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Elements of a Small Off-Grid 24 Volt Solar System

Learn about the installation of a 24-volt off-grid solar system at Gary Grady's cabin in Silverthorne, CO. Discover the essential components, wiring, grounding, and equipment used for this small solar system at high elevation.

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Elements of a Small Off-Grid 24 Volt Solar System

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  1. Elements of a Small Off-Grid 24 Volt Solar System (Installed by Mack Grady at Gary Grady’s cabin, 15 miles north of Silverthorne, CO, in the Gore Range. 9200’ elevation)

  2. Cabin originally had only a 120Vac generator to power house wiring and water pump about 1 hour each day. There was no battery system.

  3. Essential Load! Watch out for shadows 150W Pair on a good day, 1kWH

  4. Use outdoor-rated UV wiring Separate grounding cable for lightning protection goes straight down to single-point ground rod Straddles the Roof for Best Azimuth Angle

  5. Ground wire connects all metal boxes to the single-point ground rod Battery charger from portable generator DC lightning arrestor Box for DC connections and breakers PV battery charge controller AC box and breakers for inverter output feed a separate set of inverter-powered outlets in the cabin 1100W Inverter

  6. DC breaker from panels to controller DC breaker from battery charger to batteries Battery charger from portable generator PV battery charge controller DC breaker from batteries to inverter DC lightning arrestor DC breaker from controller to batteries 1100W Inverter

  7. Inverter on/off switch goes to kitchen Cables to battery breaker Inverter output to AC breakers

  8. Four 6 Volt, L6 Batteries in Series (24 Volt System) in a Homemade Vented Box Battery temperature sensor goes to PV charge controller

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