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--- opinion:frater_secessus:panelsizesforinsolation [2022/05/08 10:44]
frater_secessus [Solar panel sizing for different geographical areas]
+++ opinion:frater_secessus:panelsizesforinsolation [2024/03/20 00:01] (current)
frater_secessus [Amount of solar wattage required per 100Ah of Pb]
@@ Line 41: / Line 41: @@
 These are crude estimates about the panel wattage required to fully charge 100Ah of AGM from 50% DoD each day.  See the list of assumptions below the chart.
-^ Location       ^ [[electrical:solar:charge_controller#mppt|MPPT]] only  ^ [[electrical:solar:charge_controller#pwm|PWM]] only  ^ w/ [[electrical:12v:alternator|isolator]]  ^ w/ [[electrical:12v:b2b|DC-DC charger]] or [[electrical:generator|generator]]  ^
+^ Location       ^ [[electrical:solar:charge_controller#mppt|MPPT]] only  ^ [[electrical:solar:charge_controller#pwm|PWM]] only  ^ w/ [[electrical:12v:alternator|"isolator"]]  ^ w/ [[electrical:12v:b2b|DC-DC charger]] or [[electrical:generator|generator]]  ^
 | Seattle - avg  | 280w                                                   | 329w                                                 | 140w                                       | 103w                                                                           |
 | Seattle - Dec  | 921w                                                   | 1056w                                                | 528w                                       | 388w                                                                           |
@@ Line 56: / Line 56: @@
 Assumptions:
+  * panel output is temperature-derated according to daily average high at each time/place
   * **no other loads** other than charging are present
   * AGM deep cycle battery is discharged to [[electrical:depth_of_discharge|50% DoD]] nightly and [[electrical:12v:charging|fully charged]] the next day.  Charging efficiency 90%.
@@ Line 66: / Line 67: @@
   * solar-only charging the same number of amps into lithium would require about 10% less panel than AGM due to better charging efficiency.  Lithium can be charged successfully off alternator/generator only so [[electrical:12v:mandatory_solar|no panel would be required]].
+===== further reading =====
+  * factors affecting [[electrical:solar:output|solar harvest]]

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