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--- electrical:solar:output [2022/04/15 12:45]
frater_secessus [cleanliness]
+++ electrical:solar:output [2022/10/19 10:34]
frater_secessus [Factors affecting solar panel output]
@@ Line 15: / Line 15: @@
 In practical terms, it's common to see a maximum of 75% of STC under good conditions, more under great conditions, and much less under poor solar conditions.
+===== lack of demand =====
+Solar panels do not //push// power;  they respond to the [[electrical:solar:charge_controller|solar charge controller]]'s demand as it tries to meet your present needs.  When those needs are minimal (battery already charged, small loads) the controller and panels will be loafing.
 ===== charge controller type =====
@@ Line 50: / Line 55: @@
 So a [[camping:snowbirding|snowbird]] who "chases 60" will be losing ~10% of panel output during the warmest part of the day.  Snowbirds chasing 70 will be losing ~13% of panel output.
+Note:  sub-freezing temperatures can push Voc/Vmp above their rated values.  If you will use solar in sub-freezing conditions leave plenty Voc headroom in your solar charge controller spec.
 Note: that [[hvac:insulation#heat_from_solar_panels|radiated heat from the underside of panels can raise temperatures inside the camper]].

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