Hello, i have connected my MultiPlus to 25s LTO battery. 35ah by cell. It work very good, high efficiency charge discharge. I have bms (1.5v to 2.8v) I hace configure MultiPlus 50v
Min and 62.5v Max voltaje
I have been seriously thinking about trying this, but ultimately did not attempt to simply due to the price of LTO cells vs energy density vs overall cycle life compared to LFP or NMC, which just didn't seem to make sense to me, at least for my application... That being said, I don't see why it would not be possible depending on what model Quattro/Multi you are using. I am using 24V Multis, which have a maximum input of 33VDC and can charge up to 32VDC...
LTO cells have a 2.3-2.4v nominal, 2.8v max, and around 1.6v-1.8v cutoff voltage to my knowledge depending on the manufacturer.. For my inverter I probably would go with an 11S configuration using LTO cells, which would give me a maximum voltage of around 30.8v absorb, and low voltage shutdown around 19.8v.
This is a pretty wide range which I don't like about the LTO cells, but I think will still work without any major issues. You would likely need a custom BMS that will not connect with the Victron, and would need to be capable of controlling it's own internal charge/discharge protection switch. I have had good experience with the Bluetooth Enabled BMS boards from China, simmilar to this one here which unfortunatley does not have Bluetooth, but is for LTO cells: https://www.lithiumbatterypcb.com/product/4s-or-3s-12v-lifepo4-battery-pcb-for-14-4v-or-14-6v-lifepo4-battery-of-back-up-power-bms-and-power-inverter-battery-protection-circuit-2-3-2/
These manufacturers usually can offer you a custom solution for your needs if you contact them however.
ee21, thank you so much for your explanations. This is very interesting. I will see that soon.
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