question

xdorland avatar image
xdorland asked

Lithium battery (not a Victron)...but with a Cyrix-CT (...not a Cyrix-Li-CT)

A few month ago, I hade to change my GEL batteries by a lithium battery on my camper. The seller told my "you have a Cyrix, so you can have a lithium battery".


I know discover that the Cyrix-CT connect ALWAYS my lithum battery with the engine battery (...which is a lead battery of course)

==> The voltage of the two (very different) battery are always the same

==> When I strat my engine ON...the lithium battery always "helps" the engine battery"

==> Big problems for the future.

==> What solution can you propose to me?...I could replace ce Cyrix-CT by a Cyrix-Li-CT...but it is written on the manual that I need to have a Victron VEBus BMS https://www.victronenergy.com/upload/documents/Manual-Cyrix-Li-ion-120-A-EN.pdf

Thank you in advance

Lithium BatteryCyrix Battery Combiner
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2 Answers
Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

The thresholds of the normal ct are to low and you get the behavior you currently have.

So you should replace it with a li-ct and connect 85 to (+) of your battery or BMS if available.

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xdorland avatar image
xdorland answered ·

Thank you for your answer.

...si you think that I can just replace the cyrix -CT by a cyrix-Li-CT?

...but what about the Victron l'animal instructions ? I do not have to have a BMS? (It is even written that it compulsary...but in a French website of a seller : https://www.myshop-solaire.com/coupleur-de-batterie-cyrix-li-ct-12-24v-120a-victron-energy-_r_851_i_706.html

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