Is 48v nominal? Really more like 56v or more while charging 4 - 12v lead acid batteries in series?

Dear Addison,No. Please note that the working voltage of this switch is 12V-48V DC. Hope this will be helpful to your purchase.

Can you put two lines going out of the switch? I have two different bus bars and would like the on/off switch to turn both off at the same time.

No. Use a 1.2, both, off swihch. It is made to switch two batteries, but you can simply use it backwards to do what you want. https://www.amazon.com/Kohree-1-2-Both-Off-Disconnect-Vehicles-Waterproof/dp/B08MT19MS2/ref=sr_1_10?dchild=1&keywords=kohree+battery+switch&qid=1622817696&sr=8-10

Can you put the single on/off switch on two batteries in series? Just need to shut off both and turn back on both at the same time.

You could but don’t know why. If you want 12 v and you have two 6v batteries in series to make 12v then the two 6v can be cabled together all the time and the switch is used to disconnect both batteries at once.

Can you remove the red knob itself?

Dear Harri,No, it can’t be removed. The red knob is for On/Off control. Hope this information can be helpful to your purchase. If you have any question, please feel free to contact us through sending us Amazon messages.

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Description

🔌 Cut the power, not the adventure — stay in control with Kohree!

POWERHOUSE PERFORMANCE - Handles up to 275 Amps to keep your vehicle or boat energized without a hitch.
VERSATILE VOLTAGE RANGE - Supports 12V to 48V systems, making it ideal for RVs, ATVs, cars, and boats alike.
MARINE GRADE WATERPROOFING - IP54 rating ensures reliable operation even in wet, harsh environments—perfect for adventurous professionals.
SECURE EASY INSTALLATION - Comes with 4 mounting bolts and spade terminals for a rock-solid, no-fuss setup.
MASTER CONTROL AT YOUR FINGERTIPS - Rotary ON/OFF actuator offers intuitive power isolation to protect your battery and electrical system.

The Kohree Battery Disconnect Switch is a robust, waterproof power isolator designed for 12V to 48V systems, supporting up to 275 Amps. Built with marine-grade IP54 protection and easy mounting hardware, it ensures reliable battery management for RVs, ATVs, cars, and boats. Its rotary ON/OFF control offers quick, secure power cut-off to safeguard your electrical system during storage or maintenance.

Specifications

Operation Mode	ON-OFF
Current Rating	1 Amps
Operating Voltage	1 Volts
Contact Type	Normally Closed
Connector Type	Plug In
Brand	Kohree
Terminal	Spade
Item dimensions L x W x H	7.2 x 7.2 x 10 Centimeters
Circuit Type	1-way
Actuator Type	Rotary
Contact Material	Plastic
International Protection Rating	IP54
Number of Positions	1
Lower Temperature Rating	1 Degrees Celsius
Upper Temperature Rating	1 Degrees Celsius
Controller Type	Push Button
Control Method	Touch
Connectivity Protocol	Bluetooth
Colour	Black
Wattage	2.184E+4
Net Quantity	1 count
Number of Items	1
Manufacturer	Kohree
Country of Origin	USA
Model number	HY1620
Specific Product Use	personal
Item Weight	210 g
Product Dimensions	7.19 x 7.19 x 10.01 cm; 210 g
Item model number	HY1620
Item Height	3.94 Inches
Item Width	2.83 Inches
Voltage	12 Volts
Included Components	1 x USB Lighter
Are batteries included?	No

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