1. E20/435 SOLAR PANEL
20% EFFICIENCY
SunPower E20 panels are the highest-
efficiency panels on the market today,
providing more power in the same
amount of space
MAXIMUM SYSTEM OUTPUT
Comprehensive inverter compatibility
ensures that customers can pair the highest-
efficiency panels with the highest-efficiency
inverters, maximizing system output
REDUCED INSTALLATION COST
More power per panel means fewer panels
per install. This saves both time and money.
RELIABLE AND ROBUST DESIGN
SunPower’s unique MaxeonTM cell
THE WORLD’S STANDARD FOR SOLAR
TM
technology and advanced module
SunPowerTM E20 Solar Panels provide today’s highest efficiency and
design ensure industry-leading reliability
performance. Powered by SunPower MaxeonTM cell technology, the E20
series provides panel conversion efficiencies of up to 20.1%. The E20’s
low voltage temperature coefficient, anti-reflective glass and exceptional
low-light performance attributes provide outstanding energy delivery per
peak power watt.
SUNPOWER’S HIGH EFFICIENCY ADVANTAGE
20%
20%
19%
18%
15%
14%
10%
10%
5%
THIN FILM CONVENTIONAL
sunpowercorp.com
Patented all-back-contact solar cell,
providing the industry’s highest
efficiency and reliability

2. E20/435 SOLAR PANEL
MO DE L : S P R- 4 3 5 NE - W H T- D
ELECTRICAL DATA I-V CURVE
Measured at Standard Test Conditions (STC): irradiance of 1000 W/m², AM 1.5, and cell temperature 25° C
Peak Power (+/– 5%) Pmax 435 W 1000 W/m² at 50° C
Cell Efficiency η 22.5 % 1000 W/m²
Panel Efficiency η 20.1 % 800 W/m²
Current (A)
Rated Voltage Vmpp 72.9 V
500 W/m²
Rated Current Impp 5.97 A
Open-Circuit Voltage Voc 85.6 V 200 W/m²
Short-Circuit Current Isc 6.43 A 80 90
Maximum System Voltage UL 600 V Voltage (V)
Temperature Coefficients Power (P) – 0.38%/K
Current/voltage characteristics with dependence on irradiance and module temperature.
Voltage (Voc) – 235.5 mV/K
Current (Isc) 3.5 mA/K
TESTED OPERATING CONDITIONS
NOCT 45° C +/– 2° C
Temperature – 40° F to +185° F (– 40° C to + 85° C)
Series Fuse Rating 20 A
113 psf 550 kg/m² (5400 Pa), front (e.g. snow)
Grounding Positive grounding not required Max load
w/specified mounting configurations
50 psf 245 kg/m2 (2400 Pa) front and back
MECHANICAL DATA (e.g. wind)
Solar Cells 128 SunPower MaxeonTM cells
High-transmission tempered glass with Impact Resistance Hail: (25 mm) at 51 mph (23 m/s)
Front Glass
anti-reflective (AR) coating
Junction Box IP-65 rated with 3 bypass diodes
Dimensions: 32 x 155 x 128 mm WARRANTIES AND CERTIFICATIONS
Output Cables 4 700 mm cables / Multi-Contact (MC4) 3
connectors Warranties
2 25-year limited power warranty
1
Anodized aluminum alloy type 6063 (silver); 10-year limited product warranty
Frame
stacking pins
Weight 56.0 lbs. (25.4 kg) Certifications Tested to UL 1703. Class C Fire Rating
D D
DIMENSIONS
300 11.81
MM 883 34.78 764 30.07
4X 398 15.68
(IN) 2X 684.1 26.93 433 17.06
(C) 29.5 1.16
322 12.67 4X 230.4 9.07
C C
523.0 20.59
(B)
1002 39.45
1046 41.18
(B)
BOTH (B)
ENDS
54 2.13 (A) B
B 2067 81.36 539 21.22
4X 3.2 .13 1200 47.24
(A) - MOUNTING HOLES (B) - GROUNDING HOLES (C)
16X Ø6.6 [.26] 8X Ø4.2 [.17] 1423 56.02
(C) - STACKING PINS
4X Ø6.1 X 3.2 [Ø.24 X .13]
UNLESS OTHERWISE SPECIFIED:
DIMENSIONS ARE IN MM 3939 NORTH FIRST STREET
TOLERANCES ARE: SAN JOSE, CA 95134 USA
Please read safety and installation instructions before using this product, visit sunpowercorp.com DECIMALS ANGLES (408) 240-5500
for more details. THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION OF THE SUNPOWER
CORPORATION, AND ITS RECEIPT OR
A
sunpowercorp.com
POSSESSION DOES NOT CONVEY ANY RIGHTS
MODULE ASSEMBLY, 128-CELL, A
TO REPRODUCE, DISCLOSE ITS CONTENTS,
OR TO MANUFACTURE, USE, OR SELL
© 2011 SunPower Corporation. SUNPOWER, the SunPower Logo, and THE WORLD’S STANDARD FOR SOLAR, and MAXEON are trademarks or registered trademarks
DO NOT SCALE DRAWING ANYTHING IT MAY DESCRIBE.
MATERIAL
of SunPower Corporation in the US and other countries as well. All Rights Reserved. Specifications included in this datasheet are subject to change without notice.
REPRODUCTION, DISCLOSURE, OR USE
WITHOUT SPECIFIC WRITTEN AUTHORIZATION
OF THE SUNPOWER CORPORATION IS
DATASHEET DRAWING
Document #001-65754 Rev*A / LTR_EN
STRICTLY FORBIDDEN.
SIZE DOCUMENT NUMBER REV.
DRAWN DATE CS 11_318
FINISH Z. Kinyon 11/23/10 B 001-53962 *C
CHECKED DATE
001-04212 DRAWING TEMPLATE
SCALE 1:16 B SIZE MILLIMETER SHEET 1 OF 1
4 3 2 1