So, you plan to build a solar panel system. As an intelligent customer, you do your due diligence, study trustworthy solar contractors in your region, and get estimates from several businesses.

All of your offers could be in the same area, or they may have completely different zip codes. Then you’ll be left scratching your head over why the installation prices are so disparate in the first place.

Substantial price differences during a bidding situation may raise your attention. Although they are distinct businesses that approach your project differently, you would think they would be very comparable. If they aren’t, you must find out why.

When you compare solar proposals, here’s a few things that may show you why one installation is much more or less costly than an installer.

The design of the system

Whether you meet personally, over the telephone or online, you should discuss your electricity requirements and financial objectives in your solar system with a solar adviser from each business.

During the discussion, you will speak about how much power you consume (as your electric bill tells you), how much you would want to cover with solar and any other preferences, including the types of panels, inverters if you want energy storage and where the panels are to be placed.

They will take this information and collaborate with their team to design a solar system that will meet your solar energy objectives while also being compatible with your property’s architecture.

As every installation firm has a distinct approach to your objectives and the design of your installation, each system may be somewhat different, which means that the prices vary. Variations in panel size (72 cells vs 60 cells), the number of installed panels and inverters, and system location may affect the system costs.

Size and production of the system

It is essential to check the size and productivity of the systems offered to compare apples to apples. These figures frequently vary across plans, and both may have a significant pricing effect.

Two variables affecting size and production are the system configuration and the panel type. One installation may attempt to press a panel or two into an area that another installer may not think is suitable for panels. The installers may also use various size panels with varied rates of production efficiency. 

Shading may also have a major effect on system output. Not every installation calculates the shade of the same, and this may be the primary reason behind the differences in the kWh output of two identical systems.

Another aspect to take into account is the kind of inverter utilised. String inverters convert power to panel groups that may lead to a loss of output if shading takes place on any panels in the group. With each panel, microinverters are placed. This limits any problems of shading to the shaded solar panel and not to the whole panel group.

The main issue is that you must examine these discrepancies and ask the installer about their estimates to understand why.

Equipment quality installed

The kind of equipment with which your system is built is another element in the price of solar installations. Many brands exist at many different prices, ranging from the inverter to battery to solar panels. While it may seem possible to maintain cheap installation costs with the budget brand, this may cost you more in the longer term due to equipment replacements and lost productivity.

When it comes to solar energy, you wanted to be sure that you are purchasing long-lasting, energy-efficient, high-quality panels that are supported by substantial manufacturer warranties. These assurances not only offer you tranquillity, but they are also a gauge of panel quality.

Some of these companies guarantee up to 25 and even 30 years of their panels. On the other side, budget brands may have significantly shorter guarantees. If your panels go bad a decade or two on the way, you won’t be able to have them replaced under warranty.

Depending on the size and design of your system, the inverter or inverter is another critical component of the solar system. This is the component that is most likely to fail in your solar system. 

Because of this, it is essential to go above price with quality. While a cheap brand inverter may be simpler at a later date, the money you save will probably not make up for installing substitutions more frequently than you would if you were using a branded model.