LVD1 Circuit Board, Assembled LVD1 Wiring Diagram
Photo of an assembled LVD1 kit (IC sockets not included). LVD1 wiring diagram

LVD1 - 12 Volt 15 Amp Low Voltage Disconnect Kit

The LVD1 kit is used for automatically controlling the power to 12V solar-powered battery-operated electronic devices. It shuts down power when the battery voltage drops to a selected voltage, protecting the battery from damaging excessive discharge conditions. Power is either automatically or manually reconnected at a selected voltage when the battery is recharged.

An adjustable low-voltage indicator warns of the impending power outage. The low-voltage signal is externally available, allowing computers to monitor the condition and perform a graceful shutdown. The low-voltage signal can also be used for triggering a variety of low-voltage warning systems.

The LVD1 has an on-board On/Off switch and an on-board Auto-on/Manual-on switch for both unattended and attended operation. It can control a 12V load of up to 15 Amps. The LVD1 is perfect for controlling solar-powered computer systems, radio repeaters and WiFi systems. With a simple extension circuit the LVD1 output logic can be inverted, allowing it to be used for automatically starting generators and AC-operated battery chargers.

An external source of 12V DC power is required, suitable power sources include a solar-charged battery or an automotive/marine electrical power system. The LVD1 is designed to operate in conjunction with the CirKits SCC3 solar charge controller, a 12V rechargeable battery and a photovoltaic (PV) panel.

Controls include an on-board Off/On switch and on-board Auto-on/Manual-on switch. Indicators include a red Load-on LED, an amber Low Voltage Detection LED and two green Calibration LEDs which can be jumper-disabled for saving power.

See the LVD1 specifications for details on the kit's capabilities.

The kit includes:

Solder is not included with this kit.

Kit Prices and Shipping

Payment Methods

Taxes (Colorado Residents)

Customers who live in Colorado should add $2.16 tax per kit to the total price of the merchandise.

Payment by PayPal / Credit Card

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LVD1 U.S. Mail, First Class
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LVD1 Outside of U.S. / Overseas Orders

Payment by Mail

If you would like to mail your payment, total the price of the kit or kits with the desired form of shipping and tax if you live in Colorado. Include the address to ship to and an email address if you would like shipping confirmation.

Send checks or postal money orders to:
P.O. Box 3500
Boulder, CO  80307-3500
Your order will be processed and mailed when the payment has been received.

More Information

Email: cook (at) cirkits dot com
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