Base sheet integrated photovoltaic roofing assemblies
View Patent ↗Provided are novel building integrable photovoltaic (BIP) assemblies and methods of installation thereof on building structures. The BIP assembly includes a base sheet or a sheath, which may be a plywood board or an oriented strand (OSB) board, and multiple electrically interconnected photovoltaic inserts, which are attached to and supported by the base sheet. The base sheet is configured to be positioned directly the building structures, such as roof rafters. Various electrical components may be positioned within cavities of the base sheet and/or at the back side of that sheet. Such components are configured to align in between the roof rafters during installation. The spacing between the rafters provides access to the components and allows the components to extend away from the base sheet and into the spacing. Various electrical components may be installed and removed from the BIP assembly during its fabrication and/or installation.
1. A building integrable photovoltaic assembly comprising:
a plurality of electrically interconnected photovoltaic inserts, each photovoltaic insert comprising photovoltaic cell;
a plurality of sets of electrical leads each extending from a different one of the plurality of electrically interconnected photovoltaic inserts; and
a single base sheet comprising a front side supporting the plurality of electrically interconnected photovoltaic inserts and a back side for attaching to a building structure, the base sheet comprising a plurality of through holes, each of the inserts is attached to the front side of the single base sheet,
wherein at least one of the sets of electrical leads of the plurality of photovoltaic inserts extends into at least one of the plurality of through holes such that the at least one set of electrical leads is electrically connected on the back side of the base sheet to at least one of a) an electrical component and b) another one of the sets of electrical leads of the plurality sets of electrical leads.
2. The building integrable photovoltaic assembly of claim 1 , wherein the base sheet comprises at least one of plywood and oriented strand board.
3. The building integrable photovoltaic assembly of claim 1 , wherein the base sheet is about 4 feet wide and about 8 feet long.
4. The building integrable photovoltaic assembly of claim 1 , wherein the base sheet comprises a back side cavity configured to accommodate a component box.
5. The building integrable photovoltaic assembly of claim 4 , wherein the cavity contains a component box that does not extend beyond at least one of a front side and a back side of the base sheet.
6. The building integrable photovoltaic assembly of claim 4 , wherein the component box comprises a connector for connecting to an inverter.
7. The building integrable photovoltaic assembly of claim 6 , wherein the component box is configured to accommodate an inverter.
8. The building integrable photovoltaic assembly of claim 6 , further comprising an inverter wherein the inverter is installable into and removable from the component box.
9. The building integrable photovoltaic assembly of claim 1 , wherein the plurality of through holes and a back side cavity are configured to align between structural members of the building structure.
10. The building integrable photovoltaic assembly of claim 1 , wherein the plurality of electrically interconnected photovoltaic inserts are arranged into a plurality of rows, each row comprising a separate set of electrically interconnected photovoltaic inserts.
11. The building integrable photovoltaic assembly of claim 10 , wherein each row is offset with respect to an adjacent row of the plurality of rows.
12. The building integrable photovoltaic assembly of claim 1 , further comprising a sealing material dispensed at interfaces of the plurality of electrically interconnected photovoltaic inserts to provide environmental protection to the base sheet.
13. The building integrable photovoltaic assembly of claim 1 , further comprising a sealing flap for extending under or over an adjacent building integrable photovoltaic assembly.
14. The building integrable photovoltaic assembly of claim 1 , wherein the base sheet includes cooling perforations exposing portions of insert back sides of the plurality of electrically interconnected photovoltaic inserts.
15. The building integrable photovoltaic assembly of claim 1 , further comprising nail pointers positioned in between photovoltaic inserts of the plurality of electrically interconnected photovoltaic inserts.
16. The building integrable photovoltaic assembly of claim 15 , further comprising nail cover flaps configured to cover the nail pointers.
17. The building integrable photovoltaic assembly of claim 1 , further comprising alignment features positioned on the back side of the base sheet and configured to align the building integrable photovoltaic assembly with respect to components of the building structure.
18. The building integrable photovoltaic assembly of claim 1 , further comprising an electrical connector for electrically interconnecting the building integrable photovoltaic assembly with at least one other building integrable photovoltaic assembly.
19. The building integrable photovoltaic assembly of claim 18 , wherein the electrical connector is positioned along an edge of the base sheet.
20. The building integrable photovoltaic assembly of claim 19 , wherein the electrical connector is positioned near a corner of the base sheet.