That's fine if its the Lithium preset profile - if it's the out of the box factory one, it may be set to 14.4v abs 13.8fl with adaptive absorption and 1amp tail.
Will do.
I approve of your priorities!
I was discharged, which in itself is pretty miraculous. 9 months ago I had emergency open back surgery due to cauda equina with not a great outlook. But back to full duties without body armour on 12 hour shifts and walking 12 to 14 miles a day. I am under their care for life because of the CE but it is for me to contact them when/if it returns. I just have adjustments and adapting to the injury.
Out of interest Lenny can I ask why you have set absorption at 14.25v as opposed to Fogstar's recommended 14.2v for Victron kit ?
Yes I would disable Auto Equalisation and disable Equalisation voltage . If using Lithium I would use fixed Absorption (mine are set to 45mins if I remember). I have disabled Tail current, just because it can confuse the thing if you are moving or there are clouds etc, not sure but I think it works better on a fixed location. I have a lower Re-Bulk setting as well.
Fogstar on their website specifically state for Victron kit to set at 14.2v and 13.5v.
Yes enable expert mode. The battery won't charge with 13.5v or lower as you don't need a float with Lithium.
Fogstar now recommend 14.3v, I used 14.25 as someone on hear mention it worked when they found after 6 months their batteries weren't quite getting a full charge (I thought it was you).
I've disabled Equiisation.
I think it was me but I only did it for a couple of weeks.
A few months ago Fogstar changed their recommendation to 14.3v with Victron chargers.
Unless I get any problems I'll leave my settings as they are.
I keep sulking wishing I'd fitted 2 x 300ah instead of 2 x 230ah.
I wonder if it is something to do with voltage drop compensation, and where the voltage is measured, ie at the solar controller output terminal, or at the battery terminal via a shunt. or from the battery BMS's, I guess they have to recommend settings that will keep most eventualities covered including things like different chargers and makes of chargers working on a single/parralleled battery at the same time, vs ones that share the same voltage data and are all controlled by the Cerbo and synchronised for example.
Yes I keep telling myself that anymore would be overkill, but I could get a couple of 460's in there, unfortunately the existing ones seem very reliable.....I keep sulking wishing I'd fitted 2 x 300ah instead of 2 x 230ah.
I see since you posted this many people have commented and I think the question has probably been answered countless times
I understand that on the jbd bms you can turn off the “balance while charging “ toggle switch. If this is done then it will balance when not charging .
I would buy one of your 230a to marry up with mine if you go that wayI keep sulking wishing I'd fitted 2 x 300ah instead of 2 x 230ah.
Mine are as the factory set them, and sealed - They are non bluetooth types so are as they are! (Probably for the best, or I would fiddle!).
But, why? 99% is fully charged anyways. A bms that can't detect small flow of current is useless at estimating SOC. Fooling it with a higher voltage is moot. Solution, add a device ( shunt) that can do the job, and let the bms only for cell balancing and safety cut off.
Lenny think of it, those bms es are designed with cost in mind; they do well on current's at 0.2C and above. Why trust a bms to tell you a SOC cycles if it can't keep track of the amps properly. Current flow measurement is crucial for soc and cycles. Take that info with a very large pinch of salt.
Hi Raul
) the small errors on the bms will not affect me. In my 5.4m van cabling and location would be a PITA for me to do, and I don't want to pay anyone else to do it.
It's the easiest of things to fit, you can buy pre made cable on line and if you buy from off grid you get a discount
You are the expert and I'm sure a shunt is the best technical solution. For me, I feel I can manage fine without one by fully charging at the start of a holiday ( as most people will do anyway) so that the bms starts at 100%. While on holiday (2 weeks max in my circumstances
Join us or log in to post a reply.
To join in you must be a member of MotorhomeFun
Join MotorhomeFun
Join us, it quick and easy!
Log in
Already a member? Log in here.
