Building a Home for Solar: Maximize ROI and Optimize System Efficiency

Are you considering building a home for solar energy? To maximize your solar investment and ensure your system operates at peak efficiency, it is essential to integrate your solar system during the construction phase, not after your home is fully built.

This comprehensive guide outlines every step, from home design and rough electrical work to roofing and final panel installation. By following this guide, you will enhance your solar system’s efficiency, power output, and aesthetics, ultimately maximizing your return on investment (ROI).

Solar Integration Broken Down by the Phases of New Construction

We have organized this guide by the general phases of any new construction home. Within each section, the steps for optimal solar integration are detailed. We encourage you to follow this guide from beginning to end.

Planning and Design

Contrary to common belief, solar integration begins long before the panels are installed. Oftentimes, the preliminary steps are the most critical, and result in the best-looking and highest-performing systems. Here are the decisions regarding your solar system you need to make during the home planning and design phase:

Choosing a System That’s Optimal for Your Property

First and foremost, you must decide which kind of solar system will be installed on your property. Your options are rooftop solar, ground-mount solar, or a Tesla Solar Roof. All three systems can be great options depending on factors like your property size, roof design, proximity to trees, and budget. Some considerations for each system include:

Rooftop Solar: For Big, Simple Roofs

Best for homes with minimal tree coverage and regular sun exposure. Roof planes must be big with a simplistic design. It typically is the most cost-effective system.

Ground-Mount Solar: Ideal for Complex Roofs and Open Spaces

If you have a complex roof design or ample land space with consistent sun exposure, a ground-mount solar system could be your best option. Although they generally involve higher initial costs due to the need for a racking structure, they can provide superior energy production. This is because ground-mount systems allow for optimal angling and tilt adjustments, maximizing sunlight capture and increasing overall electricity generation.

Tesla Solar Roof: The Exceptional Choice for New Construction Homes

For homeowners embarking on new construction and seeking a cutting-edge, aesthetically pleasing solar solution, the Tesla Solar Roof stands out. Designed for those who prioritize luxury and style over budget constraints, the Tesla Solar Roof integrates solar technology seamlessly into your roof. Unlike traditional solar systems, it uses individual solar tiles that blend in with your roof’s design, eliminating the need for bulky panels. This sleek, high-performance option not only enhances the appearance of your home but also delivers efficient energy generation.

Pick Any Roof Type, As Long As It’s Jet Black

The type of roof you choose will impact your installation process and timeline. But whether you go with asphalt shingles or a metal roof, we always recommend opting for a jet black color so your panels will seamlessly blend in.

Design a Large, Simplistic, South-Facing Roof for Solar Panels

For the best performance of your rooftop solar system, design a large, simple, and south-facing roof. If you’re in the northern hemisphere, positioning your system to face south maximizes sunlight exposure. The larger and simpler the roof, the more solar panels you can install, which translates to increased energy production. Avoid complex roof designs with multiple dormers or obstacles that could interfere with panel placement. Whether you prefer a clean, symmetrical look or are open to creative solutions, planning your roof design around solar panel installation will lead to optimal results.

The ideal roof tilt angle for solar panels is equal to the latitude of your location. For example, the latitude in Massachusetts ranges from 41 degrees to 43 degrees and therefore, the optimal tilt angle for solar panels in Massachusetts is around 42 degrees. Aligning your roof’s tilt with your latitude ensures that your solar panels receive the maximum amount of sunlight throughout the year, enhancing their efficiency and performance.

Choose the Largest, Most South-Facing Area for Ground-Mounted System

When planning a ground-mounted solar system for your new construction home, selecting the ideal location on your property is high-priority. Key factors to consider include sun exposure, available land space, trenching requirements, and the proximity to your other electrical equipment.

Consider Batteries So You’ll Never Lose Power Again

If your new construction home is in an area prone to power outages, installing a battery storage system is a smart choice. We highly recommend installing a battery storage system so that you will never have to worry about losing power again. Even if you don’t face a lot of outages, batteries still offer significant advantages. They are highly beneficial in conserving the energy your solar system produces and can act as a source of energy throughout the night or on less sunny days. Additionally, many areas offer battery-specific incentive programs that provide financial benefits for years after installation.

When deciding on battery placement, consider both accessibility and aesthetics. Most battery systems are suitable for indoor or outdoor installation but must comply with National Fire Prevention Association (NFPA) codes. This may include installing your batteries in a fire-rated utility closet or protective bollards.

To maintain the appearance of your home, we recommend installing your batteries in a concealed location. Batteries are relatively large so strategic placement will guarantee they do not distract from your home’s aesthetics.

Choose a Discreet Meter Socket Location for an Aesthetically Pleasing Home

You have two options for meter socket location: mounting the meter socket on a pedestal or directly on your home.

Pedestal Mount for Elegant Design

Mounting your meter socket on a pedestal offers the best solution for concealing it, keeping your home’s exterior sleek and uncluttered. Although this option involves digging a trench to connect your home to the pedestal, many homeowners find the additional cost worthwhile. The pedestal can be strategically placed in a less visible area, avoiding clunky equipment on the side of your house and preserving valuable wall space.

Home Mount for Discreet Meter Installation

If a pedestal mount is not feasible or if you prefer your meter socket to be attached directly to your home, we always recommend mounting it to a composite board. This method prevents drilling into your siding, preserving your home’s exterior. It’s crucial to meticulously plan the layout of the electrical equipment on this board so that it can take up as little space as possible and maintain your home’s aesthetic appeal.

Upgrade to 400 AMP Electrical Service to Maximize Power Potential

Your home’s electrical service determines how many electric appliances you can use, like electric water heaters, heat pumps, stoves, and electric vehicle chargers. The more appliances you have, the higher your electrical service capacity should be.

To get the most out of your solar investment, we recommend you switch as many appliances as possible to electric. This way, your solar system can power your entire home, reducing your reliance on nonrenewable energy.

We recommend at least a 400 amp service for new construction homes with solar systems. It’s better to have more capacity than you think you need because retrofitting a service upgrade to a fully insulated and constructed home is costly and complex. We’ve never had a homeowner tell us they wished they got a smaller service, but we’ve definitely have people say they wish they sized up in the beginning.

Choose a Concealed Inverter Location

Every solar system needs an inverter. It’s crucial to decide where it will be placed during the design phase because all system conduits connect to it. We suggest installing the inverter inside, in an electrical closet or basement, to keep it out of sight. While they can be placed outside, an interior location is preferable for maintaining your home’s aesthetics.

Pre-Construction

Consider an Electric Vehicle for $0 Gas Expense

Most electrical codes require new construction homes to include conduit for an EV charger, even if you don’t own an electric vehicle yet. The standard conduit is about 1 inch thick but we recommend running at least a 2-inch conduit. Newer electric vehicles are becoming more powerful and may need up to 200 amps of power. If you only install the thinner conduit, you’ll have to tear up drywall or run new conduit outside later, which can be costly and unattractive.

Core All Conduits Through Foundation for a Sleeker Look

Once you’ve determined the locations for all your electrical equipment, pour your foundation and core it so that all conduits can run smoothly through it. This approach keeps conduits from being visible on the exterior of your house, preserving its aesthetic appeal.

Neglecting to core the conduits can affect your home’s thermal efficiency, as extra openings can let air escape. This decreases the return on your solar investment, requiring more heating or cooling to maintain a comfortable temperature. Properly coring conduits is essential for a clean and efficient solar system.

Build Ground-Mount Racking ASAP So External Conduits Can Be Run

Conduits can’t be installed until the ground-mount racking is in place. The conduits and trench must align precisely with the racking, so it’s crucial to install the racking as soon as possible to avoid delays in the installation process.

Dig Trenches and Run Conduits to External Structures or Ground-Mounts

If your solar system is going anywhere other than your roof, you’ll need a trench to connect the electricity to your home. After finalizing the exact location of the structure, dig the trench from your home’s electrical panel and inverter to the panels.

Ensure the trench is deep enough to protect the conduit and maintain a clean look. Properly running these conduits underground will help preserve your home’s aesthetics and ensure a seamless integration of your solar system. This step is essential for maintaining both the functionality and visual appeal of your dream home.

Rough Construction

Install Deck Boxes During Roof Framing to Maintain Roof Warranty

When your roof is being framed, it’s crucial to install deck boxes at this stage. This prevents the need for roof penetrations after the roof is completed, which helps maintain your roof’s warranty and provides better protection against leaks.

By planning and installing deck boxes during the framing process, you ensure a seamless integration of your solar system with your roof. This approach not only safeguards the structural integrity of your roof but also enhances the overall aesthetics and functionality of your home.

If you are getting a metal roof, especially a standing seam metal roof, avoid making any penetrations for deck box installations. Ensure that the deck box penetrations are done by the roofer to maintain your roof’s warranty.

For standing seam metal roofs, solar panels are attached using clamps, which means no holes are needed in your roof after the deck box is installed. This method preserves the integrity and warranty of your roof, while also ensuring a clean and secure installation for your solar system.

Run Interior Conduit Through Framework for “Wireless” Electricity

When constructing a new home, it’s crucial to run all electrical conduits through the framework, making them invisible from the outside. Drill holes through floors and use protective sleeves before installing the conduit. This should be done before drywall installation to achieve a “wireless” look for your solar system. Failing to do so may require drilling through drywall later on or running visible conduit, which can distract from your home’s appearance.

Install a Main Breaker with Your Electrical Panel For Smoother System Installation

While electrical code may only require a main breaker on your electric meter, solar systems also need a main breaker on your electrical panel. Install this during the initial setup with the rest of the electrical equipment to ensure a sleek installation. Retrofitting later can compromise the appearance and delay the rest of the installation process.

Break Your 400 AMP Service Into Two 200 AMP Services For Efficiency and Simplicity

For new construction homes, we recommend at least a 400 amp service to maximize your solar system’s power potential and support numerous electrical appliances. However, splitting this into two 200 amp panels is more efficient. It simplifies installation, maintenance, and future upgrades by allowing you to separate circuits for different areas of the house. Additionally, two 200 amp panels are typically more common and cost-effective than a single 400 amp panel.

Hardwire Your Solar System for a Reliable and Secure Internet Connection

It’s important to maintain a steady internet connection so that your system’s performance can be monitored and tracked at all times. There are a few ways to connect your inverter to the internet: Wi-Fi, a cellular card, or an Ethernet hardwire.

Wi-Fi

While convenient, if your Wi-Fi password changes or if your router goes offline, you’ll need to manually reconnect your system. This can be difficult to remember and result in a loss of data.

Cell Card

Cell cards are a more stable option but as technology advances, you will need to upgrade the card to keep up with new cellular generations like 4G and 5G. Typically, cell cards will last five years.

Ethernet Hardwire

We always recommend hardwiring your inverter to your router through an Ethernet cable during rough construction of your home. Hardwiring provides a stable and reliable, long-term connection, ensuring your system stays online without interruptions.

Make Sure All Tradespeople Strategically Mount All Roof Pipes and Vents to Prevent Breaks in Panels

For roof-mounted systems, ideally, there should be no pipes or vents on roof planes where solar panels will be installed. If unavoidable, ensure all pipes and vents are mounted within 18 inches of the ridge and rakes. This prevents them from disrupting the panel layout.

Exterior and Interior Finishing

After your drywall is up, it’s time to mount your electrical equipment. Depending on your plan, this equipment may be installed outside or inside. At this stage, you can also complete your roof installation.

Tighten Up Exterior Mounts as Much as Possible to Minimize Visual Impact

Ensure all exterior equipment, such as meters, inverters, and disconnects, are mounted as tightly as possible within a composite board to minimize visual impact. This helps keep your home’s exterior clean and aesthetically pleasing.

Install Fire-Rated Utility Closets for Safe Interior Battery Mounting

If you’re mounting batteries inside your home, you may need to install a fire-rated utility closet or battery enclosure room to meet fire codes. The number of batteries and the battery model will determine the minimum size of the room. Work with an experienced contractor to ensure the room complies with code.

Finishing Touches

Believe it or not, the finishing touches of your solar system involve laying the actual solar panels. This is the final step aside from pairing your system to your inverter. Once your panels are installed and your system is paired, you’ll be able to monitor your solar production and household electrical consumption. In the following weeks, final inspections will take place and you’ll be ready to turn on your solar system and start generating your own electricity.

From Planning to Power: Isaksen Solar Can Guide the Way

There are so many details to remember when planning and building a new construction home for solar. Isaksen Solar is here to guide you through the entire process, ensuring you have the most aesthetically pleasing, high-functioning, and efficient solar system possible. With years of experience in new construction jobs, we understand the ins and outs of these installations. If you have any questions or would like to set up a consultation with one of our expert Project Managers, give us as call at (508) 717-3820.