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electrical:solar:synopsis_puzzle2 [2017/08/01 18:10]
frater_secessus [converters] 		electrical:solar:synopsis_puzzle2 [2017/08/02 00:44]
frater_secessus [Synopsis: HandyBob's RV Battery Charging Puzzle]
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 Particularly useful and pithy statements are quoted directly. Particularly useful and pithy statements are quoted directly.
 +
 +Words of Wisdom:  "Generators?  We don’t need no stinking generators." -- HandyBob
 +
 +
 +This page aims to be a quick overview of the content on the [[https://handybobsolar.wordpress.com/the-rv-battery-charging-puzzle-2/|RV Battery Charging Puzzle]] page.
 +
 +
 +
  
 ====== Synopsis: HandyBob's RV Battery Charging Puzzle ====== ====== Synopsis: HandyBob's RV Battery Charging Puzzle ======
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 ===== charge controllers ===== ===== charge controllers =====
 +
 +Get an oversized [[electrical:solar:charge_controller|3-stage charge controller]] with an equalization function.
 +
 +Bob prefers Morningstar.
 +
 +===== MPPT boost controllers =====
 +
 +They work but the gains are found in specific scenarios like deeply discharged batteries.  The gains are more likely to be 5%-10% over PWM.
 +
 +
 +===== wiring =====
 +
 +"Big wire" is cheaper than panels for a similar gain in power.
 +
 +Wiring from panels to controller is important;  wiring from the controller to batteries is critical.
 +
 +Use stranded wire, the type (building, automotive, welding) is less important.  Use UV-shielded wire for external runs.
 +
 +> "big wire is there to limit voltage drop, not to carry amps." -- HandyBob
 +
 +
 +===== inverters =====
 +
 +Use a properly sized [[electrical:inverter|inverter]] for the job;  this may mean owning more than one inverter.
 +
 +MSW is fine unless you know you have something that needs PSW:  "residential refrigerators, washing machines, some air purifiers, some desk top computers and Craftsman brand battery chargers."
 +
 +"Soft start" inverters work work well.
 +
 +Many inverters have a high voltage disconnect (Vhvd) of 15v.  Temperature compensated charge controllers can hit 15v easily.
 +
 +===== installation considerations =====
 +
 +Install the charge controller near the batteries.
 +
 +Locate solar panels so they are not shaded.
 +
 +===== fusing =====
 +
 +Bob prefers fuses to automotive-style circuit breakers.
 +
 +Avoid fuse holders with springs in them.
 +
 +Fuse every positive wire within a few inches of the battery.
 +
  
  
electrical/solar/synopsis_puzzle2.txt · Last modified: 2020/10/11 19:48 (external edit)

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