You shouldn't have any issues with those WullyMerl what do you think of the specs on those Ecoworthy batteries I got. I thought they looked alright with some nice features but I picked the wife because of looks but never looked at the spec look where that got me.
ECO-WORTHY 12V 300AH Lifepo4 Lithium Battery Bluetooth with SOC LEDs and Low Temp Protection | Eco Worthy
Upgrade your power solutions with Eco-Worthy's 12V300Ah LiFePO4 Lithium Iron Phosphate Battery Bluetooth with SOC LEDs and Low Temp Protection when the data-collector be connected, so you can remote monitoring and control you battery through the ECO-WORTHY Smart APP, ensuring real-time access to...uk.eco-worthy.com
Whilst down Hereford in a few weeks time I'll be collecting 32 of these bad boys from Ross on Wye for my proposed DIY solar storage system.
They'll be making a 628Ah 48V 16KWh battery but built in 12v mode they would make one helluva 2500Ah leisure battery
Just 1 Rob.
I look forward to hearing how well that went. It would be great if it worked.
That is the opposite of my experience.
As we've previously touched on in a different thread, what you're referring to is the additional voltage needed to drive the actual chemical process of charging, this is called overpotential.
When a battery charger specifies a maximum battery size, you can't really tell why.
As I said, my experience is the opposite of that. I have two battery banks in parallel, charged by the same b2b charger, monitored by hall effect sensors (so no voltage loss) and the lithium consistently charges at a lower terminal voltage and a higher current.
This doesn't apply for me: either bank could happily take the full output of the b2b.
The only reason I can see to use a VSR is to avoid having to connect a lead to d1.
I'm not really sure I follow what you mean by cable gauge of 2.5mm. Gauges are generally integers, and get smaller as the cables get bigger. Double the gauge and the wire is thinner. To me, this is nearly as daft as using 'cups' in recipes. I suspect this isn't what you mean.
Thanks, I admit i've yet to test but that's not what published data says but admittedly that data will be for brand new LA batteries, LA soon goes 'soft' with cycling and age and consequentially the terminal voltage rises and charge current drops off. How are you doing the measuring/testing and what's the age of the LA? What's the capacity of the LA compared to the LFP? What's the SOC of the LA compared to the LFP? I know you've got a hybrid system...I'd have expected the LFP to do the donkey work for the first 3/4 of the discharge cycle and then the LA to catch up and finally take over, if so then the LFP will typically draw more charge current in a parallel setup because it's higher potential means it get's discharged sooner than the LA.
Surely the terminal voltages are pretty much identical....after all they are connected in parallel. The only difference in terminal voltage is cable volts drop under load, that should be tiny unless you've used under sized cables? Im guessing the difference is a few millivolts and down to whats mentioned in the thread above.
Not getting into pedance Geek and I'd appreciate it we can keep this a sensible technical discussion so come on mate....you know exactly what 2.5mm cable is....dont be a dick, you're better than that.
My [very] limited electrical knowledge suggests that, if it's cable we're talking about, it's more likely to be impedance we should be discussing ... but not for use in the ohm ...Surely the terminal voltages are pretty much identical....after all they are connected in parallel. The only difference in terminal voltage is cable volts drop under load, that should be tiny unless you've used under sized cables? Im guessing the difference is a few millivolts and down to whats mentioned in the thread above.
Not getting into pedance Geek and I'd appreciate it we can keep this a sensible technical discussion so come on mate....you know exactly what 2.5mm cable is....dont be a dick, you're better than that.
Resistance for DC, Impedance for AC SteveMy [very] limited electrical knowledge suggests that, if it's cable we're talking about, it's more likely to be impedance we should be discussing ... but not for use in the ohm ...
Steve
Resistance for DC, Impedance for AC Steve
Now that was either brilliant or I'm dumb and slow and missed Steve's joke( which I admit I do with most of Steve's puns.)
Told you that electrical knowledge is limited, Merl - bright as a glow worm's armpit when it comes to this topic ...Resistance for DC, Impedance for AC Steve
. But I do understand syntax, which is more than the BBC sports journalists do - they report that Garnacho was fined for 'speeding to Liverpool Crown Court' which would require 2 prosecutions - one for speeding when leaving the Man Utd Training Ground, and a second for speeding to Liverpool Crown Court ... 
My understanding, (which could be wrong) was you could safely use 10x the a/ah output of the charger without any risk of overload. These days decent branded chargers probably don't have any such restriction but I remember checking with A and N caravan services (very respected for this in the days before lithium) and that's what I was told. Last time I checked the web site was still up with all their findings, I think it may be you can go to 15x the output but not double checked so stayed safe at 10x. Of course that applied to LA technologies not to lifepo4 that will take much more current.
Each to their own Steve, everyone needs a hobby ehTold you that electrical knowledge is limited, Merl - bright as a glow worm's armpit when it comes to this topic ...
Steve
Told you that electrical knowledge is limited, Merl - bright as a glow worm's armpit when it comes to this topic ...Resistance for DC, Impedance for AC Steve
. But I do understand syntax, which is more than the BBC sports journalists do - they report that Garnacho was fined for 'speeding to Liverpool Crown Court' which would require 2 prosecutions - one for speeding when leaving the Man Utd Training Ground, and a second for speeding to Liverpool Crown Court ... Akin to Jeremy Thorpe's Memoir about his career as an amateur boxer - 'My Hammerings in the Ring'Each to their own Steve, everyone needs a hobby eh
I remember a coffee spurt moment when the BBC news common tater was announcing the retirement of Nicola Adams the British boxer, she said Nicola had decided to retire because " She was tired of being punched in the ring".
Surely that's not legal under the Marquis of Queensbury rules?