But when you go to pay for them, the VAT is removed. And somehow these cells go from China to Poland (where EU VAT should be paid) and then to Ireland and nobody here receiving them ever pays any VAT as they came from within the EU, so no VAT is due. I doubt the VAT was ever paid in Poland, but that is not our concern.
That's the beauty of these. And that's why we all keep going back for more 😁
This is for Seplos Mason battery boxes though, not cells. And the VAT is paid with this seller, it is on Alibaba, not Aliexpress.
Still too expensive for a nice box though.
So update on the state of my battery pack that I managed to wire wrong and start a fire.
I cleaned off the burned bits, fixed the BMS leads and bolts, top balanced the entire thing, wired it up and it seems to be working ok.
56.91V & 98% SOC , all cells at 3.56V and I managed to convince my better half to keep going with it.
I'm right back to where I started which was the Seplos going into short circuit protection mode on discharge 😫
thanks for all the help and encouragement to put it back together, much appreciated.
Now if anyone know how to fix or what causes a SCP warning on seplos I'd appreciate some advice
Post a copy of your parameter file. Maybe you mis-set something.
Does it trip immediately or maybe when the load increases ?
What size are your DC cables from the batteries to the Seplos, and from the Seplos to the Inverter ?
Personally, I only connected the positive from the battery to one of the two positive busbar connector points. The same for the connection to the inverter. I'm using DC 10mm cable for these links.
The cables are 3AWG/25mm from the battery->bms->inverter
I managed to get 1-2 amps but the BMS quickly (5-10 seconds) shuts down with the SCP issue on discharge.
I've attached the parameters that I downloaded before the rebuild
If you go in to the log you can see if it is one alarm or if something else going on with it and if the cell voltage readings are holding stable
Well Notepad++ told me immediately that your settings file and mine are identical - so nothing there amiss
Photo of the seplos? Might be something straight forward
So I think there's an issue with the BMS. When I looked this morning it was saying that the pack was at a high state of charge 97%+
I then disconnected the battery to ensure that everything was wired correctly to the inverter and when I reconnected the BMS the SOC had dropped to 10%.
Here's the events that were captured during at the time (ignore the timestamp as its incorrect)
Once it hit this the inverter started charging the pack and then I started getting a high pressure and a monomer high voltage alarm.
I'm gonna contact seplos and see if there's a new firmware that can help with this.
I'd let them charge. Just because it dropped to 10% doesn't mean that it's faulty. As it hits the monomer high values, it will back off and try balancing a few times, and then change the SOC to 100%
I think your issue is the error where it reports cell 1 and 2 as having zero volts or close to it. Had similar and turned out to be poor connection between the terminals and bus bars. No matter how many times I rebuilt or moved batteries or wires around always showed voltage drops on cell 1 and 2 and then a short circuit alarm. After taking sandpaper to each bus bar and terminal in the pack and putting a tiny bit of conductive paste on each issue went away
yea I'll try that. It's stuck on standby now so I'll wait until I get the conductive paste and try again.
I'm still confused as to why it dropped SOC from 97% to 10%. I had finished top balancing it the night before and it wasn't discharging.
Don't believe everything a BMS tells you 😂
Voltage will give a decent indication of state of charge. What's the pack voltage?
Seplos needs time to calibrate it will settle after a while
"Don't believe everything a BMS tells you"...I wish I knew this earlier 😂
it's 53V and now the SOC is 28.8%......still chucking a SCP alert when discharging
I'm wondering if its related to this https://diysolarforum.com/threads/seplos-bms-output-short-circuit-protection.35755/page-2 but I've pinged seplos so lets see what they come back with
One full charge and discharge should be enough
53V (while there is no load or charge) is about 80-90% SOC
Only ever trust the BMS that is located between your ears 😁
Hi Noelocon,
Looking at your images and I am looking for exactly where you got the standoffs as per below?
I got a mate to 3d print them for me from these designs https://www.thingiverse.com/thing:5265259/files
No access to a 3d printer here. Might look for a company that does and see what the cost is.
I thought wine corks were the trend
Your local secondary school will have one if they have have engineering or technology as a subject
Stupid question but which ones do I have to print? (please don't say all!!!)
for the standoffs. 3 of these
Theres a lid, that clips on the seplos, and then a case for the screen (that can mount to it)
If you had said I could have sent some down with the sofar2mqtt!
My local library has one.
Damnit!!!!
I have a printer idle at home here. Might move it out to the shed and start printing out a few bits.
Would pay you a fair price if your interested.
So I have confirmation that PWOD and OYE store are one in the same, I know it has been long expected to be the case but I now have proof.
I purchased through PWOD and as I am going for a green loan I needed an invoice with all of the details for AIB. The online order details and automated emails weren't enough. So messaged PWOD asking for a manual invoice, get one with everything in it pointing to OYE store.
I used OYE for my 32, murderously slow delivery and communication not the best but got there in the end.
Bought 16 cells from oye store and 16 from pwod last year on the same day. Conversations with both in relation to things were nearly word for word and both deliveries showed up on the exact same day. Boxes were marked 1/32, 2/32 etc. 100% the same company
Got my 32 from PWOD, arrived the following week!!!!!!!!
