PV Solar Power Cost per Watt: 5kW-7kW Solar Panels System Costs 2021

This is a good time to install a photovoltaic solar power system on your property. Residential rooftop PV solar panels cost per watt installed has been dropping, and newer technology is enabling a far greater efficiency – that’s more solar energy converted into electricity for home usage – for less money.

A new asphalt shingle roof outfitted with PV solar panels

Your options for buying, leasing, Purchasing Power Agreements (PPA, see below) are expanding, and many homeowners are getting solar panels installed on their rooftops for zero down.

In this guide:

  1. Cost per Watt
  2. Total System Cost
  3. Cost Factors
  4. Rooftop Installation Considerations
  5. PV Solar Panels
  6. Buying, Leasing, and PPA Options
  7. BiPV Solar Tiles
  8. Thin-Film Solar Laminates
  9. PACE Solar Finance Program
  10. Solar System Payback Period

Cost per Watt

The national average residential solar cost per watt installed is $2.96 for a typical 5kW (approximately $14,800) to 7kW (approximatley $20,720) PV solar panels system when installed by local installers, before the 26% solar investment tax credits from the federal government.

Did you know? The 26% solar tax credits have recently been extended by congress through the end of 2022. Notably, solar ITC apply to the full amount paid for the installation of a new solar panels system.

Depending on the state you live in, your quoted cost per watt can range from $2.78 to $3.22, on average, when installed by a (small) local solar panel installer, before the 26% federal tax rebate.

Note that solar investment tax credits (ITC) are being phased out, gradually, with the amount of tax credits decreasing from 26% to 22% in 2023 (the final year for solar ITC).

How Solar Pricing Has Decreased Over Time In 2008, the cost of a solar power installation was $8.82 per watt.

Average System Cost for residential PV Solar Panels installed by Local Installers:

Small Home Average Home Large Home
Home Size 1 – 2 bedrooms 3 – 4 bedrooms 5 bedrooms
System Size 5 – 7kW 7 – 8.5kW 9 – 10kW
System Cost $14,800 to $20,720 $20,800 to $25,160 $26,640 to $29,600
After Tax Credits $10,952 to $15,333 $15,350 to $18,618 $19,714 to $21,904

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Marvin vs. Milgard Windows Cost 2021: Styles, Pros & Cons

Marvin operates in the premium end of the window market, making each product to order, one at a time, customizing windows to the exact specifications of the customer.

Marvin Casement Windows

Milgard primarily focuses on the mid-range window marketplace with its vinyl windows available in four different series.

Milgard Ultra Series single hung windows with colonial grids

The company has spent much less time competing in the high-end slice of the new construction and window replacement markets. Milgard currently offers two high-end lines, the fiberglass Ultra Series and the wood-clad fiberglass Essence Series.

Milgard Windows Cost

Milgard’s bottom-of-the line Style Line series standard 48-inch x 60-inch double pane, double hung vinyl windows run between $300 and $400 per unit (not including the cost of installation), depending on the window-specific options.

Milgard single hung aluminum window will cost between $200 and $250 per unit.

Moving up in class, additional series of Milgard vinyl windows are offered in the $550 to $650 price range.

The Essence Series is Milgard’s entry into the premium window market. It is constructed with Douglas fir, pine or primed pine on the interior and fiberglass, with 15 colors, on the exterior. Quotes typically run between $40 and $50 per square foot, or between $800 and $1,000 for a standard double hung window, not including the cost of installation.


Marvin Windows Cost

Marvin’s go-to double hung wood clad window is its contemproary Ultimate G2 Windows series. Prices range from $850 to $1,250 per window installed. This window is available with IZ3 coastal/hurricane certification for hurricane prone areas.

For Marvin’s top-of-the-line Infinity Series classic double hung window in Standard, Cottage or Oriel style, you can expect to pay between $1,250 and $1,650 per window installed, depending on your location.

Marvin Infinity Ultrex fiberglass windows feature color matched and neutral dark components with bronze and ebony interior finishes. An easy tilt finish makes cleaning a breeze.

Note that window pricing can vary considerably as manufacturers often run discounts and incentives on their lines.

Did you know? Final cost can also vary depending on the design options like premium materials, locks and hardware, opening control devices, and the like.

Installation costs depend on whether replacement windows can be installed directly into the existing frames or whether new carpentry is required.

It is not unusual for a new window with options and installation to add many hundreds of dollars to the unit price.


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Top 5 Energy Efficient Home Improvements and Their Costs

Are your ready to make your home greener and more energy-efficient? If so, consider the following five home improvement upgrades that can be completed by a professional remodeling contractor, as well as by an experienced DIY enthusiast working collaboratively with a handy friend. 😉 1. Cool Roofs Vs. Traditional Asphalt and Dark EPDM Rubber Dark … Read more