I have 20v input and want 6v output can you set the output voltage? I need low voltage protection and the ability to step down the voltage.

What you need is called a "buck". There are 3 kinds: step-up, step-down and step-up/down. I use a step up/down buck with this low-voltage cutoff module. As the output voltage from the LiPo battery that I'm using drops from 12.4V at fall charge to 10.4V at minimum operating voltage, the buck maintains a constant 12.0V to the powered device. When the battery reaches it's minimum recommended operating voltage of 10.4V, the low-voltage cutoff module cuts off power to prevent the battery from further discharging. LiPo batteries can be permanently damaged if they fall below about 9V output (and they're expensive to replace!)

I can connect this to a li ion battery and it will output enough power for a 300w inverter? Something like 25 amps?

In your scenario, you would use this module to control a higher amperage relay that can handle the higher load. Just connect the output of the protection module to the control terminals of the larger relay.

Why is imput voltage 12-36 but output is 6-60V? Can this be used with 56V battery?

Grammatical error, 36v max, in you're case it it will work if you have access to the connections of the individual cells or banks

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2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module

2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module

Product ID: 373314962

Details

Brand
Onyehn
Colour
red
Item weight
0.06 Kilograms
Material
Lead
Product dimensions
5.7L x 4.2W x

⚡12V-36V wide input range

🔋Precise 0.1V voltage control

🛡️20A max breaker protection

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Description

🛡️ Protect your power, prolong your freedom.

DUAL MODULE PACK - Two modules included to double your protection or cover multiple devices effortlessly.
COMPACT POWERHOUSE - Miniature 57x42x19mm design fits anywhere without sacrificing performance.
SMART AUTO DISCONNECT - Automatically cuts off load at preset voltage to prevent over-discharge and extend battery life.
PRECISION VOLTAGE GUARD - Accurate 0.1V control protects your battery health with surgical precision.
UNIVERSAL COMPATIBILITY - Works seamlessly with lead acid, lithium ion, and solar panel batteries from 12V to 36V.

The Onyehn XH-M609 is a compact, programmable low voltage disconnect switch designed for 12V-36V DC lead acid and lithium ion batteries. Featuring precise 0.1V control accuracy, a clear 3-digit LED display, and a max 20A breaker, it automatically disconnects loads to prevent battery over-discharge, extending battery lifespan. This dual-pack module is ideal for solar setups and battery-powered systems, offering reliable, easy-to-set protection in a sleek, space-saving form factor.

Specifications

ASIN	B07QNXM4LS
Brand Name	Onyehn
Color	red
Customer Reviews	4.3 4.3 out of 5 stars (475)
Display Type	LED
Included Components	2x Protection Module
Item Dimensions L x W x H	5.7L x 4.2W x 1.9H centimeters
Item Weight	0.06 Kilograms
Manufacturer	Onyehn
Material Type	Lead
Model	XH-M609
Part Number	XH-M609
Smart Home Compatibility	Not Smart Home Compatible

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