question

I don't think you're going to see one. However I've been using a Votronic unit for a couple of years. Works well.

https://www.ebay.fr/itm/124045842909?hash=item1ce1b559dd:g:KKEAAOSwrxpeHZkN&amdata=enc%3AAQAHAAAA4A%2FvFXcn7%2F1BdwCCCEQvFVr6k3EpTG5Cqr7ZMNnWzps0y%2B%2B9R3o6OO%2Fk3bfO9kzHwHFjE6Uus5Y%2FriFqNhK3OKrKWa0ZElM4O33Kijioee4p4%2FC2BusszHXe%2BRNpY4U0QfocBP4%2BWxcJXyd6j3m67Ksj7Mjnhpf3h8TnKhMw%2BfVkySDPfAQBX2F08lC17Vdl2wzpu%2BzFy99KaTSimpvHqv8Oa51LszS5xEXN3DJoQR4onSiUDVwfmFU0lVd8B5BJNZPRNa1Iz7K3cAMx7vOZiGf%2Fv%2B0kHYrxII3XD07PHhKN%7Ctkp%3ABFBM_Pi2kblg

Check out either Sterling Battery Maintainer or Votronic Standby Charger. I have not used these, do not know if they are suitable or reliable, I just know of them.

Thanks, but it is not compatible with lithium battery : https://www.votronic.de/index.php/en/products/peripheral-units/cut-off-relays

The device is only suitable for use with lead batteries (acid/GEL/AGM technology), not for the combination of LiFePO4 and lead (starter) batteries.

Furthermore, I am looking for something "smart", like amt12 or http://www.lslproducts.net/ALS_Overview_Page.html

I use a AMP-L-Start and works well. Also lithium compatible.

You could use a orion tr if its only trickle charge you are looking for.

https://www.victronenergy.com/dc-dc-converters/orion-tr-dc-dc-converters-isolated

If you ned a charger you could use a orion tr smart. It can be programmed to your need.

https://www.victronenergy.com/dc-dc-converters/orion-tr-smart-non-isolated

I use a ctek ds250 dc to dc charge to charge my engine battery from my lithium battery. It work very well. It start charging at 13.1V and stop at 12.8V.

This is a newer model then mine.

https://www.ctek.com/dk/batteriladere-12v-24v/d250se

Just to give you some news, I ordered AMT12-2 to @Wildebus

Many thanks to him, he really helped to send it to france.

Since brexit, it is very complicated as many taxes are added to shipment.

So I tried a service of parcel forwarding, such as foward2me.

Unfortunately, DPD/chronopost breaked my package and stole its content :'(

For now, it is too late for me to order another one. I cross my fingers to have a compensation from foward2me, but I have few hopes...

I will wait for next year if I find another similar product shippable to france.

I wish victron provide a similar product.

And just if someone else is interested, I found another product:

http://www.lslproducts.net/ALS_Overview_Page.html
I reached them, they told me this product will be replaced by a new version with an integrated relay to stop the charge.