Lithium batteries

[dennych1]

Who has installed lithium batteries but didn’t change your charging from truck to camper batteries by adding DC to DC charger

[dennych1]

Thanks I think I will just rely on 510 watts of solar

[pianotuna]

mbloof wrote:

pianotuna wrote:
Since Li don't want to be taken to 100% I can't see why a dc to DC booster would be particularly useful.

Since when? Can you quote a source for that information?

The Battleborn battery I own and even the DIY LiFePo4 cells I bought along a with proper BMS have no issue with being charged to 100%.

- Mark0.

Many many many sources.

Some BMS systems have the 90% set to read as fully charged. Battleborn might be one of them.

The ideal is 40% to 90% for most Li chemistries.

They tolerate 20% state of charge well. But lifespan may be shorter.

Here is a source that suggest maximum of 80% SOC:

https://electrek.co/2018/05/04/are-you-killing-your-lithium-batteries/

[mbloof]

pianotuna wrote:
Since Li don't want to be taken to 100% I can't see why a dc to DC booster would be particularly useful.

Since when? Can you quote a source for that information?

The Battleborn battery I own and even the DIY LiFePo4 cells I bought along a with proper BMS have no issue with being charged to 100%.

- Mark0.

[pianotuna]

Since Li don't want to be taken to 100% I can't see why a dc to DC booster would be particularly useful.

My "skinny" OEM wire is #8--perfectly capable of carrying 40 amps. It is not the wire that is the problem, it is the ECM of the chassis.

Are the battery management systems able to be set to stop charging at 90% state of charge?

[thedavidzoo]

We have 400Ah of lithiums and 640W solar on the roof. Plenty of juice and plenty of charging. We have no need to charge by truck which is measly anyway with the skinny wires and not even worth hassling with.

[mbloof]

My Battleborn LiFePo4 battery is mostly charged by 136W of Solar and MPPT Li compatible charge controller.

I did not bother to upgrade or update the charging from the truck. My use needs don't need it.

When in a pinch, I have a 1000W Yamaha generator and can use the stock AC/DC converter to charge the battery. Granted it won't charge it fully or 'optimum', again, my use case(s) don't require or need that.

For those that travel a lot and go from place to place and only stay 1 night at each place maybe better truck charging makes sense for them. Not needed for me.


- Mark0.

[Lwiddis]

Solar recharging is a bunch more simple for all RV batteries.

[Kayteg1]

I read lot about it on Sprinter forum, but Sprinter owners on average have more money to spend.
They install $2000 water heaters as well.
Using straight alternator charging you will not recharge those batteries to 100%, but it will still work at lower capacity.
Most of users set it with solar charger, who will do 100% recharging, so for most of the users, alternator charging is secondary only.