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nzmikec avatar image
nzmikec asked

Cyrix-Li-ct with lead acid house battery

Hi, Just wondering if it is possible or advisable to use the lithium version of the cyrix-ct with a SLA house battery.

Im considering this because adding a lithium house battery soon. I understand I would need to control the BMS wire of the relay to enable the relay to close.

Looks like the enable / disable voltage would work with lead acid being 13.4-13.2v


Thanks, Mike

Cyrix Battery Combinercampervanlead-acid
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3 Answers
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dazey77 answered ·

I can't see a problem with this, as long as you hold the BMS line high it should work OK.

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ozzdemir avatar image ozzdemir commented ·

I am also planning to use Cyrix-Li-ct to connect 2 lead-acid batteries since my car(hybrid) charges the battery with 14.2V and Cyrix-ct seems to work with at most 13.8V. Is holding BMS line high only requirements to work Cyrix-Li-ct just like Cyrix-ct without BMS?

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nzmikec answered ·

Thanks for the answer! Do you know if the BMS line can be held at +12v (or vbatt) or is it some logic level?

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dazey77 avatar image dazey77 commented ·

Hold the BMS at +12v/vbatt. There is also a ground connection you have to make.

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nzmikec answered ·

Thanks very much! I have just ordered the relay.

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