one solar panel or may need to upgrade to a high-quality variety that collects more power overall.

Note, too, that you might also consider how to make your space more energy-efficient when you get solar panels, so you will always have the power you need from those panels. For example, energy-efficient kitchen appliances, a tankless or on-demand hot water heater, and LED light bulbs can all reduce your power consumption at home and in a commercial facility.

Be sure to consider this before you buy your solar panels; if you’re taking out a home improvement loan or a business loan for those panels, consider making these changes inside your house or commercial facility at the same time. You can then increase that loan amount to cover the cost of making your home or office interior more energy-efficient overall.

Will your roof or property need some clearance for the panels?

While solar panels can collect sunshine even when they’re not in bright, direct sunlight, they won’t collect and convert as much energy when they’re obstructed by overhead tree branches, outdoor signage, a satellite dish, or anything else that may hover over them and create shade.

It’s vital to ask an installer about the clearance your property might need for the panels, as you may need to trim the trees on your property or ask a neighbor to trim theirs so your panels are in full sunlight. If those panels would be obstructed by something that cannot be removed, such as outdoor signage or tall buildings, you might need to invest in larger panels that will draw as much sunlight as possible or invest in a stand-alone panel that is mounted on the ground, along with roof panels, so that your home or commercial facility gets the solar energy it needs.

Will your local climate support the panels?

Solar panels can absorb sunlight even on a cloudy or rainy day, but the more direct sunlight they’re exposed to, the more energy they will absorb and store. If the climate in your area is very cloudy with little sunlight throughout the year, you might consider installing a solar panel that is just attached to the hot water heater or HVAC system. The panel you choose may only gather enough solar power for one such appliance, but you would still be saving some money on your overall energy costs by having that one appliance powered by solar.

Ask what the warranties cover specifically

getting solar power rebates

A long and detailed warranty can mean that you’re buying a high-quality solar panel and that the manufacturer is willing to stand behind his or her product. However, you also want to ensure you know what that warranty covers!

Ask if the warranty on your solar panels covers the wiring, the converter, and the batteries that are part of the solar panel system. It’s also good to ask if the warranty covers shipping and labor for any part that needs replacing while it’s under warranty or if the warranty covers just the cost of the part itself.

It’s also very important to ask if any warranty covers potential damage to your roof from the panels or the installation process. Rarely will a solar panel or its components cause roof damage, but in case a panel does get broken or the wiring becomes bare and frayed and singes the roof, it’s good to know if such damage is covered.

If your home’s roof or the roof of a commercial building is not covered under the solar panel warranty, you may want to check with your homeowner’s insurance carrier or property insurance carrier. Note if any damage from a solar panel would be covered under that insurance policy instead or if you should add a rider to the policy, you would be reimbursed in the rare case of roof damage caused by solar panels.

Is there a performance guarantee?

A warranty covers physical parts, whereas a guarantee covers service or performance. It’s good to ask if your solar panels will have a performance guarantee; this guarantee would refer to the amount of power they will actually collect, convert, and store for you, given your typical weather conditions.

If your solar panels do have a performance guarantee, you also want to ensure you know everything required of you to honor that guarantee. For example, the guarantee may not be valid if you allow tree branches to grow across the front of the panels or if you don’t regularly brush leaves and other debris off the front of the panels.

What happens if the panels are destroyed or stolen?

A warranty for the parts of a solar panel may not cover the cost of replacement if the panels are destroyed or stolen. It’s good to ask about this, to know if the manufacturer or installer offers a replacement option or an insurance plan that would specifically cover the destruction or theft of these panels.

As with damage to your property’s roof, you may want to ask your homeowner’s or property insurance carrier if their policy would also cover the destruction or theft of the panels or if they offer an additional rider for these costs. You can compare their prices with any additional insurance offered by a solar panel manufacturer or installer and note which would be the best option for you.

Consider what a lease would include versus the option to buy

purchasing solar panels for home

If you can’t afford to purchase the solar panels you need, you might be able to lease them or lease to own. As with leasing a car, you would need to consider the long-term cost of the lease, including any interest payments, versus the cost of buying these panels.

When comparing these options, be sure you factor in the amount of savings you expect when it comes to your energy bills and any “perks” in the lease. For example, a lease might include an extended warranty package, a routine check of the panels, and so on. Having these items included in the lease might then make it a more cost-effective option versus buying.

Ask if leased panels can be transferred

Are you thinking you might sell your property in the near future? If you buy solar panels, you should be able to take them with you to your new home or office. If you lease them, however, be sure to note if you would be allowed to transfer those panels to a new structure under that same lease.

If you can’t transfer the panels under the same lease, is there a fee for breaking the lease early? If so, you need to consider this fee in the overall cost of a lease. In some cases, purchasing the panels may then be the better, more cost-effective option overall.

Ask if a lien is put on your property for a lease option!

When you lease solar panels, the installer may have the right to put a lien on your property so that you cannot sell your home or commercial property without first terminating your agreement with the solar company. This lien itself can make it difficult to sell your property, as the new buyers may be obligated for that lien amount when they buy your property.

Whatever the case, always ask about this potential lien before you decide to lease solar panels, so you know your obligations and any rights the solar company has to your property itself if you should decide to lease the panels.

Ask about the process and cost of temporarily removing the solar panels

All roofs need regular maintenance and eventual replacement, and your new solar panels may need to be removed and then reinstalled if your structure’s roof needs any type of work done in the near future. This is why it’s good to ask about this process and cost.

In some cases, the cost of temporarily removing solar panels itself is very minimal, as the wiring for the panels may not need to be removed and then reinstalled. In other cases, such as when the roof needs outright replacing, temporarily removing and then reinstalling the panels might be a bit costly and cumbersome. Whatever the case, always ask about this, especially if your structure’s roof is a bit older and may need some repairs in the near future.

Ask how they figure inflation when figuring your cost savings

Very often, a solar panel salesperson will provide charts or some type of figure that gives you an idea of your overall cost savings if you were to choose their solar panels. If so, ask how they figure inflation and check these numbers against the standard inflation in your area.

If they are using an inflation rate that is much higher than average for your area, you may want to do your own math and adjust that rate accordingly. This will ensure you get a more accurate picture of the overall savings you might expect every year.

How do you clean these solar panels in particular?

Typically, solar panels only need an occasional sweep with a standard, soft-bristled household broom, to remove leaves, twigs, seeds, and other debris that may have settled on their surface. Running a garden hose over them will also typically remove caked-on dirt, mud, bird droppings, and the like.

clean and install solar panels

However, you want to be sure you know how to properly care for your solar panels in particular, especially if you live in an area prone to strong storms that might leave behind watermarks, mud, silt, or sand from a nearby beach. If you live in a tropical area, you might also notice salt stains from seawater, or a structure located near production facilities may suffer oil stains and greasy residue on its solar panels.

Don’t assume you should clean solar panels with standard household glass cleaners, scrubby pads or brushes, degreasers, or anything else that you might use on regular windows or other glass surfaces. While solar panels are very durable, the wrong tools or chemicals can scratch them or cause the glass surface to become cloudy, so always ask about how to keep them clean and how to tackle debris that doesn’t brush or rinse away easily.

Ask about maintaining the batteries

If you’ve ever wondered how solar panels can provide a home or business with power at night or on a cloudy day, the answer is batteries! The power collected by solar panels is converted into the power used by your home or business and then stored in batteries that are connected to a structure’s electrical lines.

As with any other type of battery, solar batteries may need a cool and dry place for storage, away from bitter cold and extreme heat. You may not need to do much to maintain these batteries every day other than wipe down the connections or anodes on occasion.

Ask your manufacturer or installer about any such needed maintenance so you know those batteries don’t lose power due to improper storage. This will also ensure the wiring and other accessories of the batteries are always in good repair.

Ask about incentives!

Many local governments offer tax incentives for installing solar panels on your home or commercial facility; this might be a deduction you can take from your tax return, or a rebate you get from your state or city government to cover some cost of solar panels. You can usually ask the manufacturer or installer about these incentives, so you don’t overlook any monies you might receive for having them installed.

How will you know when your panels need maintenance or repairs?

A solar panel may need maintenance if the wires come loose from the panel, if there is corrosion on those wires, or if the glass of the panels becomes cloudy or otherwise damaged. However, this type of damage may not be easily visible, especially to someone who has never had solar panels installed on their home or commercial facility before.

solar panel maintenance and repair

Rather than assuming you’ll be able to easily see damage to your new solar panels, ask your manufacturer or installer what to look for that might indicate your panels need repair. This can include a sudden spike in your city-supplied electric bill, visible corrosion along the batteries or converter attached to the panels, or discoloration on the surface of the panels. Knowing what to look for before any of this damage occurs can ensure that you address these problems quickly and that you keep those panels in good repair.

Bonus question: Can you disconnect from the grid?

One last question or issue to note before you have solar panels installed is if you’re legally allowed to completely disconnect from your city-supplied power. In some areas, you’re allowed to install all the solar panels you want on your home or commercial building, but must still be connected to city-supplied power in some way, rather than going completely “off the grid.”

If you are thinking of disconnecting your home or business from the city’s electrical grid, ask your installer if this is allowed in your area, as he or she might be familiar with local laws and regulations. If they’re not sure of these legalities, ask your city or county clerk; typically, the department that issues building permits would be familiar with such restrictions.

You might also consult with a local real estate agent about what is allowed in your area, as they are usually knowledgeable about any laws that are applicable to a home’s or commercial facility’s utilities. Even if you need to pay an agent a small fee to consult with them about this issue, it can be worth it to ensure your home or business is compliant with local regulations. This will help you avoid fines, penalties, or costs for reconnecting your structure’s electrical wiring to the city-supplied power after your solar panels are installed. If you're in the Greenville, SC, region, give us a call at Greenville Solar Solutions to have your questions answered.

While solar panels are a relatively low-maintenance investment for your home, you do want to ensure you’re cleaning and maintaining them properly over the years.  Here are our best practices on how to clean solar panels for your home in safe and sustainable ways.

Avoid using detergents, alcohol, abrasive powders, and rough, hard-bristled brushes on your home’s solar panels, as these can easily damage the glass and the solar components themselves.

High-quality solar panels are very durable and meant to withstand storms, falling branches, high winds, hail, and other hazards, but these panels are not indestructible! The wrong cleaning tools and improper cleaning methods can scratch these panels or make the glass cloudy and streaky. Improper cleaning methods can also damage their wiring and the connectors that hold the panels to the home’s roof or siding.

To better understand how to clean and maintain solar panels properly, first note some basic information about how these panels work, along with some tips for how to get the most use out of them and how to ensure they’re always in good repair.

How do Solar Panels Work?

In very simple terms, solar panels allow particles of light, called photons, to “knock” electrons free from atoms, which then creates electricity. Metal plates in the panels capture this electricity and allow it to run along wiring and then through an inverter. This inverter converts the electricity created by the panels into the type of electricity that is used by your home.

local solar installers in greenville south carolina

This basic explanation might explain why you need to ensure the glass of the solar panels is not cloudy, scratched, or obscured. The more light the panels can absorb, the more electricity they will produce, whereas any obstruction or cloudiness will keep the panels from absorbing sunlight and functioning properly.

How to Clean Solar Panels

First, note a few things to avoid so that you don’t damage solar panels during the cleaning process:

Now that you know what to avoid when cleaning solar panels, consider what you can do to keep those panels clean and streak-free.

A leaf blower can be sufficient for removing leaves, twigs, and other debris that may have settled onto the panels. This can also allow you to clear the panels while staying safe on the ground!

Household string mops and cloths used for buffing cars can be soft enough for cleaning solar panels, but for professional-quality cleaning, invest in a squeegee meant for solar panels in particular. These will have a soft, nonabrasive cloth on one side and a rubber lip or edge on the other.

Start the cleaning by using the rubber side of this brush to gently remove any debris missed with the leaf blower. Next, give the panels a rinse with your garden hose, using a soft spray to soak their surface. This will soften any caked-on dirt, mud, bird droppings, and the like.

Using the cloth side of the cleaning brush, gently wipe down the panel without applying too much pressure. You might need to repeat this process, getting the panel wet and then wiping it down again, to remove thicker dirt and grime.

clean solar panels

If rinsing and wiping the panels with this soft cloth doesn’t remove all the dirt, add some biodegradable soap to the water. Be sure you rinse the panels thoroughly so that you remove all traces of this soap after cleaning.

Use the rubber side of the squeegee to remove all traces of water and soap from the panels after you’ve rinsed them off. Wipe the squeegee with a thick, absorbent cloth between each use so that you remove all water and debris from the rubber.

If you live near an airport, you might notice oily stains on the panels, as plane engines will often drip oil and other fluids. Use a bit of rubbing alcohol on these stains, and then wipe the area down with plenty of water so that the alcohol doesn’t dry on the panel’s surface.

Simple Tips for Easy Cleaning of Solar Panels

While cleaning your home’s solar panels is typically a very quick and easy job, note a few simple tips that might make this job even easier and more economical!

Can you Clean Solar Panels with a Pressure Washer?

A pressure washer can allow you to clean solar panels without having to climb onto the home’s roof to reach them. However, you want to use a pressure washer only for this added reach while keeping the spray of water gentle and without actual impact. Don’t use pressure to clean dirt and grime that has dried on the front of the panels, as too strong of a water spray might break or scratch the glass.

If you cannot remove caked-on dirt with a gentle spray of water, along with a squeegee or soft cloth and biodegradable soap, call a solar panel cleaning company to tackle this job for you. This will ensure the panels are cleaned properly and without damage.

How to Get the Most Use Out of Solar Panels

While high-quality solar panels will typically collect and store all the power needed for your home, you might note some tips on how to get the most use out of those panels. This will ensure they last for years before they need repair and also ensure you use as little city-supplied power as possible.

Do Solar Panels Work at Night?

When people ask if solar panels work at night, what they’re usually asking is if their home will have electricity at night if they have solar panels installed! As said, solar panels are connected to batteries, which store the power collected by those panels. These batteries are then connected to your home’s electrical systems.

solar panel company greenville sc

The stored electricity in those batteries is what allows your home to be fully powered at night, on cloudy days, during wintertime when there is less sunlight, and so on. However, note that the batteries connected to solar panels only hold so much power, which is why many homes that use solar panels are still connected to their city-supplied power. If you use up the power in those batteries before the solar panels can capture sunlight and recharge them again, your home’s electrical systems will then switch over to that city-supplied power as needed.

DIY Solar Panel Installation

One thing to consider about solar panels is that their installation is not typically a DIY job. The panels need to be positioned so that they get as much sunlight as possible, as said, and connected properly to the roof so that they withstand storms.

Solar panels also need to be properly wired to their converters and then to the batteries, which need to be connected to the home’s circuit box. Unless you have years of experience in working with electrical systems and wiring and know that you would be safe working on your home’s roof, it’s best to simply invest in the services of a professional installer for your solar panels.

Solar Panel Lease VS. Buy

In some cases, you might be able to lease solar panels versus buying them. How can you decide which is the better option?

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