New Construction Solar

Building a new home offers a unique chance to design energy systems that save money and reduce environmental impact. Planning solar panels and battery storage early in the construction process ensures these systems fit seamlessly and work efficiently. Waiting until after the home is built often leads to higher costs and complicated retrofits. This guide walks through the key steps to coordinate your solar and battery setup during new-home construction, helping you avoid common pitfalls and get the most from your investment.

New Black Hills home with Tesla Powerwall installation

Share Your Plans Early

One of the most important steps is to share your roof and site plans with your solar provider as soon as possible. Early access to these details allows the installer to:

• Accurately size the solar system based on roof area and sun exposure

• Recommend the best panel placement to maximize energy production

• Identify any shading issues from nearby trees or structures

• Suggest wiring routes and conduit placements to simplify installation

  
  

Providing detailed architectural drawings or digital models helps the solar team design a system that fits your home’s unique layout. This early collaboration reduces surprises and costly changes later.

Coordinate at Rough-In

The rough-in phase of construction is the ideal time for your contractor and solar installer to work together. This coordination ensures electrical and mechanical components are ready for the solar and battery systems. Key actions include:

• Planning the location and capacity of the main service panel to handle solar input and battery backup

• Installing conduits for solar wiring and battery connections before walls and ceilings are closed

• Reserving space near the service panel for battery storage in a conditioned area

• Discussing any future expansion plans, such as adding a generator or increasing battery capacity

  
  

This joint effort prevents the need to open walls or ceilings later, saving time and money.

Quick Planning Tips

Electrical

• Install solar conduits during rough-in to avoid drilling through finished surfaces later.

• Decide early if you want whole-home backup or just critical circuits powered by the battery.

• Larger homes may require a 400-amp service panel to support higher loads and future upgrades.

  
  

Battery

• Place batteries in a conditioned space close to the service panel to minimize voltage drop and wiring costs.

• If the battery is in a garage, install conduits during rough-in to protect wiring and meet code requirements.

  
  

Generator

• Generators can provide backup power to batteries during extended outages.

• Install a transfer switch if you plan to integrate a generator with your solar and battery system.

  
  

Utility

• Your utility provider’s policies may affect system design, including net metering rules and interconnection requirements.

• If you plan to go off-grid, research local regulations and design your system accordingly.

  
  

Roof

• Simple, south-facing roofs without obstructions provide the best solar performance.

• Avoid placing vents or pipes on the solar side to maximize panel area.

• Roof pitches between 5:12 and 9:12 are ideal for solar panels.

• Use durable roofing materials that can support panel mounts and last for decades.

  
  

Ground Mount

• Use ground-mounted solar arrays if your roof is shaded or unsuitable.

• Ground mounts require fencing or elevation to protect panels from damage and debris.

  
  

Build for Efficiency

Integrating solar and battery systems works best when your home is energy efficient. Lower energy use means smaller, less expensive solar and battery systems. Focus on these areas during construction:

Envelope and Insulation

• Use high-quality insulation and seal all air leaks to maintain consistent indoor temperatures.

• Airtight construction is especially important in colder climates and for homes relying on solar power.

  
  

Heating and Cooling

• Heat pumps offer efficient heating and cooling with lower electricity use.

• Wire electric heating systems to a separate panel if they won’t be backed up by batteries to avoid overloading.

  
  

Ventilation

• Install an Energy Recovery Ventilator (ERV) to maintain fresh air and control humidity in airtight homes.

  
  

Appliances

• Choose energy-efficient appliances to reduce overall electricity demand.

• Ultra-efficient models are optional but can further lower energy bills.

  
  

Solar and battery systems perform best when paired with a home designed to minimize energy waste.