100ah lithium battery

[donkey]

Roamer state that it is a 'Drop In Replacement' but then at the end of their blurb they state:
"You should ensure that any connected chargers are compatible with LiFePO4 batteries and configured correctly."
So not a drop in replacement for about three quarters of us?

Geoff

 

[Pablotti]

Roamer seem to sell a generic lithium battery and the have stock of the 100Ah at £600 each

Still too much for me, I cant justify them yet and I'm never on EHU

Roamer 100SMART3 - 12V 105Ah LiFePO4 Lithium Leisure Battery

The Roamer 100SMART3 is a drop in 12V 100Ah LiFePO4 battery for install in a campervan, motorhome, boat, tiny house or even when wild camping. Includes 200A continuous discharge, active balancing, Roamer BMS bluetooth app. Includes handles to make it extra portable. Free delivery, Roamercare, 10...

roamerbatteries.com

I'm currently weighing up whether to get them for my new van.

 

[BDM]

"You should ensure that any connected chargers are compatible with LiFePO4 batteries and configured correctly."

I would say that is a very upfront and commendable statement, unlike some sellers.

 

[donkey]

I agree with your thoughts, but as to whether it is a drop in replacement depends on having the correct infrastructure, which most will not have and many will not realise until it is too late.

Geoff

 

[Lenny HB]

Solar Controller has custom settings that can be tweaked for lithium. On a sunny day in the warmer months, the solar plus the alternator can provide 25-30A between them. Adequate from my point of view without additional complexity/cost of B2B.

With a Lithium only connected to the alternator without a B2B there is a high chance of burning out the alternator. Your 15amp measurement must have been with the batteries fairly well charged as with the size wiring Carthago use I would have expected 50/60 amps or more.

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[BDM]

My point was that at least they are telling you about the required 'infrastructure' before you purchase, it's not hidden away in any "small print".

 

[Lenny HB]

Roamer and KS Energy seem to sell a generic lithium battery and Roamer have stock of the 100Ah at £600 each

Still too much for me, I cant justify them yet and I'm never on EHU

Similar to me, when we get a new van (if she ever lets me) I would go the Lithium route but at the moment my 3 Gels do everything required of them.

 

[Pablotti]

Are you sure?
If a smart alternator is fitted converters normally fit a B2B as otherwise the leisure battery won't get charged.

So my 2022 Burstner (when it arrives) will likely have a B2B charger already installed?

It's coming with two 95ah AGMs. I know they won't last too long, which is why I'm thinking of swapping them for Lithium from the outset.

 

[Lenny HB]

So my 2022 Burstner (when it arrives) will likely have a B2B charger already installed?

Yes it should have one.

 

[gerry mcg]

Ive got

1. a 205Ah KS_ Energy LiFePo battery,
2. 150W solar via a Victron 75/15 MPPT solar controller
3. a Victron SmartBatterySense temperature / voltage sensor to prevent solar or mains charging of lithium if battery is at temps <5C (links to MPPT and Bluesmart IP22 Mains Charger by BT ve.smartnetworking)
4. a Votronic 1212-50 B2B that gives 50A charge rate when driving (it has an inbuilt temp sensor to limit cold charging)
5. disabled the Shaudt EBL119 built in charger by removing the 20A fuse as it only has AGM or Gel charge profiles (neither are ideal for Lithium)
6. added a 15A Victron BlueSmart IP22 Charger to provide mains charging as it has a lithium profile.
7. Victron Phoenix 500W Pure Sine Wave inverter
8. Starter battery is kept topped up by Vanbitz Battery Master
9. battery monitoring via BT enabled Victron BMV700 BMS

i think that is a pretty comprehensive setup

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[Raul]

No heated batteries on their website that I can see.

You are right, I got mixed up myself there. It’s the poweroad that’s got the self heating. But the Roamer has a nice gen two seat base 230ah with 250A continuous discharge, and 500a peak. Their 400ah flagship is on back order with 10% discount if you place order now.

 

[Tombola]

So my 2022 Burstner (when it arrives) will likely have a B2B charger already installed?

It's coming with two 95ah AGMs. I know they won't last too long, which is why I'm thinking of swapping them for Lithium from the outset.

I see manufacturers now stating "future proofing" uprated wires etc in their blurb for lithium...and some are already supplying lithium as an option.

My Rapido is geared up for it so am happy enough.

 

[Pablotti]

I see manufacturers now stating "future proofing" uprated wires etc in their blurb for lithium...and some are already supplying lithium as an option.

My Rapido is geared up for it so am happy enough.

Yes, my new van had lithium as an option too. But £1650 for the first 100ah, and £1650 for the second. I decided to go with the standard AGMs and fit lithium myself.

 

[Carpmart]

I’ve a pair of KS 200A fitted. 400W solar, Victron 30A MPPT and 60A Centaur Mains Charger running on Gel profile. No idea what the alternator to hab battery system is. I’m very happy with this and its working fine so far… fitted in May 2021. Can easily park up off grid with no solar, no EHU for 10 days in the summer. With the solar now fitted, I’m confident of two weeks plus (indefinitely) off grid..

 

[cyberyacht]

With a Lithium only connected to the alternator without a B2B there is a high chance of burning out the alternator. Your 15amp measurement must have been with the batteries fairly well charged as with the size wiring Carthago use I would have expected 50/60 amps or more.

Just under 60% when we set off. Solar was adding about 7Amps that day IIRC.

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[Lenny HB]

Just under 60% when we set off. Solar was adding about 7Amps that day IIRC.

Very low then, Carthago wiring is normally substantial but it is a tortuous route I think the cables run all the way to the distribution box in the garage & then back to the batteries.
You would get much better results fitting a B2B and bypassing those long cable runs, also you wouldn't be relying on the BMS to cut the charging when batteries are charged which is not good practice.

 

[Jimbohorlicks]

For those of you that have bluetooth lithium bms batteries ,is there a need to have a smart shunt as well.?

 

[Tombola]

For those of you that have bluetooth lithium bms batteries ,is there a need to have a smart shunt as well.?

Maybe others do but not for me no, I had the smart shunt with the Victron gear wth my old lead acids, when I changed to lithium with BMS I never used the BMV blutooth.

 

[Tombola]

get your funster discount by using the code at the top of this thread if buying the winner of this lithium experiment
KS energy, Eco Tree, Renogy, and Polinovel tested

 

[Coop]

We have fitted 2 x CERRNSS 200Ah LiFePO4 Lithium Iron Phosphate Batteries, Sterling 60 Amp B2B, Victron 240V 30A Smart Charger, Victron MPPT Solar Controller with 400W of Panels, Victron Smart Shunt and a cheap, nondescript 1000W Inverter (which we rarely use).

The batteries have inbuilt Bluetooth BMS and were sourced via extensive internet enquiries for £680 each and, to-date, have performed faultlessly.

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[ManTheVan]

Another vote for the Ultramax 100Ah served by a Sterling 30A B2B and a solar panel for which I’ve been unable to determine the capacity (100W at least, but we’ve had more out of it according to the Victron controller). Very happy indeed with its performance so far. We have never plugged in to EHU since installing, although we have an EHU pitch booked in Norfolk for the weekend, in case of vile weather, more so we can save gas.

 

[paddymcc]

For those of you that have bluetooth lithium bms batteries ,is there a need to have a smart shunt as well.?

No, the Bluetooth data from the BMS is enough for me.