Build Your Own 12-Volt Emergency Backup Power Supply

Build your own emergency power supply and stay connected during power outages.

Meeting Times

Sat, 3/16/2024 1:00 PM - 5:00 PM
Sat, 3/23/2024 1:00 PM - 5:00 PM
Sat, 3/30/2024 1:00 PM - 5:00 PM

Sat, 3/16/2024 - Sat, 3/30/2024

Closed

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About

Build an emergency back-up power supply based on a 12-volt Lithium Iron Phosphate (LiFePO4) battery in a weatherproof protective case for those times when the power is out.

The first session will start by configuring the protective case to externally mount switches, connectors, and components. These components will include a dual power pole panel mount receptacle with a 20-amp circuit to power a radio or other DC device and a solar panel input connector. A USB connector with a 5-volt 4.2 Amp USB 2 and USB C ports also will be added for charging devices like cell phones and tablets and powering emergency LED lights. In addition, a switched panel-mounted volt meter will be installed. A battery isolation switch will be installed so the entire power box can be turned off for safety. A cigarette lighter-type receptacle (CLR) will be included to charge your battery operated devices such as laptop computers, tablets, or hand-held radios.

The second session will involve installation of any components not installed during the first session and wiring all the parts together. In addition, the battery and solar charge controller will be installed. This charge controller allows the use of a solar panel to charge the battery.

The third session will be used to complete configuration and wiring of the parts and test the functionality of all the components in the emergency back-up power supply box. There will be a number of instructors to assist people. Those with some building skills might be able to complete the class in two sessions.

Materials

A materials fee of $350, included in the cost of the class, covers everything you will need.

Class Policies

Ages 14 and up are welcome.

BARN Policies

View BARN's Cancellation and Refund Policy
View BARN's current COVID-19 health and safety protocols.
BARN is committed to accessibility. Tuition Assistance is available. Fill out the application before registering.
Makerspaces like BARN can be noisy and cluttered, smell strongly, and have bright or flickering lights. We try to make accommodations when requested; the earlier you contact us, the more likely we can help. Please email accessibility@bainbridgebarn.org to find out more or request an accommodation.
For those who might need physical assistance, learn more about BARN's Companion Program.

Instructors or Guides

James Henderson

Jim graduated from Pacific Lutheran University with a bachelor's degree in chemistry and biology, spent five years as an Air Force pilot, and then earned a master's degree in oceanography at Oregon State University. During his career, he explored the world’s oceans while doing highly complex technical and scientific projects. His last major project involved building, testing, and putting into operation a unique, deep-diving, manned submersible.
Now in retirement, he often can be found fly fishing in streams and rivers and exploring the western US and Canada. When home on Bainbridge Island, he's frequently in BARN's Tech or Fiber Arts studios, sewing things like zippered pouches, glasses cases, and other items to keep things organized while out and about. He's a licensed amateur radio operator (K7EXP).