Offset building integrable photovoltaic structures and assemblies having multi-conductor return lines
View Patent ↗Provided are novel building integrable photovoltaic (BIPV) structures having multiple photovoltaic portions offset with respect to each other along their lengths. An offset direction can correspond to the length of a row of installed BIPV structures. In some embodiments, a BIPV structure may include three offset photovoltaic portions and three corresponding flap portions for extending under photovoltaic portions of adjacent structures and sealing interfaces between installed structures. The novel BIPV structures can facilitate installation, while providing the flexibility to avoid obstacles. Provided also are novel BIPV assemblies having multi-conductor return lines extending through the assemblies. A BIPV assembly having a multi-conductor return line may include a return line for the assembly itself, and one or more return lines for other assemblies.
1. A building integrable photovoltaic assembly comprising:
a photovoltaic module, comprising:
a front side,
a back side,
one or more photovoltaic cells disposed along the front side,
a first contact point,
a second contact point, and
a first edge and a second edge formed by the front side and the back side, defining a length of the photovoltaic module and defining boundaries of the photovoltaic module;
a multi-conductor return line, comprising:
a first bus bar that extends between the first edge and the second edge, and
a second bus bar that extends between the first edge and the second edge;
a first module connector provided along the first edge and comprising:
a first conductive element,
a second conductive element, and
a third conductive element; and
a second module connector provided along the second edge and comprising:
a fourth conductive element,
a fifth conductive element, and
a sixth conductive element; wherein:
the first conductive element is electrically connected to the first contact point,
the fourth conductive element is electrically connected to the second contact point,
the first bus bar is electrically connected to the second conductive element and the fifth conductive element,
the second bus bar is electrically connected to the third conductive element and the sixth conductive element,
at least two of the first, second, third, fourth, fifth, and sixth conductive elements are configured to make a direct physical and electrical connection with a conductive element of another photovoltaic module,
the first conductive element, the second conductive element, and the third conductive element are electrically insulated from each other,
the fourth conductive element, the fifth conductive element, and the sixth conductive element are electrically insulated from each other, and
the first module connector and second module connector are wholly within the boundaries defined by the first edge and the second edge.
2. The building integrable photovoltaic assembly of claim 1 , wherein:
the first module connector further comprises a seventh conductive element,
the second module connector further comprises an eighth conductive element,
the multi-conductor return line further comprises a third bus bar that extends between the first edge and the second edge,
the third bus bar is electrically connected to the seventh conductive element and the eighth conductive element,
the seventh and eighth conductive elements are configured to make a direct physical and electrical connection with a conductive element of another photovoltaic module,
the seventh conductive element is electrically insulated from the first conductive element, the second conductive element, and the third conductive element, and
the eighth conductive element is electrically insulated from the fourth conductive element, the fifth conductive element, and the sixth conductive element.
3. The building integrable photovoltaic assembly of claim 1 , wherein the multi-conductor return line is removably attached to the photovoltaic module.
4. The building integrable photovoltaic assembly of claim 1 , wherein the first bus bar has a cross-sectional area at least about twice greater than a cross-sectional area of the second bus bar, or the second bus bar has a cross-sectional area at least about twice greater than a cross-sectional area of the first bus bar.
5. The building integrable photovoltaic assembly of claim 1 , wherein the first bus bar and the second bus bar have substantially the same cross-sectional areas.
6. The building integrable photovoltaic assembly of claim 1 , wherein the first bus bar and the second bus bar are insulated by a shared insulation sheath.
7. The building integrable photovoltaic assembly of claim 1 , wherein the photovoltaic module comprises a photovoltaic portion and a moisture flap portion, and wherein the multi-conductor return line is positioned in the moisture flap portion.