Search results

Hi All, I've built myself 2 x 4S batteries using CATL 302Ah cells using a JK-B2A8S20P BMS each. Could have built a single 4S2P, however as this is going in my caravan I like having the redundancy. I have built the batteries as a mirror config of the other so the end + posts at one end and -...

My unit is used and out of warranty, not sure if that is a blessing or not ?. Anyway, pulled my unit apart today and the Yate Loon d90bh-12 fan was not functioning. Have ordered a replacement, hopefully this was the issue all along.

Does have a fan that does not seem to be spinning up. Manual says a temp above 50c or 10A charge will engage it. I'm definitely hitting the latter.

Hi All, Hooked a 50% discharged 300Ah LFP battery to my Renogy 3000W inverter/charger the other day to see how it handled the job. Both battery and Renogy are sitting on the floor of my study with no obstructions, ambient temperature is around 20c. After charging at the full 75A for about 30...

Hi All, I have a Renogy charger/inverter and a 300Ah LFP battery I am wanting to setup in my shed to power my always on computers. Idea being overnight the computers are powered from the battery and then during the day I'll use a smart plug to turn on the AC feed to the Renogy while my house...

Hi All, Building a couple of CATL 302Ah 4 cell batteries at the moment. I'll have the BMS mounted to the side and they'll end up going direct into a standard battery box with a layer of rubber lining on the bottom. Once in place I don't anticipate opening these battery boxes a lot, however I...

Thanks for that. Didn't so much want an optimal angle calculator, more a way of discerning what the production fall off is the further off that optimal angle you get.

Howdy, Just wondering if anyone knew where I could find a formula or online calculator, etc, to help me calculator potential production losses in my portable panels from their angle relative to the sun? The panels are meant to be perpendicular to the sun, but how do I calculate potential loss...

Hi All, I have a Renogy 3000W inverter/charger and 40A Epever MPPT solar charge controller which were purchased for a project that didn't go ahead. The MPPT is 12 or 24v, however I the Renogy is 12v only. I was wondering if there were any regulations in Australia which might prevent me from...

Hi All, I have a 15A shore power charger in my caravan (max output voltage 14.4v) and am just about to upgrade my battery bank to 2 x 300Ah 12v batteries. I have solar and DC DC charge sources sorted and I'm now wanting to boost my shore power charge capacity. I've just got myself a basic 3...

Hi All, Have watched a load of DIY battery build videos. I think I'll mostly be ok with that, what I find a bit daunting is finding a reputable place to purchase the goods. Being in Australia I've not been able to find any local suppliers without massive mark up prices. We call it the Australia...

Battery health mainly. I expect these will be B grade cells, so would be good to have a frame of reference on their health as I put them into service.

Hi All, I recently bought a couple of basic Eco Worthy 12v 100Ah liFePO4 batteries which seem to checkout on a straightforward capacity test. Just wondering what the best way is to test the internal resistance of these batteries where I can't get access to the cells directly? Is using a...

Good to know about those cut off values, was wondering why they'd have the defaults set so far above the max of all the lithium batteries I've ever had. Have set the float to 13.5v and the boost cycle time to 120m (it was set to 0). Thanks for the tips!

Hi All, Using a 40A SRNE MPPT in my van to charge 2 x 100Ah lithium batteries in parallel. The default lithium profile seemed a bit aggressive to me with boost and float set to 14.4v and voltage charge limit and voltage cutoff set to 15v and 16v respectively. Using this profile I charged my...

Thanks for the replies. No problems with 15A as yet, was really thinking in context if I get this extra battery. 15A would only be a problem if the 300Ah capacity was close to fully exhausted *and* we only planned to stay a single night *and* we had no prospect of solar generation the following...

Hey All, Feel like this might be a daft question, but can't seem to find the answer to it anywhere (further evidence of it being daft), so here goes. Currently have 2 x 100Ah LiFePO4 batteries in parallel and will likely be getting a 3rd in the short to medium term for my van. I've set myself...

Thanks so much for the assist! My system is all 12v with the inverter being the only large load device. My current thinking is I will get one of the Bussmann 187 Series 200A breaker for my inverter connection and then use a 250A fuse for the battery itself. I think I'll run the other loads off...

Hi All, Have dabbled in electronics over the years, however only just beginning to deal with serious current now that I am looking to do an uplift on my vans electrics. I suspect like many newbies I purchased this basic bimetallic breaker (in my case a 200A version) with the intent for it to...

Sorry, I was not clear here at all really was I. These are rigid panels being mounted on aluminium brackets. I'll actually be replacing one of the factory panels and notice they only use adhesive. M6 bolts make sense for strength, my concern is they introduce an entry point for moisture.

Dang, glad I read this thread. I just bought 3 of these circuit breakers. 1 X 15A for my diesel heater and 2 x 40A for PV to MPPT and battery to BMS. I have double pole switches for anything above 40A. Is it just higher amperages these car audio breakers are no good, or are they just entirely...

Hi All, Picked up some Silkaflex 522 as it looked about the best option at my local hardware shop for sticking my new solar panels to the roof of my van (solar panels 1480mm X 670mm @ 12kg each). Since had a discussion where I was told I absolutely want to use the Silkaflex 291. I looked up the...

Hi @_Rein_ , did you end up going with the Eco-worthy battery? I'm in aus too, was about to buy 2x100Ah Renogy batteries when I saw these on eBay much cheaper and with some good reviews to boot.

Looking to replace my single battery with a couple of 100Ah LiFePO4 batteries in parallel. Have seen a few reviews of the Eco-worthy 100Ah batteries showing capacity wise they are as advertised. No bells and whistles on them, but seem to be otherwise pretty good value for money if you don't...

One question about the 45 day rolling data. Is that feature only available with the BMV-712, or do you get that with the Shunt only as well?

Thanks again, I'm starting to see that now. Lot manufacturers seem to lay it down pretty thick that you need a lithium compatible charger for lithium batteries. From my understanding now it seems so long as your lead acid charger does not have any higher voltage desulphation or equalisation...

Glad you found their product lineup as confusing as I did, very daunting when it was my first exposure to 12v systems. Not to mention expensive, especially for what they are. It was going to cost me over $1000AUD to upgrade to the lithium compatible J35B-L BMS, even then I'd still have the same...

Thanks for the replies. The impression I was given by BMPro support was the Shunt is fine, it is the BMS I have it paired with that is unable to calculate SOC properly. This is their reply when I asked them about connecting a lithium battery to my J35B BMS. The problem with my current BMPro...

Hi All, The BMPro BMS in my van is not lithium ready, so the BMPro shunt that integrates with it that I bought back when I had an AGM is no longer accurate for tracking SOC of my new lithium battery. I was about to buy the Victron 500A SmartShunt, however before doing so though I just wanted...

Hi All, I've been thinking of upgrading to 2 x 100Ah Renogy batteries in parallel. These are not the SMART versions as from what I can tell the biggest advantage of the SMART batteries would be the 4000 rated cycle life and the RJ45 port to support systems integration using the RS485 Protocol...

I will do, thanks for that advice. Fuse I have is like this one which both cables terminate at, so should be fully covered. Have been talking to some fellow caravaner's who have suggested I replace my battery as my requirements are probably too high for it. They are about to get 2 x 100Ah...

Thanks everyone for the replies. It's really appreciated! I'm using the cables that came with the inverter which is two runs of 5AWG each for positive and negative. Looked again this morning and realised I actually have a 100A fuse between the battery and inverter. Inverter is rated as 2000W...

Hi All, I purchased a 120Ah 12v LiFePO4 battery which specified a maximum continuous discharge of 150A as I have a 2000W inverter connected which needs occasional, short term heavy draw. I've put a 120A fuse on the battery which to my understanding means the maximum discharge C-rate is 1. I've...

Thanks for that, so sounds like retailers are just laying it down thick to try and get a sale. I did ask about the voltages, however never got a direct/suitable reply from any of them. Float voltage is 13.6v on my BMS. Think I'll stick with what I've got for now, only about $200 for a basic 22A...

Hi All, I have a BMPro J35B BMS in my caravan which does not have a Lithium charge profile. To replace it with the model that does have a lithium charge profile would cost me over $1000AUD. I have checked the manual for the J35B and there is no mention of higher voltage desulphation or...