Can three parallel connected 12 v agm batteries be connected to the low voltage disconnect?

i see no reason why they shouldn't the three just create more storage of amps. and the meter controls voltage.

Is there any circuitry to protect against relay chatter?

The LVD has built-in hysteresis on its thresholds to prevent relay chatter.

is this even worth it for 1amp device running over night? is this going to add .03a or .003a always or only when current passing through?

I felt it was worth the peace of mind knowing that no matter what I was running I would still be able to start my truck the next morning. It does draw a very small current as long as it is in the circuit - whether a device is running or not.

Isn't 12.1v too low to turn off my radios in my truck sooner than later? How long would they remain on? Does it matter for a car battery?

A cutoff voltage at 12.1V would be fairly conservative. For a lead-acid 12V battery, when its (open circuit) voltage is 12.1V, the battery is about half-full (state of charge/SOC, ~50%); of course, temperature, battery ageing and other factors would affect the exact charge left. LiFePO4 or LIB would more or less the same. For how long they would remain on, it depends on the battery Ah rating and how much current the loads (e.g. radios) drain, so we could not provide general answer. Many factors will decide if it matters for a car battery. We are at New England, so right now in Jan, I would like a peace of mind to have a 12.1V cutoff so the car can start in the morning. If the user is at a warm area, 12.1V might be an overkill.

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Low Voltage Disconnect with recessed selector, 12V/24V Auto Detect, GPC-1005B-R

Low Voltage Disconnect with recessed selector, 12V/24V Auto Detect, GPC-1005B-R

Product ID: 38514946

Details

Brand
Galley Power
Circuit Type
1-way
Connector Type
Physical
Contact Type
Normally Open
Current Rating
20 A
Material
Silicon

⚡20A continuous current

🔄Auto 12V/24V detection

🛡️Ultra-low 4.5mΩ resistance

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Description

🔋 Power smart, live smarter — never miss a beat with GPC-1005B-R!

PRECISION POWER PROTECTION - 8 selectable voltage thresholds tailored for AGM, Li-ion, LiFePO4 batteries—customize your power cut-off with surgical accuracy.
EFFORTLESS ENERGY EFFICIENCY - Ultra-low 4.5mΩ resistance slashes power loss by over 90%, maximizing battery life and system uptime.
SEAMLESS AUTO VOLTAGE DETECTION - Smart auto-detect switches effortlessly between 12V and 24V systems, eliminating guesswork and ensuring flawless compatibility.
ROBUST RELIABLE UNDER PRESSURE - Operates flawlessly from -40°F to 130°F with a solid 20A continuous current rating—built for the extremes your projects demand.
MINIMAL DRAIN MAXIMUM PERFORMANCE - Consumes a mere 0.26mA at 12V, preserving your battery’s charge when it matters most.

The GPC-1005B-R Low Voltage Disconnect is a microcontroller-based, recessed rotary switch designed for 12V and 24V battery systems. It features 8 adjustable voltage thresholds for various battery chemistries, automatic voltage detection, ultra-low resistance for minimal power loss, and operates reliably across extreme temperatures with a 20A continuous current rating. Ideal for professionals seeking precise, efficient battery protection and extended system longevity.

Specifications

ASIN	B0147DYUN8
Actuator Type	Rotary
Best Sellers Rank	#963,287 in Automotive ( See Top 100 in Automotive ) #715 in Automotive Replacement Battery Switches
Brand Name	Galley Power LLC
Circuit Type	1-way
Color	Purple
Compatible Devices	Batteries (AGM, Li-ion, LiFePO4), 12V/24V devices
Connectivity Protocol	X-10
Connector Type	Physical
Contact Material	Silicon
Contact Type	Normally Open
Control Method	Touch
Control Type	rotational
Controller Type	microcontroller-based solid-state low voltage disconnect load switch
Current Rating	20 A
Customer Reviews	4.3 4.3 out of 5 stars (43)
International Protection Rating	IP54
Item Weight	0.27 g
Manufacturer	Galley Power LLC
Material Type	Silicon
Model	GPC-1005-R
Mounting Type	Recessed
Number of Items	1
Number of Positions	10
Operating Voltage	12 volts
Operation Mode	automatic
Part Number	GPC-1005-R
Switch Type	MOSFET
Terminal	Physical
Unit Count	1 Count
Upper Temperature Rating	55 °C
Wattage	360 Milliwatts

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€ 96.83

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In stock

Sold byAmazon NetherlandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Netherlands.

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TrustScore 4.5 | 7,300+ reviews

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