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electrical:solar:panels [2025/02/28 13:47]
frater_secessus [Specifications] 1.2 |
electrical:solar:panels [2025/03/13 14:07] (current)
frater_secessus [efficiency] bold |
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| Higher efficiency doesn't mean the panel makes more power; it means it makes more power from a given area. 100w is 100w, but you might be able to fit a 110w panel high-efficiency panel in the same space as a regular-efficiency panel. | Higher efficiency doesn't mean the panel makes more power; it means it makes **more power from a given area**. 100w is 100w, but you might be able to fit a 110w panel high-efficiency panel in the same space as a regular-efficiency panel. |
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| In general, mono has higher efficiency than poly, and poly has higher efficiency than thin film. | In general, mono has higher efficiency than poly, and poly has higher efficiency than thin film. |
| PV are generally rated by several criteria((http://www.kg4cyx.net/solar-panel-specifications-explained/)) | PV are generally rated by several criteria((http://www.kg4cyx.net/solar-panel-specifications-explained/)) |
| * **Power (W, or Pmax)**: 190 Watts. <- rated power in Watts under [[#stc_and_noct|standard testing conditions (STC)]]. You can derive **price-per-watt** by dividing $/watts. | * **Power (W, or Pmax)**: 190 Watts. <- rated power in Watts under [[#stc_and_noct|standard testing conditions (STC)]]. You can derive **price-per-watt** by dividing $/watts. |
| * **Open Circuit Voltage (Voc)**: 36.00 Voc <- Volts in full sun with no load. In practice you will likely not see Voc when hooked to the controller, but **all parts of your solar installation need to be able to cope with the theoretical Voc**. In serial arrays the Voc ratings are added. Because [[https://rvwiki.mousetrap.net/doku.php?id=electrical:solar:output#solar_magnifiers|some scenarios can cause panel overvoltage]], it is common to multiply Voc x 1.2 to find the safe PV input limit. | * **Open Circuit Voltage (Voc)**: 36.00 Voc <- Volts in full sun with no load. In practice you will likely not see Voc when hooked to the controller, but **all parts of your solar installation need to be able to cope with the theoretical Voc**. In serial arrays the Voc ratings are added. Because [[https://rvwiki.mousetrap.net/doku.php?id=electrical:solar:output#solar_magnifiers|some scenarios can cause panel overvoltage]], it is common to multiply ''Voc x 1.2''((ie, 20% buffer)) to find the safe PV input limit. |
| * **Short Circuit Current (Isc)**: 7.42 Isc <- Amps in full sun when shorted. Also theoretical, but **connectors and cables need to be sized to handle Isc**. | * **Short Circuit Current (Isc)**: 7.42 Isc <- Amps in full sun when shorted. Also theoretical, but **connectors and cables need to be sized to handle Isc**. |
| * **Maximum Power Voltage (Vmp)**: 28.60 Vmp <- voltage at which max power is generated in lab conditions | * **Maximum Power Voltage (Vmp)**: 28.60 Vmp <- voltage at which max power is generated in lab conditions |
