Help me design my power pack/ switch to lithium.

[Photobug]

I am thinking of installing a lithium battery to my DIY power pack.

Because of space needed in the box for other things i am considering a battery from 40-60 AH. I have researched Battle Born and Bioenno.

Questions:

What other batteries should I look at?

Both of these batteries are equipped with some type of battery monitoring hardware. Can they be used in parallel? Is there a recommended battery that can be used in parallel?

I will be using this Power pack in two vehicles that have FLA house batteries. Will I need a separate charger to charge the lithium and FLA?

 

[shade]

Victron Energy sells a 60Ah LFP battery.

Lithium Battery Smart 12,8V & 25,6V | Victron Energy

Lithium battery Smart 12,8V & 25,6V has a longer service life, superior reliability and excellent efficiency. Find a dealer near you.

www.victronenergy.com

 

[Alloy]

Will I need a separate charger to charge the lithium and FLA?

FLA is 4 stage - Bulk - Absorb -Float - Equalize

Lithium is 2 stage = Bulk - Float

. . . . . and the voltage are different

 

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FLA is 4 stage - Bulk - Absorb -Float - Equalize

Lithium is 2 stage = Bulk - Float

. . . . . and the voltage are different

I have a Genco smart charger, it has worked well for all my needs with FLA batteries. It is supposed to also work for Lithium batteries. It does not have the best reputation or reliability. Is there a battery charger that can do both Lithium and FLA that is reliable?

 

[Alloy]

There are chargers that can be programmed for one or the other but I do not know of one that will do both at the same time.

A DC to DC charger is an option

 

[Photobug]

There are chargers that can be programmed for one or the other but I do not know of one that will do both at the same time.

A DC to DC charger is an option

Cool that is what I am looking fo anyways. I will add a battery switch so I can draw from one battery or the other and also choose which battery gets charged.

 

[luthj]

If the batteries have their own BMS (internal disconnect etc), they can be used in parallel fairly easily. Packs with no BMS need cell level monitoring, putting two batteries in parallel when you need to integrate a cell level BMS doubles the work.