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I couldn't wait till the delivery of the standoff to make top protection for the active balancer. (I will do it later). I completed the installation of the balancer and BMS. There is enough space between the balancer and BMS, that shouldn't be a big problem As expected balancer does a great...

I wish it had a DC breaker instead of a fuse. :)

So far, I have had a good experience with Seplos. I placed an order on the 18th of December and received all the items by the end of Feb 2023. but I know the freight forwarders are a nightmare. they don't update tracking, and after registering for the delivery notice, they just appear on the...

I decided to install an Active balancer for the Mason 280 DIY kit. This is the PowerPaul version of the Heltec 5A Active balancer. Hopefully, this will keep all cells nicely balanced. I just did a test fitting to check the space; planning to have nylon standoff and plastic covering to cover the...

LOL. I also got bitten by the Lynk Shunt too. I too seriously regrate paying too much money for it and selling my lovely Smart shunt.

Hmm, I didn't order that with my batteries. It was 150 USD; I planned to use the "Victron lynx power in" to connect the batteries. Are those circuit breakers are compatible with DC. from your pictures, they look like rated for AC voltage.

HI Has anybody modified the Seplos Mason DIY 280A kit to have a DC breaker instead of the fuse? I like to have something to switch off the battery if needed.

I really tempted to buy one of those batteries from Greenbank, it is quite cheaper than buying cells from china and doing a DIY job. also noticed they are rated output around <=80A. I haven't seen anybody use these batteries in AUS yet.

May I ask, where are you buying cells from?

This person assembles LiFePO4 batteries in victoria. seems to have good reviews. but I haven't used them personnaly. https://www.facebook.com/search/top?q=powerpaul%20australia I imported 32 cells from a group buy and got less than grade B cells. so be careful when you import them directly...

probably your is a new design with active balancing. Mine looks different.

hmm. that seplos BMS is different to mine. 200A version has terminals for positive and negative connections.

Welcome to the form. I'm from South east melbourne

yes, 16s 310ah (sold as 310ah, but actually I think 302ah)

do you have any sample configuration for the 48v battery? My pack voltage doesn't increase over 53.46v

@upnorthandpersonal, you should add this to the resources page. Too valuable to lose in the forum. I'm sure somebody will ask this question again and again.

Check out this guy. He is seller is from Australia he does ship internationally, but don't know is that economical or not based on your location. I purchased bur bars from him and they are really good (listed prices in AUD)

My main concern would be the quality of that switch and compliance with your country electricity code. I would consider a change over switch similar to this on a known brand...

That is going to cost heaps to send even undamaged cells back to Michael with proper packing and declare them as LiFePO4 cells. In my case that would be cost more than the original purchased price (Australia to the USA). remember these calls came with bad packaging and without declaring them as...

Seplos 48v 200A 8S-16S BMS User Manual

I got 32 calls from Michael which are supposed to be 310ah. (shipping and cells had a big drama, but that is totally different story). some of them were bloated and some were not, I tested few cells and they only reached the capacity of 290is ah.

@ Ludditeal, Can you do a capacity test on one of your cells, all of my tested cells failed to meet the 310ah mark.

Anybody designed or build a box/ cover to protect the BMS from elements?

another mob in Australia sells similar batteries for a cheaper prices (compared to prices in Australia). but only 2 years warrenty. https://www.ebay.com.au/str/greenbanksolaraustralia?_trksid=p2047675.l2563

I know that is going to be an expensive project. but I'd like the idea and look is important too..

I got my second delivery of the CATL 310ah cells on weekend (supposed to be New CATL 310ah cells with your choice of terminals. Tested, matched, and labelled for capacity). Cells seem didn't suffer much shipping damage event the packing is similar to last time. However, cells have the same...

Yes, pictures are here https://diysolarforum.com/threads/lishen-270ah-272ah-cell-group-buy.14668/post-321608

In my case agreement was "New CATL 310ah cells with your choice of terminals. Tested, matched, and labelled for capacity." so it is implied the cells come with QR code intact (QR code bogus or not). but what I received is * QR code scratch off * wrong terminal size * No labelled for capacity...

I just checked and my terminals look like M6, I asked for M8. I haven't received any nuts too. I only had busbars on 3 boxes (out of 4)

Same with mine too

CATL 302Ah Datasheet

CATL 271Ah Datasheet

Louisvdw, is your driver supports Heltec (JK) BMS ? https://diysolarforum.com/threads/heltec-jk-200a-smart-bms-with-2a-active-balance.17831/

Batrium supports monitoring multiple cells using the K9 modules, but many of the BMS in the market don't. Many of these battery layouts are designed for generic 16s BMS systems, which can only monitor 16 batteries in parallel.

both battery systems in the picture have multiple batteries in parallel before make them serial. eg xP16S and what you planning to do is 16SxP This document may help you to understand. https://diysolarforum.com/resources/cell-configurations-for-12v-24v-and-48v-lifepo4-batteries.42/