question

aceclement avatar image

Exlplain remote on off switch for battery protect?

I thought I understood how to use the battery protect remote switch terminals to wire to my inverter on off switch thinking the battery protect would shut off the inverter upon low voltage or when I shut it off in the app. The directions seem simple enough, but it doesn't work. Iv tried every possible configuration. I understand the inverter terminal should never be connected through the battery protect, yet many people tell me they have been doing just that long term with no issues.

Why wouldn't the battery protect be designed to work with an inverter or even an inverter on off remote switch? What am I missing?

Why does this device seem useless and overpriced?

The app has no audible notification of low voltage. My inverter will drain my batteries with no help from the battery protect. Really? Why? Is my only option an annoying alarm that will wake me up in the middle of the night and force me to manually turn off my inverter? Or is there another way? Is a relay my only solution? I want the battery protect to do what it should, turn off my inverter when my batteries reach low voltage. Is that too much to ask from the battery protect that cost me $80.

I have no dc loads to use with it other than my inverter.

Thank you in advance. I sincerely hope I do not have to return the item for a refund to use a much cheaper device that will do the job.

Battery Protect
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2 Answers
Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

The remote on-off connector at the BP is to remotely switch on-off the BP, not to switch on-off other devices.
You can connect a switch there to switch the BP on-off, as it is shown in the manual.

1623340578243.pngThe BP itself is designed to switch off normal DC loads connected to the output.

What inverter do you have?


1623340578243.png (111.8 KiB)
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I see, darn it. I hoped for more useful options. Not much of a need for a remote switch if I have the app, but I guess I can use that as a backup. Still doesn't solve the issue of needing to more easily trigger the inverter to turn off automatically when low voltage occurs. Thank you for your help.

The BP is also available without Bluetooth so you only have the remote contact to switch it on-off manually.

What inverter do you have? A good inverter should have an adjustable low voltage cut-off.

hoeken avatar image
hoeken answered ·

From what I understand, you can program the Multiplus to stop inverting at a certain SoC threshold, no need for a battery protect.

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Thank you for the advice. I will look into that. It sure does seem like the battery protect is a useless device and expensive.

If you know for what it is designed for and how to use it it is not useless.