Lithium LifePo4 12v Batteries - Time For An Upgrade?

[JetSetWilly]

Many thanks for all the comments, I'm inclined to go for the Roamer given the price and support (and they've taken time to respond previously in this thread).

I was hoping for a straight swap but reading this, it maybe not that easy?

You will need to change the black CBE mains charger as it doesn’t have a lithium profile (unless it’s a different model from the one I’m familiar with). That should be fairly easy as you can tap into the existing cables for it. I’m assuming the installer has also correctly disabled or bypassed the charger relay in the CBE DS300 box when the Sterling was installed? That will either be the R37 resistor snipped (bottom left) or switched off (some versions have a switch) or nothing connected to the B1 positive connector (bottom right).

You reckon this needs replacing as well? I've read some people have used the CBE CB 516 with lithium but not the CBE CB 516 version 3 which has a desulphate mode?
If I do have to replace, any suggestions. TIA

 

[ginkster]

Many thanks for all the comments, I'm inclined to go for the Roamer given the price and support (and they've taken time to respond previously in this thread).

I was hoping for a straight swap but reading this, it maybe not that easy?

View attachment 265022View attachment 265023

You reckon this needs replacing as well? I've read some people have used the CBE CB 516 with lithium but not the CBE CB 516 version 3 which has a desulphate mode?
If I do have to replace, any suggestions. TIA

I replaced mine with a Victron ip65 as I didn’t want to cause any issues, plus I was going the full Victron route. In reality I’ve not even fitted it (cables in place ready) as I find the solar covers my needs. The whole point of going lifepo4 and solar for me was to be off-grid and it has totally freed me up from EHU. Makes finding camping spots/sites very flexible. I’d drop the battery manufacturer an email to see what they say about the charger.

Can you post a pic with the cover off the DS300 to see if that’s been sorted?

 

[JetSetWilly]

I replaced mine with a Victron ip65 as I didn’t want to cause any issues, plus I was going the full Victron route. In reality I’ve not even fitted it (cables in place ready) as I find the solar covers my needs. The whole point of going lifepo4 and solar for me was to be off-grid and it has totally freed me up from EHU. Makes finding camping spots/sites very flexible. I’d drop the battery manufacturer an email to see what they say about the charger.

Can you post a pic with the cover off the DS300 to see if that’s been sorted?

Any good? TIA

 

[ginkster]

View attachment 265076View attachment 265077
Any good? TIA

Well, something is connected to the B1 post so they have not bypassed the charger relay by the look of it. Can you get a pic of the resistor R37 down in the extreme bottom left to see if that’s been cut? If not, depending what’s attached to B1, the relay charger will also be charging the leisure battery. Looks like this:



Also, the positive cabling is rather odd depending on what you have in the van. The majority goes to the right hand plug whereas I’d expect to see more go to the left. The right hand plug is for fridge, step, solar and gas. The (poorly written) instruction manual for the DS300 is available here. There is also an instruction sheet on adding a DC-DC charger to the system here. I didn’t follow this as I wanted to keep the box intact in case I revert the van back to sell in the future, or remove the box and sell it. Instead I removed the engine start signal wire and have nothing connected to B1 so the charge relay doesn’t trigger and even if it did the starter battery isn’t connected to supply power from the alternator. The only downside is you lose the starter battery indicator on the control panel but that’s total crap anyhow.

 

[JetSetWilly]

I've emailed CBE asking if the CB 156 can be used with a Lithium battery so I'll await their response but I think it's looking unlikely.

I did visit my local auto electrics shop today to ask for their advice, but they haven't moved onto Lithium yet, too new for them (normal for Norfolk...)

 

[roadtripper]

I think I recall in a previous thread with this PDU and charger that one of the wires is simply used to light up an "EHU ON" indicator on the PSU control panel if you go down the replacement with a Victron charger route and find a similar extra wire than expected.

 

[ginkster]

I've emailed CBE asking if the CB 156 can be used with a Lithium battery so I'll await their response but I think it's looking unlikely.

I did visit my local auto electrics shop today to ask for their advice, but they haven't moved onto Lithium yet, too new for them (normal for Norfolk...)


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I’d recommend also emailing Fogstar and/or Roamer with the details of the charger to see what they say. I’d have thought they would give better advice than CBE.

The R37 resistor looks intact and something is connected to the B1 terminal so I’d want to be sure the relay isn’t also providing a charge. Hiwever, there is no engine running wire connected so that may well stop it charging depending how one reads the rubbish CBE instructions. If that’s the case then the other instructions I linked about adding a DC-DC seem pointless - who knows! I’m also intrigued why there are 2 connections to the B1 terminal as there should only be the one from the starter battery.