Solar Power Systems
Solar power systems are sometimes priced based on the price-per-watt or price-per-panel for the complete installation.
The following guide will help you with estimating or comparing prices. You can also skip straight to our Price Sheet to see examples of our common system options and their price ranges.
Price-per-watt is based on the solar panels' power (watts) rating, including the complete system installation. Our most common rooftop solar installations are in the range of 4 kW to 8 kW at $2.20 to $2.60 per watt (or $2,200 to $2,600 per kilowatt (kW)). For example, a 6 kW rooftop solar power system installed for $15,000 is $2.50 per watt. Depending on installation requirements, actual pricing may vary plus or minus 10%.
Price-per-panel is another easy way to estimate a system price. Our typical rooftop solar installations come to $1,000 to $1,200 per solar panel (fully installed system price). Today our standard residential solar panel is rated at 400W. Therefore you will get 1 kW for every 2.5 solar panels.
The price per watt/per panel typically decreases as the system capacity/size increases. The installation cost for roof-mounted systems depends on the roofing material, slope, and height.
The additional cost of a ground-mounted solar array typically adds $4,500 to $7,500 compared to the same number of solar panels on a roof. This depends on numerous factors such as the terrain, ground type, and distance from the home, as excavations are required for posts, concrete, and trenching a power line.
Battery Power Systems
Our most popular whole-home AC battery power system - the Tesla Powerwall - starts at around $12,000 for a 5.8 kW / 13.5 kWh capacity battery, depending on the specific installation and wiring requirements. Based on the storage capacity, this works out to around $1,000 per kWh.
Bear in mind that AC battery systems have an integrated AC-DC inverter, unlike 48V DC batteries which are sold separately from the inverter and supporting hardware. DC systems and their additional components and installation time typically add 20% or more in costs. Because of these differences, price-per-kWh comparisons are not so straightforward. We offer both types of systems to accommodate specific requirements.
Federal Tax Credit
Our pricing/quotes do not include the federal investment tax credit, as this is something you get to claim when you do your taxes for the year the system is installed. The tax credit amount is 30% of the total installed price (qualifying solar electric and energy storage property costs). The credit balance also carries over until fully utilized. See IRS form 5695 to learn more.
(Please note: We do not sell or service DIY kits, RV systems, off-the-shelf systems, or mobile power systems.)