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I would start by testing the voltage of each cell, then try charging each cell individually. If the cells take a normal charge and are acting fine and the problem still exists, it must be your BMS misbehaving.

Wow, sorry to hear @terrango - so far no issues with any of my cells, but if support is as poor as you indicate then others should be careful!

7kW/day sounds on the high side for the usage you outlined... how did you come up with the 7000 Watt hours per day? I also like the Growatt units... the 3kW Growatt units are quite quiet and rock solid.

It's working for me... I just logged in using this URL without issue: https://server-us.growatt.com/login

No, I've never tried - scared after reading all the reports of failed software/firmware updates for Daly units :/ You can set the SOC manually if you want - or when you charge the pack for the first time it should reset to 100 percent. But I'd contact your supplier and/or Daly directly for...

Sorry I don't have any theories... I own 6 daly's and have never seen this behavior. What do your individual cell voltages look like, normal readings? I assume you've triple checked all your connections?

That's not normal for a stand-alone pack... it should read 0. Did you connect it in parallel to other batteries? If in parallel the other batteries may be drawing from it.

I wouldn't say that's accurate... I get 100 percent output from my panels (sometimes more), and Will Prowse seems to think that's pretty normal: https://diysolarforum.com/threads/12-year-old-solar-panels-still-producing-over-100-percent-rated-power.64457/

Confirming some old panels are working OK before mounting them on my bunkie roof, and was happy to see they are still performing ABOVE their rated power output 12 years later! How are others finding power degradation over time on their panels? These are 230 Watt Canadian Solar panels - 4 in...

If that's the USB dongle you guys are referring to, then this is what I do when my plants don't show data: -check to see what the light looks like on the USB dongle... is it solid or blinking? which color is it? When this happens to mine, everything LOOKS ok (ie the light is blinking blue...

Will Wen from Daly BMS recently posted this DIY battery instructional video... some good tips in there even if you don't plan on using a Daly:

I noticed today that Daly now has a "wifi dongle" that provides remote monitoring... not much info available about it yet though:

Thanks again for everyone's advice - not sure why I haven't seen this issue previously, but it was definitely due to voltage drop from the battery clamps on posts. Switching to ring terminal leads solved the issue completely... thanks again guys!

After placing two orders in the past year that went very well, I'm happy to recommend Shenzhen Hongxinda New Energy Co. as a reputable supplier of LiFePo4 cells from China: https://hongxinda88.en.alibaba.com/ The sales rep I worked with was Eric Wang and I have been very impressed with his...

Also - based on everyone's feedback, i'm going to improve my setup by getting rid of the alligator clips and lead clamps and replace everything with ring terminals for future testing ;)

Thanks guys - I do have proper charging leads with ring terminals, but I've never seen this issue before (with my exact setup) so I'm not sure that's the issue here (but again, i'll do as suggested and will report back). @hankcurt Thanks for the info, but I do actually have sense leads and I...

Thanks Hedges - I'll do as you suggested when I get home from work tonight. Here are a couple pics from last night taken about 20 minutes after I started charging the first cell:

I am finally getting around to building my next 24v pack from 302 Ah CATL cells and have encountered a strange issue while performing the initial charge. The plan was to individually fully charge each cell using an iCharger x8 at 30amps, completely discharge each cell for capacity test, then...

Mine is right beside my breaker panel - since that's what it's attached to ;)

Those things rock - I have one for my truck and it clears it much faster than a brush.

Even though they were a major pain to install in my remote location (that's me installing them in my profile pic) I still do not regret roof mounting them. Partly because I don't spend much time here in the winter so not much maintenance is required, but mostly so that I don't have to hear my...

I thought Eco-worthy sold packs, not individual cells... mind sharing a link for the "50ah Ecoworth" you are referring to? If it's a pack, it probably already has its own BMS. Whichever cells you end up using, check their datasheets for the max charge/discharge rates and adjust your BMS...

I had this happen to me just the other day - I was building a pack for use boondocking that would be subject to a lot of vibration while travelling, so I thought I would try "Self-Locking Nylon Insert Hex Lock Nuts" to help prevent loosening. Everything went fine for assembly and BMS testing...

Which model is your inverter? Does your wifi dongle have a light on it, and if so - what is the status (which color and is it blinking)?

What is your float voltage setting, and instead of a SOC graph can you post a voltage graph?

Before getting a cottage near Bancroft we used to crown land camp near Temagami quite a bit. That's such a gorgeous area, I'm looking forward to revisiting soon!

Yes you can. Some BMS manufacturers even create modules specifically for this purpose (even allowing you to connect packs with mismatched voltages) such as Daly:

Opposite conditions? In Ontario in the Summer? I'm not sure where the OP is located exactly, but I'm at the Southern tip of Algonquin Park and with clear skies (which I get a lot of) I see 100 percent power generation from my panels - which are 10 years old at this point. EDIT - sorry, I...

A full sized fridge would likely use less power over 24 hours than your starlink router (assuming you leave your router on 24/7 also) - you may want to consider adding a fridge instead of dealing with ice (depending how long you are out there for at a time).

My capacity tests have been delayed, but I quickly scanned the QR code on the batteries - I never know which date format is being used, does this manufacture date mean December 7th or July 12th?

Well, the batteries finally arrived yesterday (April 10th) - so just under 10 weeks from time of order to my door. I'm away for work this week but will run some capacity tests when I get back next week and will post my results.

Nice, let's see some pics! My redneck topband busbars are still going strong ;) https://diysolarforum.com/threads/copper-strapping-as-busbars.46330/

Looking forward to today's daily update.

As quoted from their site: "Guaranteed to pull 304Ah+" https://www.18650batterystore.com/products/eve-lf304-grade-b-cells-3-2v-304ah-lifepo4-battery

Same... mine bounces between 60-80 watts (without the heater).