SunPower Solar Panels- Independent Review

SunPower solar panel review

Overview of SunPower – Company History

SunPower was co-founded in April 1985 by Dr Richard Swanson a Professor of Electrical Engineering at Stanford. The concept to utilise solar power was initially sparked for Dr Swanson through his thinking on how to deal with the oil crisis back in the 1970s. Through the 1990s SunPower was in the midst of innovative solar technology solutions, exploring the application of solar power in airplanes and cars. With a SunPower solar panel powered car winning a race across Australia in 1993. SunPower has also been involved in a number of projects with NASA over the past 25 years. Currently, in 2020, SunPower is an industry-leading residential and commercial solar panel manufacturer headquartered in San Jose, California.

Key Panel Indicators

SunPower Solar Panels

Bloomberg Tier 1 Ranking


DNV GL Top Performer


Office location in Australia


What is a Bloomberg Tier 1 Solar Panel?

Bloomberg’s infamous tier 1 ranking is NOT a measure of Solar Panel quality in any way. It is simply an indication of the bankability of the manufacturer based on publicly released information on the financial health the company. This should give you an idea if the company is a large, well-known manufacturer.

See full list of Bloomberg Tier 1 Solar Panels

What is PV Evolution Labs Top Performer?

PV Evolution Labs with support from DNV GL independently test solar panel reliability. The tests are voluntary, with solar panel manufacturers paying to participate in the testing. This testing process is internationally renowned and is an accurate reflection of the solar panel’s performance.

See full list of PV Evolution Labs Top Performing Solar Panels

Why is office location in Australia Important?

Most solar panel manufacturers entering the Australian market, first setup their distribution channels and worry about customer service later. This has led to many unhappy customers who are left trying to contact Chinese head offices to claim on their 10-year product warranty.

Relying on your solar installer is not always an option as we’ve seen many residential solar installers (including the large ones) go out of business well within the lifetime of the systems they are installing.

SunPower has an Australian office located in Brighton, Victoria.

How much do SunPower Solar Panels cost?

Based on Solar Choice’s database we have provided the below average costs as an indicative guide. These prices include:

  • Full turnkey Solar System with SunPower Solar Panels
  • Installation from a pre-vetted reputable installer from Solar Choice’s network
  • The STC rebate and GST
System SizeAverage Fully Installed Cost


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Panel Technologies

SunPower MaxeonSunPower IBC Cell

In 2019 SunPower released the first 400Wp residential solar panel, the SunPower Maxeon 3. This panel is currently (July 2020) the most efficient residential solar panel in the world with 22.6% efficiency. Maxeon technology panels have an expected useful life of 40 years and a return rate of less than 0.005% on over 15 million panels. The SunPower Maxeon Series consists of interdigitated back contact (IBC) solar cells. IBC technology utilises back contact energy conversion instead of the standard front contact conversion. This enables the cell to absorb more sunlight as the cells don’t have grid lines. The cells sit on a tin-copper metal system, this provides increased resistance to corrosion in comparison to the metal paste used in conventional panels. The cells are joined together by thick triple-redundant connectors, this manages the expanding and contracting of cells due to temperature changes.

Model Range Available in Australia

All of the solar panels listed on SunPower’s Australian website are approved by the Clean Energy Council for the Small-scale Renewable Energy Scheme, which is Australia’s home solar rebate program.

These are the following models:

SunPower Maxeon 2 340-360Wp

SunPower Maxeon 3 370Wp

SunPower Maxeon 3 390-400Wp

SunPower Performance 3 315-335Wp

SunPower Performance 310-335Wp

SunPower Solar Panel Specifications

SunPower Maxeon 3SunPower Maxeon 2SunPower Performance 3
Cell Number104 cells104 cells
Cell TypeMonocrystalline Maxeon Gen IIIMonocrystalline Maxeon Gen IIMonocrystalline PERC
Power Output400Wp360Wp335Wp
Rated Voltage65.8 V59.1 V36.8 V
Power Density226.28 W/m²203.65 W/m²198.62 W/m²
Panel Efficiency22.6%20.4%19.9%
Annual Power Degradation0.25%0.25%0.5%
Dimensions1690 x 1046 x 40mm



1690 x 1046 x 40mm



1690 x 998 x 35mm



Product Warranty 25 years25 years25 years
Performance Warranty25 years25 years25 years
Operational Temperature Range-40°C to 85°C


-40°C to 85°C


-40°C to 85°C


Made inPhilippinesMalaysia
Assembled inMexicoMexicoChina

Example of a SunPower Commercial Solar Project

An example of a large scale SunPower installation is the Sunraysia Solar Farm located near Balranald in southern NSW. This utility-scale solar panel farm will have over 750,000 of SunPower’s 19% efficient Performance Series modules. The panels will cover an area of 10km² and the farm is estimated to generate approximately 255MWDC of electricity, which is enough to power more than 50,000 homes. The solar construction company Decmil has designed and is building the farm. The project is due to be completed in 2020.

Sunraysia Solar Farm

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Jack Boutchard

Writer at Solar Choice
Jack Boutchard