Panasonic Solar Panels Review

Overview

Panasonic entered the solar industry in 1975 and quickly became one of the most respected names in solar panel manufacturing, known for their high-efficiency HIT (Heterojunction with Intrinsic Thin-layer) technology. However, in 2023, Panasonic announced they were exiting the solar panel market entirely, discontinuing their EverVolt line and ceasing all solar panel sales in North America.

While Panasonic panels are no longer available for new installations, their technology set a high bar for the industry — and many of their innovations have been adopted by competing manufacturers. This review covers what made Panasonic panels stand out, how their specs compared to the market, and what alternatives homeowners should consider today.

Key Points to Remember

• Panasonic solar panels had efficiency ratings ranging from 19.2% to 22.2% — among the highest available at the time.
• All EverVolt series panels carried a 25-year TripleGuard warranty covering product, performance, and labor.
• Panasonic exited the solar panel market entirely in 2023 and no longer sells panels in North America.
• Homeowners looking for comparable quality should consider REC Alpha, Q CELLS Q.PEAK DUO, or other premium monocrystalline panels.

Panasonic Panel Variety (Discontinued)

Before exiting the market, Panasonic offered the EverVolt series — a line of premium monocrystalline panels ranging from 350W to 410W. The lineup included standard blue panels (EverVolt and EverVolt H Series) and all-black aesthetic options (EverVolt K, PK, and HK Black Series).

Most EverVolt panels used Panasonic’s proprietary HIT technology — a heterojunction design combining monocrystalline and amorphous silicon layers to reduce power loss and maximize efficiency. The half-cut cell design and pyramid-textured surface further improved light capture and reduced heat-related efficiency loss. The newer PK Black Series used PERC (Passivated Emitter and Rear Contact) technology instead, which is more common among today’s premium panels.

How Did Panasonic Solar Panels Measure Up?

When Panasonic was active in the solar market, their panels were consistently ranked among the top performers across four key metrics: efficiency, temperature performance, warranty, and price.

Efficiency

Solar panel efficiency measures how effectively a panel converts sunlight into usable electricity. Panasonic panels stood out with efficiency ratings ranging from 19.2% to 22.2% — well above the industry average of 14–18% at the time. Only SunPower, with panels reaching 22.8%, consistently outperformed them. Today’s top panels from REC, Q CELLS, and others now match or approach these ratings.