Fogstar Drift 12v 230Ah Seatbase battery -- "How I Done It" --

[Skyliner33]

Thanks for all the replies.
Im currently planning my electrics layout. It doesnt look like the Fogstar is going to work for me as I have a factory swivel seat. I also need to think about where to put the inverter. I am thinking it wont go under a seat, so it looks like the battery (and all associated gubbins) will have to go near the offside wheel arch so the inverter can go near to it. (I think I need to start a dedicated thread).

 

[Soundz]

+1 on the rubber edging. In fact @Soundz it was from reading your post that I bought some before doing my install.

I purchased mine from

Small Edge Trim for Sharpe Edges - The Metal House

Our small edge trim is ideal for protecting the edges of panels and parts. Easy to fit, highly flexible and available in a range of colours. Cut to length.

themetalhouse.co.uk

Gen 3 Install. Have changed it slightly since the 1st photo. Main supply cable after the mega fuse now goes to an isolator under the front of the seat before routing to the drivers seat in conduit , rather than going straight out.

Also made a mock up of the battery which really helped, but mine was only made from cereal boxes!!

Added conduit anywhere where I thought any contact might possibly occur.

Battery is right up against the rear of the seat base (against the rubber edging) and held down at the rear by a full width wooden baton with a foam strip on the underside. At the front it’s held nice and snug by another shaped and angled bracket going across the front of the battery to the front of the seat upon which the mega fuse is secured.

Working out how to move and secure all the OEM connectors, relays and fuses is what took the most time.View attachment 223093View attachment 223094View attachment 223095

Crownfield Lithium Iron phosphate cornflakes guaranteed to give you a buzz in the morning

I probably stole the edging idea here, so no kudos for me, mind it's nice being a tiny cog in a wheel of help

 

[Soundz]

Thanks for all the replies.
Im currently planning my electrics layout. It doesnt look like the Fogstar is going to work for me as I have a factory swivel seat. I also need to think about where to put the inverter. I am thinking it wont go under a seat, so it looks like the battery (and all associated gubbins) will have to go near the offside wheel arch so the inverter can go near to it. (I think I need to start a dedicated thread).

guess that's inverter dependent? It is doable with some models there also a B2B neg bus smart shunt inside...and the 12V DC supplies outside,so they are really easy to trouble shoot............unlike the seat bases

_S2I2305 by Stuart Philpott, on Flickr

 

[Dellmassive]

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[Dellmassive]

Just dealing with the first full discharge test. . .

BMS low pack voltage cutoff is supposed to be 10v.

looks like we got down to that and the battery shut down.



.




this morning i had a low SoC warning come up . . .





the BMS showed 0% SoC way before the battery shut down . .




and the Victron shunt was showing 238Ah capacity and still going. . .




.

++++++++


so thats all good - test passed.



++++

 

[Dellmassive]

Full Re-Charge Test. . .


I have the Renogy 50A DC-DC charger in the van . . .

which has a Lifepo4 wake up feature . . . . which is good.

because the battery has shut down, some dc-dc chargers will not not start-up as they cant detect the battery. . . (a safety feature of pre lifepo4 days )


the only way to get these chargers started is to Jump the battery, ie finding some way of getting voltage across the battery terminal, for the dc-dc charger to detect, which will allow it to start up.. (ie a jump starter pack or jump leads (but use a incandescent test probe or light bulb as a current limiting device ) - https://amzn.to/41UA65c






...


not so for the Renogy and Victron chargers ,. . . we don't need to do that, just switch on and off we go.


they allow a low current charge voltage at the terminals which a sleeping lifepo4 battery will use to start charging the battery. . . until which point it will wake up and allow full charge rate. .


..

either that - or remove the battery and bench charge it. . .


+++

for for this test ill use a Victron IP65 charger conected to the van with a quick disconect cable, attached to the starter battery.

with the charger set to AGM High profile, this will charge the starter battery.




well loose a volt over the cable, so the starter battery will see 14.6v and charge nicely. . .





.

the Renogy DC-DC charger will see the raised start battery voltage and wake-up. .

and then start putting out power to the FOGSTAR battery . . . which should wake it up.



which it did. . .




the battery wakes up as expected . . .




the APP come back up. . .

and shows 13A of the 17A thats goind to the starter battery - being used to charge the DRIFT.



here are some of the status pages. . .




.

all confirmed by the Victron Shunt and Cerbo remote monitoring. . .


.



TBC . . .



.

 

[Dellmassive]

theres the full charge. . .

4pm yesterday to 830am today. . . 16hrs around 15A ish


now 100% SoC . .

 

[Dellmassive]

For those that are wondering what the Fogstar BMS programming looks like.....

DO NOT TOUCH THE BMS PROGRAMING, ITS A SAFTEY FEATURE !!!! And invalidates the warranty.


(unless you really, really know what you're doing)

Didn't see a mention of the heater, so assuming it's a stand alone module.

...



...

 

[roadtripper]

Well there are lots of levers to pull and get yourself into trouble there

 

[t6blo]

For those that are wondering what the Fogstar BMS programming looks like.....

DO NOT TOUCH THE BMS PROGRAMING, ITS A SAFTEY FEATURE !!!! And invalidates the warranty.


(unless you really, really know what you're doing)

Didn't see a mention of the heater, so assuming it's a stand alone module.

...
View attachment 225920View attachment 225921View attachment 225922View attachment 225923View attachment 225924View attachment 225925View attachment 225926View attachment 225927View attachment 225928View attachment 225929View attachment 225930View attachment 225931View attachment 225932


...

Password protected in my app with the Drift 105

 

[Dellmassive]

Yes, they are all password protected.... To prevent tinkering.

Believe it or not I actually guessed the correct password first time.

 

[T6ChrisO]

Yes, they are all password protected.... To prevent tinkering.

Believe it or not I actually guessed the correct password first time.

'RoamerSucks'

 

[Dellmassive]

LOW TEMP charging. . .

playing with the Renogy dc-dc charger here --> Low temperature lithium battery

i added the temp sensor check the charge blocking feature of the charger .


-2.0c outside.



the renogy charger app showed -1.0c and charging blocked.



the Victron app agreed showing -1.0c at the battery terminal,





but the FS Drift showed slightly different. . . 0.3c ( the battery has 3x temp sensors)




so a slight difference in temp readings. . . . .

i warmed up the Renogy charger temp sensor to allow charging,

and the FS happily started drawing 30A. . .



i wasnt so happy about this as it seemed that the internal heater had not kicked in yet - assuming it hadnt seen below 0c yet.

and the battery was taking full charge current so close to the 0c mark (0.3c)

there not mention od the heater in the BMS settings that i can see,

but there is the low temp cut off point (UTP) in the BMS settings . . . so i changed that from 0c to +2.0c (this will allow for the 2degc discrepancy i am seeing across the various temp sensors) - now im happy that the battery wont take full charge current below or near 0c.




that done the trick . . . .

the battery shut off the incoming charge and raised the UTC alarm (Under Temp Charge)



checking this at the Vic` shunt we 49W, around 4A still going into the battery.

even though the charge is OFF, . . . so im assuming this is the power for the Heater id its running?

50W / 4A seems about right?

the Renogy Smart heated needs 4A for the heater.

the Poweroad Heated needs 8A for its heater.




above 0.5c the UTC battery flag cleared. . . and the charger toggle flipped to ON again.

i thought the reset value was 5c? . . . but ill have to recheck that?


looking back the previous screenshots , , ,

we see:

UTP - 0.0c
UTP release - 5.0c
delay - 5sec.

that implys to me that the flag is triggered below 0, and will keep the charge OFF until the temp rises above 5.0c for 5seconds?

so not so sure, will need more testing.?




.

looks like i need colder temps to really see the Heater in action.




.