LiFePO4 Batteries: Discussion Thread for Those Using Them as House Banks

[Oceanride007]

Am leaving the vessel for 3-4 months, now this time its in a wet berth, intend isolating the LFP unless I succesfully get talked out of it. Now I got 2 arrays of Solar one thru a 100-50 Victron and a 75-15. Should I just leave them both connected to the sealed LA starter battery. Need power available to run Bilge pump, and to see if I have battery power will have AIS connected.
Tried to create another profile on Victron MPPT but neither will let me maybe beacause its networked to the BMS. Thoughts welcome on suggesting LA Abs and float voltage, if I leave my LFP connected then how do I top up LA, any suggestion on why can't add another Profile to MPPT. Thks

[CaptainRivet]

Originally Posted by Oceanride007

Am leaving the vessel for 3-4 months, now this time its in a wet berth, intend isolating the LFP unless I succesfully get talked out of it. Now I got 2 arrays of Solar one thru a 100-50 Victron and a 75-15. Should I just leave them both connected to the sealed LA starter battery. Need power available to run Bilge pump, and to see if I have battery power will have AIS connected.
Tried to create another profile on Victron MPPT but neither will let me maybe beacause its networked to the BMS. Thoughts welcome on suggesting LA Abs and float voltage, if I leave my LFP connected then how do I top up LA, any suggestion on why can't add another Profile to MPPT. Thks

Disconnect the LFP definitely, before only charge it to 3,4V (change parameter end of charge). What BMS do you run that the MPPT cannot be switched to another lead Profil? Victron, unplug the VE port then you can change profiles.
I would just connect the 75/15 to the starter, actually have that fixed installed with a selector switch for unattended berthing. If it’s a Victron unplug the VE port, connect it to the starter and choose the standard Profil that fits your starter chemistry.

[CaptainRivet]

Originally Posted by newhaul

Why ?
My system will not be setup for the lifepo4 bank to start the engine if the lead is dead
I have 2 of these on the boat for emergent needs .
https://www.ebay.com/itm/20000mAh-Ca...edirect=mobile

Which means now you have a Fire hazard on board, these are LI-ion chemistry…no LifePo4 can do that current draw and are much bigger then the ones in your mobile…

[newhaul]

Originally Posted by CaptainRivet

Which means now you have a Fire hazard on board, these are LI-ion chemistry…no LifePo4 can do that current draw and are much bigger then the ones in your mobile…

Your point about the chemistry ?
I do not leave unattended when charging it .
Have you looked in your pocket at your phone , tablet, or laptop?

My tablet is almost 8000mAH

[newhaul]

Originally Posted by CaptainRivet

Which means now you have a Fire hazard on board, these are LI-ion chemistry…no LifePo4 can do that current draw and are much bigger then the ones in your mobile…

You have diesel so you have a fire Hazzard as well . What do you cook on?

[CaptainRivet]

Originally Posted by newhaul

Your point about the chemistry ?
I do not leave unattended when charging it .
Have you looked in your pocket at your phone , tablet, or laptop?

My phone much smaller Huawei, Tablet and laptop apple=never in 20 years 1 problem with their batteries.
You have 25xthe capacity of a phone with Chinese no name product with unknown cell quality there.
you cannot see if it gets a Runway eg after you store it…Tesla EV start burning days after the actual issue

[CaptainRivet]

Originally Posted by newhaul

You have diesel so you have a fire Hazzard as well . What do you cook on?

Cook on induction via LFP
Diesel a very controlled fire hazard.

[newhaul]

Originally Posted by CaptainRivet

My phone much smaller Huawei, Tablet and laptop apple=never in 20 years 1 problem with their batteries.
You have 25xthe capacity of a phone with Chinese no name product with unknown cell quality there.
you cannot see if it gets a Runway eg after you store it…Tesla EV start burning days after the actual issue

Research the pack a bit more it is not a 12 volt but rather a single 2ah pouch that runs through a buck converter to rapidly discharge into your fla to boost it to starting voltage .
It is not a short circuited cylindrical cell like in a tesla or any other ev .
DO YOUR RESERCH . I HAVE.

[newhaul]

Originally Posted by CaptainRivet

Cook on induction via LFP
Diesel a very controlled fire hazard.

Just like my jump pack which is the size of my phone