Solar panel arrangement
Apparatus, systems, and methods for designing photovoltaic panels are described herein. The photovoltaic panels are composed substrings of photovoltaic cells. The substrings of photovoltaic cells may be oriented in a horizontal fashion with respect to a layout of the photovoltaic panels. In the event of snow coverage, partial shading, mutual shading, and so forth, orienting the substrings of the photovoltaic cells in this manner enables those substrings which are disposed higher up in the photovoltaic panel to resume operation even while those substrings which are disposed lower down in the photovoltaic panel remain covered, shaded or otherwise blocked or impeded from functioning. Accordingly, the overall productivity of a photovoltaic panel designed as described herein is increased. Related apparatus, systems, and methods are also described.
1. A solar panel comprising:
a frame;
a first plurality of terminals in the interior of the frame, comprising: a first terminal, a second terminal, a third terminal and a fourth terminal;
a second plurality of terminals on the exterior of the frame;
a plurality of substrings of solar cells, comprising: a first substring and a second substring;
a plurality of direct current (DC) to DC converters, comprising: a first DC to DC converter and a second DC to DC converter; and
a switch;
wherein each substring of the plurality of substrings of solar cells comprises:
a plurality of long members;
at least one short member, each one of the at least one short member being disposed between two of the plurality of long members, and the plurality of long members being disposed substantially parallel to one another and parallel to an edge of the solar panel, the edge having a short dimension of the solar panel;
the first substring comprises a first plurality of solar cells serially connected between the first terminal and the second terminal using a first set of two long members of the plurality of long members and a first short member of the at least one short member;
the second substring comprises a second plurality of solar cells serially connected between the third terminal and the fourth terminal using a second set of two long members of the plurality of long members and a second short member of the at least one short member;
the first DC to DC converter is connected between the first terminal and the second terminal across the first substring;
the switch is connected between the second terminal and the third terminal between the first DC to DC converter and the second DC to DC converter;
the second DC to DC converter is connected between the third terminal and the fourth terminal across the second substring; and
the first DC to DC converter, the switch, and the second DC to DC converter are connected serially between the second plurality of terminals.
2. The solar panel according to claim 1 , wherein the second plurality of terminals comprises a positive terminal and a negative terminal, and the second plurality of terminals are disposed along a second edge of the solar panel, the second edge having a long dimension of the solar panel.
3. The solar panel according to claim 1 , wherein the first DC to DC converter and the second DC to DC converter are configured to execute at least one of: Maximum Power Point Tracking (MPPT); and impedance matching.
4. The solar panel according to claim 1 , wherein the first substring is connected in series to the second substring between second plurality of terminals.
5. The solar panel according to claim 1 , further comprising a first diode connected between the first terminal and the second terminal, and a second diode connected between the third terminal and the fourth terminal.
6. The solar panel according to claim 1 , wherein the first substring is connected in parallel to a third substring between the first terminal and the second terminal, and the second substring is connected in parallel to a fourth substring between the third terminal and the fourth terminal.
7. The solar panel according to claim 1 , wherein, when installed in a portrait orientation, the first substring is disposed above the second substring of the plurality of substrings of solar cells.
8. The solar panel according to claim 1 , wherein the first substring is disposed above the second substring, and the second substring is disposed above a third substring.
9. The solar panel according to claim 1 , wherein the first substring comprises a same number of solar cells as the second substring.
10. The solar panel according to claim 1 , wherein the second plurality of terminals are connected to a junction box.
11. The solar panel according to claim 10 , wherein a second solar panel is connected to the junction box, and the solar panel and the second solar panel are in serial connection or parallel connection.
12. The solar panel according to claim 11 , wherein the second solar panel has the features of the solar panel of claim 1 , and the first terminal of the solar panel is connected to the fourth terminal of the second solar panel.
13. The solar panel according to claim 1 , and further comprising a third substring, wherein the third substring is connected in parallel to the first substring between the first terminal and the second terminal.
14. The solar panel according to claim 1 ,
the first plurality of terminals further comprising: a fifth terminal and a sixth terminal;
the plurality of substrings of solar cells further comprising: a third substring;
the plurality of DC to DC converters further comprising a third DC to DC converter;
wherein:
the third substring comprises a third plurality of solar cells serially connected between the fifth terminal and the sixth terminal using a third set of two long members of the plurality of long members and a third short member of the at least one short member; and
the third DC to DC converter is connected between the fifth terminal and the sixth terminal.
15. The solar panel according to claim 14 , further comprising a first diode connected between the first terminal and the second terminal, a second diode connected between the third terminal and the fourth terminal, and a third diode connected between the fifth terminal and the sixth terminal.
16. The solar panel according to claim 14 , further comprising a second switch connected between the fourth terminal and the fifth terminal.
17. The solar panel according to claim 13 , further comprising a fourth substring, wherein the fourth substring is connected in parallel to the second substring between the third terminal and the fourth terminal.
18. The solar panel according to claim 14 , further comprising a fourth substring, a fifth substring and a sixth substring, wherein the fourth substring is connected in parallel to the first substring between the first terminal and the second terminal, the fifth substring is connected in parallel to the second substring between the third terminal and the fourth terminal, and the sixth substring is connected in parallel to the third substring between the fifth terminal and the sixth terminal.
19. The solar panel according to claim 2 , wherein the first DC to DC converter and the second DC to DC converter are disposed along the second edge of the solar panel.
20. The solar panel according to claim 1 , further comprising a controller configured to operate the switch based on an indication related to at least one of: overheating, over-voltage, and over-current.