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--- electrical:12v:wallwart [2021/05/02 18:35]
frater_secessus [other voltages]
+++ electrical:12v:wallwart [2021/05/02 18:38]
frater_secessus [Devices with power adapters]
@@ Line 3: / Line 3: @@
 It is a common misconception that inverters are needed for everything that [[electrical:shore_power|plugs into a wall]].  Inverters are generally required only for devices that run off wall power with cord that runs permanently into the device.  Example: table lamp.
-{{ https://ae01.alicdn.com/kf/HTB1ZNnNLXXXXXbyXpXXq6xXFXXXd/12V-2A-EU-Plug-AC-Adapter-DC-Power-Supply-Plug-EURO-Regulation-Wall-Wart-Charger-5.jpg?125}}Devices that have a "wall-wart" power adapter that can disconnect from the device are typically using **DC power**, which is what is already in your car. No inverter needed. The adapter is there only to change 120vac to the required amount of DC voltage.((ie, "rectification"))   If you inspect the device or adapter it will usually indicate something like:
-  * 12vdc, 2A (24w)
-  * 5vdc, 1A (5w, typical with usb)
+{{ https://ae01.alicdn.com/kf/HTB1ZNnNLXXXXXbyXpXXq6xXFXXXd/12V-2A-EU-Plug-AC-Adapter-DC-Power-Supply-Plug-EURO-Regulation-Wall-Wart-Charger-5.jpg?125}}Devices that have a "wall-wart" power adapter that can disconnect from the device are typically using **DC power**, which is what is already in your car. No inverter needed. The adapter is there only to change 120vac to the required amount of DC voltage.((ie, "rectification"))
+**How to decide**:  *If you need an inverter for other reasons* it is often reasonable to run DC adapters from that inverter.  It is rarely reasonable to buy an inverter just to run DC adapters.

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