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Q: 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.

Q: Is there any circuitry to protect against relay chatter?

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

Q: 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.

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

Is there any circuitry to protect against 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?

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?

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Galley Power LLCLow Voltage Battery Disconnect, 20A, 12V/24V Auto Detect

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