AEVA Forums

it has very important point , when running in off-grid , if during winter time you have low solar power , the internal power consumption is higher than charging rate , in my case seems that 50W is too low for stopping the inverter to avoid discharging the batteries , it destroyed my batteries by di...

Thanks rinaldoparaipan , vlan_one and CrAzY_DrIveR . Coulomb and I love to hear when our work has been helpful. :) vlan_one, I have added "Voltex MKS 5KVA" to the list of known model names on the index page. Thanks. CrAzY_DrIveR, that's an interesting looking battery. But please wrap those spanners ...

It's an SMCJ51A, a 51 volt unidirectional transient voltage suppressor (TVS) in an SMC package. Datasheet here: https://www.diodes.com/assets/Datasheets/ds19003.pdf It is likely to be available from many suppliers, such as Element14, Digikey, Mouser and RS Components. Since that TVS has failed, it's...

Our longest running house power RV battery packs are just over 8 yrs old and test at 100% capacity using the same 0.5CA capacity testing Winston use according to their specs books that come with the cells. ... It will be interesting to see just how long these systems will maintain their 100% of the...

affer wrote: ↑

Tue, 14 May 2019, 02:26

where do i normally get firmware updates from?

You normally get firmware updates from whoever you bought the inverter from. In your case, MPP Solar.

Why not just clean the mating faces before assembly and use a jointing compound to prevent corrosion?
https://www.cabac.com.au/products/lugs- ... s/10102005

*gets out of time machine* We're using 200 Ah SunGels from Battery Energy. 10 year warranty. According to their charts, the cycle life at that DoD isn't much shorter than their standby life. Dave - how are these batteries going? are they getting expected service life? Sadly they did not. The manufa...

AndreaIta wrote: ↑

Tue, 30 Apr 2019, 20:06

Hi all, I would path my inverter to fix charger bug.
To be sure, i ask you if i can and wich firmware version i must install.
My firmware version is 72.40 - 1.24

Thnk u very much

73.00e

I'm assuming the 10 yrs is calendar age and not used cycle life. How many cycles do you think you got out of the 40 Ah Sky Energy LFP cells? Probably only 500 cycles. 700 at the most. I think most of the ageing has been due to time and temperature. They spent the first 3.5 years of their life on a ...

Welcome suorama apam and Robbe01 . Thanks for your input. I started this new topic for the PIP-5048MK (Axpert King 5K) so your posts don't get lost in the huge PIP-4048/5048MS topic. I'm sure we'll be hearing a lot more about the MK in future. Yes. Please let your suppliers know about the problems y...

Welcome @suorama @apam and @Robbe01. Thanks for your input. I've started a new topic for the PIP-5048MK (Axpert King 5K) and moved your posts there, so they don't get lost in this huge topic. I'm sure we'll be hearing a lot more about the PIP-MK in future.

Well sleuthed Richo. For those asking about datsheets, here's one for an Altair Nano 60 Ah prismatic LTO. http://altairnano.com/wp-content/uploads/2015/11/60Ah-Cell-Data-Sheet.pdf And here's one for a 40 Ah 66160 LTO that is probably not from Yinlong. https://files.ev-power.eu/inc/_doc/attach/StoIte...

Thanks for trying. It's just bad luck with the available dimensions in the MX-5.

Stacking them 17 high doesn't leave room for aluminium bar or rectangular-tube to distribute the strapping pressure. 16 is the max. Removing the tubes from between rows of cells not only reduces cooling but also structural strength. Reducing the manifolds from complete end-plates to individual squar...

Looking through the build I'm thinking what you need is a liquid battery pack that can just be poured into the car to fill all the nooks and crannies Hee hee. You're sooo right. :) Jeff Owen and Mike Van emmerik did a brilliant job of helping me squeeze cells into every nook, and quite a few cranni...

I wrote the following before receiving your latest above. I believe we can only stack the cells 16 high in the 215 height because we need a 16 mm overhead for strapping and manifold. n x 12 + 16 I see from your other thread, https://www.aeva.asn.au/forums/viewtopic.php?p=70178#p70178 that the cells ...

Yes Mike, I'd want to preserve something like that. I'm willing to stretch it to 34 NMC cells (143 V) between contactors for this exercise. The limit of 28 LFP cells was only because we had many rows of 14 cells due to the chassis rail spacing, so 28 was convenient. We could have gone to 32 LFP cell...

That's right. Thanks Brendon. The sizes of the other battery boxes can be calculated in one dimension as as 123.5 mm per row plus 6 mm overhead, and in the other dimension as 46 mm per cell plus 34 mm overhead. I'd prefer not to use the 908 x 130 space behind the rollbar as it gets too hot there, fr...

Your modules look good too Chris, but I'm afraid the price is OOTQ. In case Francisco can figure a way, here are the MX-5 dimensions: All the battery spaces in the MX-5 are 215 mm high. The existing cells are a total of 218 of 40 Ah LFP (nom 3.2 V), all in series. The 6 largest spaces can be seen he...

Just remember that the shelf life of the [LTO] battery won't be much better than any other battery. Hi Richo. Can you tell us why you think that? I've been searching, and I can find precious little about the calendar life of LTOs. It just seemed to me that since they are considered to withstand hig...

I've been meaning to post here ever since Francisco visited me many weeks ago. I wanted to know if I could use his battery modules to replace the ageing pack in the MX-5. And Francisco was keen to know more about the LyteFyba BMS. It was a very fruitful meeting. After having seen his samples, as wel...

I have 3 of those 40Ah Sky Energy cells if you want them. I check their voltage but they should be at about 3.2V. Haven't used them since the 4th one in the set died. Thanks wovenrovings. That's very kind. I'm guessing they would be of similar vintage to those in Mexy (Mid 2009) and so might have a...

In anycase - back on topic - I did find a youtube video of Yinlong doing destructive tests on thier LTO battery. Bit of a let down - no bangs, or balls of fire. https://www.youtube.com/watch?v=eAUYbSDEy6I Useful video. But I didn't see the point of the "Gasoline burning test". There was no way to t...

Richo wrote: ↑

Wed, 03 Apr 2019, 13:04

weber wrote: ↑

Tue, 02 Apr 2019, 14:22

And I could paint the word "capacitor" on my cat.

Would you wash your cat after ...?

Well, I wouldn't want to to in-capacitate it. Ba-dum tish.

Okay but the box, even the burnt ones, says capacitor. And I could paint the word "capacitor" on my cat. :) Did Arvio actually claim/admit somewhere they are really ALL LTO's No. Of course not. or are we still basing it on our assumptions? I've always allowed that there might be a few real supercap...