Located in Boulder, Colorado

	CirKits SCC3 Photovoltaic Charge Controller kit	12 Volt, 20 amp charge controller that is installed between a solar panel and a battery for charge regulation. The SCC3 can be used for cabin-sized solar systems, stand-alone solar devices, portable and automotive/marine solar power systems.
	CirKits SPC3 Solar Power Center kit	12 Volt, 9 amp solar charge controller with a 10 amp manually operated load switch, low voltage disconnect (LVD), self-contained light source and connection for additional loads. The SPC3 is designed to be the heart of a solar powered lighting system and more.
	CirKits DAS1 Dark Activated Switch kit	12 Volt, 10 amp dark activated load switch that can be used for automatic on-at-dark lighting systems. Features built-in dual white LED light source, On-Off-Auto switch and low voltage disconnect (LVD) with automatic reconnect. Works with the SCC3 and SPC3.
	CirKits BVM1 Battery Voltage Monitor kit	12 Volt color-coded LED voltmeter with low power consumption. For monitoring 12V solar/alternative energy power systems and automotive/marine/RV batteries. Ten ultra-bright LEDs indicate battery voltage in .5 Volt steps from 10.5V to 15V. Includes a switch-enabled beeper that warns of a low battery condition. Works with the SCC3 and SPC3.

See the CirKits Links to Alternative Energy Web Sites for suppliers of PV panels and batteries. We do not recommend that first-time builders construct their own PV panel, commercial panels are reasonably priced and building a weatherproof panel from raw PV wafers takes a considerable amount of work.