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Power Supply Controller, DC Power/Battery Switch DC 12V 24V 36V 48V 10A Power Supply Battery Controller Emergency Automatic Switch Module
Designed with screw terminals for convenient wire connection
This controller is used for emergency battery switching; when there is power on main power source terminal, it will connect to main power source as power supply; otherwise, it will automatically switch to battery
When the power on main power source is back, it will switch to main power
Lost In Florida
Reviewed in the United States on January 9, 2025
Nice little relay. I needed to be able connect to three different power sources. The onboard battery, external 12v, and 120v to 12v power supply. Used two relays chained together. My wire configuration automatically starts with battery. Jumps to 12v external power, then to the 120v power supply no need for switches. Looks well made and small in size.
Carlos Adrian Vazquez Reyes
Reviewed in Mexico on July 16, 2024
Yego rápido y bien el producto
Jim M LaBonte
Reviewed in the United States on July 11, 2024
Worked perfect for my boats refridgerator. The built in board in my refidgerator which does exactly what this unit does stopped working with 110 power but works on 12 volt. I added a 110 to 12 volt server supply for the main source and hooked the battery to the backup side and works flawlessly. The original board for the fridge is no longer available and would cost over a hundred dollars. This board was cheap and effective. The power supply was pulled from a server which was cheap also around $20.00 from eBay.
PRODUCT REVIEWER
Reviewed in the United States on June 9, 2024
This is a nice compact package that is of general use in the lab - anything you need to keep powered up could benefit from one of these devices. You just need to understand what you're getting.Because you're relying on a relay to sense the loss of main voltage and then switch to alternate power, like a battery, you're going to have significant lag compared to transistorized functions. We're talking many thousands of instructions in processor time, or enough time that poor designs will see their supply voltage dip. This circuit can respond in about 70 milliseconds. So it's necessary to install plenty of capacitance on your power supply input to supply power until the supply controller can respond to the loss of main power. If your application does not involve memory or processors, and is, instead for fans or lights or something less critical, you can decide to tolerate a blink from the device as it responds.Simple design, useful in dozens of applications, cheaper than you can build it - 5 stars.
G
Reviewed in the United States on June 17, 2024
Fundamentally this is just a simple relay with a cheap power monitoring circuit. Power goes in on one set of terminals. If it stops, the other set is used. Pretty simple. However, it takes bizarrely long to detect and cut over -- like an order of magnitude longer than even a mediocre implementation of something like this.That said, if you were ordering the parts to build your own one-off, it'd cost more than this, so if that behavior is what you need, its a real good deal. If your power usage is low enough and your consumer of it has enough capacitance it may keep enough power to stay running.
とある技術者
Reviewed in Japan on October 27, 2024
説明書などは付属せず、本体だけが届きます。説明書がなくとも、電子工作の技術がある人だと機能は理解できるものですね。DCの入力先を リレーで切り替えるもので、常時使っている電源が何らかの理由で落ちると、それを検出して スタンバイしている電源（通常バッテリ）に切り替えるものですね。リレーを動かす電源はおそらくスタンバイ側から取っているはずです。
Joe Match 40
Reviewed in Mexico on October 1, 2023
Es lo que buscaba
Alexander
Reviewed in the United States on August 25, 2022
It performs power switching without problems and its voltage range allows different types of power supply, either through batteries, solar panels, regulators or PC voltage sources. I have tested with the above mentioned and it works very well, except when you use circuits that require a constant voltage, otherwise it can reset the data. I tried a wireless sensor network that sends only data but stores the data remotely and did not reset the microcontrollers by placing a 2200uf capacitor in parallel.
Al
Reviewed in the United States on August 27, 2021
works great!
Customer
Reviewed in the United States on June 1, 2020
Works as described
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