San Luis Obispo, CA, United States
San Luis Obispo, CA, United States

REC Solar is an installer of solar electric systems in the United States. The company is focused on providing products and services to support residential, commercial, government and utility scale photovoltaic installations.Started in 1997 by Judy Ledford and Fred Sisson in San Luis Obispo County, California, REC Solar has grown to serve California, Oregon, Hawaii, Arizona, Colorado and New Jersey through thirteen local offices. Its photovoltaic array installations are designed and installed by in-house engineers who are certified by the North American Board of Certified Energy Practitioners. Wikipedia.

SEARCH FILTERS
Time filter
Source Type

Patent
REC Solar | Date: 2017-08-09

A solar cell (104) is disclosed. The solar cell includes a substrate (151) including a front surface (156) and front surface electrodes (153) extending along the front surface (156). Therein, the front surface electrodes comprise a plurality of bus bar electrodes (152) coupled to a plurality of first finger electrodes (1531) arranged in a parallel finger region (105) and second finger electrodes (1532) arranged in a palm finger region (106). The first finger electrodes (1531) are substantially parallel to each other and perpendicular to the bus bar electrodes (152). The second finger electrodes (1532) originate from end regions of the bus bar electrodes (152) and radially extend at least in portions thereof in directions non- perpendicular to the bus bar electrodes (152). Therein, a palm-like group of neighboring second finger electrodes (1532) originates from a same associated bus bar electrode (152) and neighboring second finger electrodes (1532) radially extend at different angles with respect to the bus bar electrodes (152). With such electrode configuration, shading losses as well as electrical resistance losses may be reduced.


A solar module and a method for fabricating a solar module comprising a plurality of rear contact solar cells are described. Rear contact solar cells (1) are provided with a large size of e.g. 156156 mm^(2). Soldering pad arrangements (13, 15) applied on emitter contacts (5) and base contacts (7) are provided with one or more soldering pads (9, 11) arranged linearly. The soldering pad arrangements (13, 15) are arranged asymmetrically with respect to a longitudinal axis (17). Each solar cell (1) is then separated into first and second cell portions (19, 21) along a line (23) perpendicular to the longitudinal axis (17). Due to such cell separation and the asymmetrical design of the soldering pad arrangements (13, 15), the first and second cell portions (19, 21) may then be arranged alternately along a line with each second cell portion (21) arranged in a 180-orientation with respect to the first cell portions (19) and such that emitter soldering pad arrangements (13) of a first cell portion (19) are aligned with base soldering pad arrangements (15) of neighboring second cell portions (21), and vice versa. Simple linear ribbon-type connector strips (25) may be used for interconnecting the cell portions (19, 21) by soldering onto the underlying aligned emitter and base soldering pad arrangements (13, 15). The interconnection approach enables using standard ribbon-type connector strips (25) while reducing any bow as well as reducing series resistance losses.


Patent
REC Solar, Institute for Energy Technology of Norway and University of Oslo | Date: 2014-11-14

The surface recombination velocity of a silicon sample is reduced by deposition of a thin hydrogenated amorphous silicon or hydrogenated amorphous silicon carbide film, followed by deposition of a thin hydrogenated silicon nitride film. The surface recombination velocity is further decreased by a subsequent anneal. Silicon solar cell structures using this new method for efficient reduction of the surface recombination velocity is claimed.


Patent
REC Solar | Date: 2012-12-03

A crystalline silicon ingot is produced using a directional solidification process. In particular, a crucible is loaded with silicon feedstock above a seed layer of uniform crystalline orientation. The silicon feedstock and an upper part of the seed layer are melted forming molten material in the crucible. This molten material is then solidified, during which process a crystalline structure based on that of the seed layer is formed in a silicon ingot. The seed layer is arranged such that a {110} crystallographic plane is normal to the direction of solidification. It is found that offers a substantial improvement in the proportion of mono-crystalline silicon formed in the ingot as compared to alternative crystallographic orientations and leads to highly uniform solar cells after an isotropic texture.


Patent
REC Solar | Date: 2013-02-01

A method for producing a solar cell with a selective emitter is disclosed. A semiconductor substrate (1) is provided. A layer (3) of dopant source material with a dopant type opposite to the dopant type of the substrate (1) is formed at a surface of the substrate (1). By applying heat to the layer (3), a homogeneous lightly doped emitter region (5) is formed. In a first lasering step, selective heavily doped emitter regions (11) are formed by applying laser light (7) to contact surface areas (9). Optionally, the layer (3) is subsequently removed and an additional dielectric layer (15) is applied to the front side of the substrate (1). In a second lasering step, the layer (3) or the layer (15) are locally removed by applying laser light (21) to the contact surface areas (9), thereby locally exposing the surface of the substrate (1). In the locally exposed contact surface areas (9), metal contacts (23) are finally formed, using for example metal-plating techniques. Using two different lasering steps for laser doping, on the one hand, and laser removal for forming the metallization mask, on the other hand, allows optimizing each of the lasering steps independently from each other, thereby enabling improvements for the processing and resulting solar cell.


A solar module and a method for fabricating a solar module comprising a plurality of rear contact solar cells are described. Rear contact solar cells (1) are provided with a large size of e.g. 156156 mm^(2). Soldering pad arrangements (13, 15) applied on emitter contacts (5) and base contacts (7) are provided with one or more soldering pads (9, 11) arranged linearly. The soldering pad arrangements (13, 15) are arranged asymmetrically with respect to a longitudinal axis (17). Each solar cell (1) is then separated into first and second cell portions (19, 21) along a line (23) perpendicular to the longitudinal axis (17). Due to such cell separation and the asymmetrical design of the soldering pad arrangements (13, 15), the first and second cell portions (19, 21) may then be arranged alternately along a line with each second cell portion (21) arranged in a 180-orientation with respect to the first cell portions (19) and such that emitter soldering pad arrangements (13) of a first cell portion (19) are aligned with base soldering pad arrangements (15) of neighboring second cell portions (21), and vice versa. Simple linear ribbon-type connector strips (25) may be used for interconnecting the cell portions (19, 21) by soldering onto the underlying aligned emitter and base soldering pad arrangements (13, 15). The interconnection approach enables using standard ribbon-type connector strips (25) while reducing any bow as well as reducing series resistance losses.


Patent
REC Solar | Date: 2014-05-02

This invention relates to a method for producing solar cells, and photovoltaic panels thereof. The method for producing solar panels comprises employing a number of semiconductor wafers and/or semiconductor sheets of films prefabricated to prepare them for back side metallization, which are placed and attached adjacent to each other and with their front side facing downwards onto the back side of the front glass, before subsequent processing that includes depositing at least one metal layer covering the entire front glass including the back side of the attached wafers/sheets of films. The metallic layer is then patterned/divided into electrically isolated contacts for each solar cell and into interconnections between adjacent solar cells.


The present invention relates to a method for production of photovoltaic wafers and abrasive slurries for multi-wire sawing of wafers for photovoltaic applications, and more specific to abrasive slurries which are easy to remove from the wafers after sawing, where the abrasive slurry comprises one part recycled abrasive slurry, an alkali in sufficient amount to provide a pH in the abrasive slurry mixture in the range from 6.0 to 9.0, and one part novel abrasive slurry in an amount sufficient to provide an ion content in the abrasive slurry mixture to provide an electric conductivity of less than 50 S/cm.


Patent
REC Solar | Date: 2013-05-15

A crystalline silicon ingot is produced using a directional solidification process. In particular, a crucible is loaded with silicon feedstock above a seed layer of uniform crystalline orientation. The silicon feedstock and an upper part of the seed layer are melted forming molten material in the crucible. This molten material is then solidified, during which process a crystalline structure based on that of the seed layer is formed in a silicon ingot. The seed layer is arranged such that a {110} crystallographic plane is normal to the direction of solidification and also so that a peripheral surface of the seed layer predominantly also lies in a {110} crystallographic plane. It is found that this arrangement offers a substantial improvement in the proportion of mono-crystalline silicon formed in the ingot as compared to alternative crystallographic orientations.


Patent
REC Solar | Date: 2014-07-02

A solar cell assembly (200) is presented. The solar cell assembly includes one or more solar cell units (211) coupled in series. The solar cell unit includes a first solar cell series (221) and a second solar cell series (222) connected in parallel. The first and second solar cell series include a plurality of cells (202) connecting in series respectively. The solar cell assembly also includes a by-pass diode (201) coupled to each solar cell unit and shared between the first and second solar cell series in each solar cell unit.

Loading REC Solar collaborators
Loading REC Solar collaborators