Is Your Electrical Panel Ready for Solar?
Solar is an excellent investment for East Washington and North Idaho homeowners seeking to reduce the impact of rising energy costs and grid instability on their daily lives. Our high-performing solar panels offer a rapid return on investment. Still, even the most cutting-edge technology will fail to deliver without a breaker panel capable of handling an influx of solar energy. Is your electrical panel ready for solar? Find out with this essential information from PacWest Solar, East Washington and North Idaho’s trusted home solar installer.
Electrical panel requirements for solar panels
Most solar energy systems require a 200-amp breaker box with two empty slots for a double-pole 40-amp breaker to meet the National Electrical Code.
Signs your electrical panel needs an upgrade for solar
Homes over 25 years old with poorly functioning or recalled equipment, or panels sized at 100-amp service or less, require an upgrade.
What happens if I don’t upgrade my electrical panel?
Solar energy production will be limited. Your system will not pass electrical and utility grid connection requirements. Appliance damage, system failure, and fire risks increase.
Electrical panel upgrade options for solar
An upgraded breaker box, a secondary breaker box, or a supply/line-side connection for solar offer solutions for homes without sufficient capacity.
Electrical Panel Requirements for Solar Panels
Ensuring electrical panel compatibility is one of the most important steps in installing solar. Your breaker box plays a pivotal role, connecting your solar energy system to the electrical grid and your home appliances and ensuring safe, efficient power management. What size electrical panel is needed for a solar installation?
Breaker panel capacity for solar - the 120% rule
According to the National Electrical Code (NEC), the combined rating of your solar panel and main breaker must not exceed 120% of your panel’s busbar rating. That means a 200-amp service panel is required for most home solar energy systems, though a 150-amp panel may suffice for smaller homes and installations.
Breaker box space
Using the 120% rule, a 200-amp box ´ 120% = 240-amp max rating, which generally limits solar to a 40-amp breaker. This means two empty slots are needed in your service box to install a dedicated double-pole breaker for residential solar panels.
Signs Your Electrical Panel Needs an Upgrade for Solar
Residential solar installations require sufficient electrical capacity to safely manage both incoming solar energy and the electricity your home consumes.
Your East Washington or North Idaho home may not accommodate the added load if:
· Your panel is more than 25 years old
· Your breaker box is unsafe or part of a recall
· You have a 100-amp service panel (or less)
· Not enough breaker space is available for a 40-amp, double-pole breaker
· You currently experience flickering lights, tripped breakers, and overloaded circuits, indicating a panel at maximum capacity
· You plan to add a battery storage system, EV chargers, a heat pump, or other energy-intensive appliances
What Happens if I Don’t Upgrade My Electrical Panel for Solar?
If you’re considering skipping a residential electrical panel upgrade for solar, you may encounter several issues. You may fail to pass electrical and utility grid connection requirements, as well as local building and zoning permissions. You’ll have a higher risk of breaker tripping, appliance damage, system failure, and fire with old or undersized service panels. Solar power system size and energy production will be limited, and you will be unable to upgrade your system with battery storage or additional panels later.
The advantages of upgrading your breaker box far outweigh the costs, including:
· Easily adding panels to meet growing energy needs
· Incorporating battery storage for access to power during grid outages
· Regulatory compliance
· Safer, more efficient electricity distribution
· Potentially lower insurance costs
· Bringing your home up to current electrical codes
· Increased home value and appeal
Electrical Panel Upgrade Options for Solar
We offer several options for homes that need an electrical panel upgrade for solar. These include breaker box upgrades, the addition of a secondary breaker box, and supply/line-side connections for solar, which involve installing specialized equipment between the utility meter and the main breaker to avoid panel upgrades. (NOTE: These are not allowed by all utility providers.) Most electrical panel upgrades required for solar panel installation qualify for Washington State solar tax credits and incentives, allowing you to improve your home for less.
Ensure a Seamless Solar Installation
Find out if your electrical panel is ready for solar with help from the experts at PacWest Solar. Contact us at 509-929-2728 to schedule a complimentary residential solar design and installation consultation in Kootenai County (Athol, Coeur d’Alene, Dalton Gardens, Fernan Lake Village, Harrison, Hayden Lake, Huetter, and Post Falls), Spokane County (Airway Heights, Cheney, Deer Park, Liberty Lake, Medical Lake, Millwood, Spangle, and Spokane), or Pullman today.