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electrical:solar:gentle_intro [2018/10/17 11:39]
frater_secessus [A gentle introduction to solar] 		electrical:solar:gentle_intro [2018/10/17 11:45]
frater_secessus [panels]
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   - is the cheapest per watt   - is the cheapest per watt
  
-This usually means framed panels, as flex panels are usually 2+ times more expensive per watt, are less rugged, physically larger for a given output, and degrade much quicker.  Flex panels do have legitimate uses but they are specialty panels not well-suited for general use.  +This usually means framed panels, as flex panels are usually 2+ times more expensive per watt and are less rugged.  Flex panels do have legitimate uses but they are specialty panels and are not recommended as a default panel for most builds.  
  
 Arrays of two 100W panels are popular because 100w panels can be shipped individually by UPS/FedEx.  Larger panels may require $$$ truck shipping; try to buy those locally if possible to avoid shipping fees.  Arrays of two 100W panels are popular because 100w panels can be shipped individually by UPS/FedEx.  Larger panels may require $$$ truck shipping; try to buy those locally if possible to avoid shipping fees. 
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 100W panels are usually nominal 12v; [[electrical:solar:panels#panel_voltage|there are also 20v and 24v panels]] one can source from the solar grid-tied market.  The higher voltages panels require a MPPT controller (see below) but tend to be cheaper per watt. 100W panels are usually nominal 12v; [[electrical:solar:panels#panel_voltage|there are also 20v and 24v panels]] one can source from the solar grid-tied market.  The higher voltages panels require a MPPT controller (see below) but tend to be cheaper per watt.
  
-The two main types of panel in 2018 are **monocrystalline** (//mono//) and **polycrystalline** (//poly//).  The technical details are unimportant but you will see panels described as mono or poly when you are researching.  Because of a quirk of voltage output their behavior, **poly panels are slightly better suited to PWM charge controllers**, and **mono panels((and "high voltage" 20v/24v panels)) are slightly better suited to MPPT controllers**.   These controllers are discussed next. +The two main types of panel in 2018 are **monocrystalline** (//mono//) and **polycrystalline** (//poly//).  The technical details are unimportant but you will see panels described as mono or poly when you are researching.  Due to relatively small differences in their voltages, **poly panels are slightly better suited to PWM charge controllers**, and **mono panels((and "high voltage" 20v/24v panels)) are slightly better suited to MPPT controllers**.   These controllers are discussed next. 
 ==== charge controller ==== ==== charge controller ====
  
electrical/solar/gentle_intro.txt ยท Last modified: 2023/11/07 11:19 by frater_secessus

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