Lithium Battery Advice

[Lavo]

Evening you beautiful bunch!

Weighing up leisure battery options. Is this everything i’ll need?
Plus a cable kit/ fuses. Does anyone know roughly long the cable needs to be from starter battery to under passenger seat?
Also i’m not sure if should get a 30 or 50a charger?
I’m sure i’ve seen a photo on here of a similar setup nicely under a seat..

 

[Bigsidavies]

As an aside, if it were me, I'd get a seperate mppt controller so that a) the two charging units can input together giving greater charge input and b) there's redundancy if you have an issue with one of the means of charging. That's a lesson I learnt the hard way when my combined unit failed at the start of a 10 week spain trip. A Victron mppt is relatively cheap in the overali scheme of things.
If budget were tight I'd prioritise mppt over shunt and add a shunt at a later date.

 

[roadtripper]

My usual advice around chargers is to fit larger but down rate it if you're in two minds about it.

Why? Because a 50A charger running at 30A will run cooler and be kinder to your battery and itself; most of the time you are not going to be using the battery so heavily it needs a massive charge rate.

Then the few weeks/weekends you are off grid and need to jump in the app and bump the rate up to 50A for that.

 

[Salty Spuds]

Do the batteries have a Bluetooth BMS?, if they do, you may not need the shunt. If not, consider putting the shunt money into batteries that have BT.