NOTE: These backstock modules are in mostly new condition, though some can display minor scratches or discoloration of their backsheets.
The planet's most powerful solar panel.
The SunPowerTM 318 Solar Panel provides today’s highest efficiency and performance. Utilizing 96 back-contact solar cells, the SunPower 318 delivers a total panel conversion efficiency of 19.5%. The 318 panel’s reduced voltage-temperature coefficient, anti-reflective glass and exceptional low-light performance attributes provide outstanding energy delivery per peak power watt.
SunPowerTM Solar Panels are the most efficient photovoltaic panels on the market today.
Our panels produce more power in the same amount of space—up to 50% more than conventional designs and 100% more than thin film solar panels.
Reduced Installation Cost
More power per panel means fewer panels per install. This saves both time and money.
Reliable and Robust Design
Proven materials, tempered front glass, and a sturdy anodised frame allow panel to operate reliably in multiple mounting configurations.
|Power at STC (W)||318|
|Module Efficiency (%)||19.5%|
|Vmp: Voltage at Max Power (V)||54.7|
|Imp: Current at Max Power (A)||5.82|
|Voc: Open Circuit Voltage (V)||64.7|
|Isc: Short Circuit Current (A)||6.20|
|Max System Voltage (V)||600|
|Series Fuse Rating (A)||15|
|Connector Cable Length (mm)||1000|
|Module area (m2)||1.63|
This product is shipped from one of our warehouses in Northern California. Orders placed after 12 p.m. will typically ship the following business day. To see an estimate of our delivery times, click here.
Returns & Replacements
Products can be returned for a refund within 30 days of receipt if unused and in original packaging. Returns are paid for by customer unless product is defective or damaged, in which case Real Goods assumes responsibility. Please use Fedex, UPS, or USPS with tracking, for returns.
Returns of solar panels, inverters or other large ticket items will incur a re-stocking fee of up to 20%. Freight shipping is non-refundable.