The Sunpower 308 watt solar panel is one of the highest efficiency PV modules available today. Powered by Sunpower solar cell technology, the E18 308 provides conversion efficiencies of 18.9%. Designed for residential or commercial rooftops, the panel delivers high energy production for any home or business.
Sunpower solar panels are only available for purchase with installation by authorized dealers. They are NOT sold separately.
Sunpower 308 Prices
We make it transparent and easy to compare solar prices, but you can not buy Sunpower panels separately. However, we can compare the real-world Sunpower 308 panel pricing information that is publicly available from the official reporting site of the California Solar Initiative (CSI) Program Administrators and the California Public Utilities Commission.
This presents actual costs and program data for Sunpower E18 308 watt modules and systems installed in California. These prices include modules, inverters, mounting, balance of systems (BOS) component and installation labor. Don't pay more than you have to; find some of the lowest prices for high performance solar panels here at FreeCleanSolar.com.
Average Sunpower 308 Cost per DC Watt Installed: $5.88
Compare These High Quality Alternatives to Sunpower 308 PV Modules
Sunpower E18 308 Specifications
Here is the official datasheet with electrical and mechanical characteristics, test conditions, warranty and certifications for the Sunpower 308 watt solar panels, model # SPR-308, SPR-308E, SPR-E18-308, SPR-308E-WHT-D, SPR-308NE-WHT-D, T5-SPR-308E, PL-SUNP-SPR-308E.
STC Peak Power (+/i5%) Pmax: 308 watts
CEC PTC Rating Pmax: 283.4 watts
Module Efficiency: 18.9%
AC kWh generated based on NREL PV Watts estimate
AC power monthly: 38.75 kWh
AC power per year: 465 kWh
Rated Voltage Vmp: 54.7 V
Rated Current Imp: 5.64 A
Open Circuit Voltage Voc: 64.3 V
Short Circuit Current Isc: 6.02 A
Maximum System Voltage: 1000 V IEC, 600 V UL
Series Fuse Rating: 15 A
Solar Cells Technology: 96 mono-crystalline
Front Glass: High transmission tempered glass with anti-reflective coating