Pink7

Is it voltage or the Current (Ah) level who make the parallel connection to transfer current between the packs? Pink

Yes they are in parallel with wires between the 2 breakers. Pink

Update: Just come to my main that the 2 JK BMS do not communicate with each other so then that part of my idea will not help, but the inverters do communicate but does they do anything related to manage how much current to charge/de charge each battery/inverter pair? ( INV1/Bat1 vs INV2/Bat2) Pink

So I have do some more checking and 2 times switch to charge the one battery only to balance the current between the 2 batteries. What happen next is the bms will reverse my operation by less charge current to the battery I just charged up to same level. I also noticed that voltage on the battery who BMS now give less charge have a slight higher voltage so i gues thats maybe why this happens. My first thought is to get both batteries back to fully charged and then I guess or hope there is a voltage calibrate option on the BMS. Pink

Thanks for that input Crossy. I just switched to charge the one battery with both inverters to close the gap (30Ah), and was able to see in app that the current made sense at least on lower current. Yes cables are quite equal in length. Pink

Last day I got quite allot of difference Amp level of my to batteries and i wondering if my parallel cables between the 2 breakers not doing the job as i should. Today i tested to close down the battery with most Amp to get more Amp on the one with less, but I see much less Amp on the parallel cables than I wold expect. I will try investigate this and try collect some more details on this. My setup use cables between the breakers instead of busbar. Pink

First month on solar completed. The whole month home was 100% run offgrid and produced 701Kwh. Im very happy with the level of power production even in cloudy days. Last days with much rainy weather I have been able to keep it going with good power management but last nigh not so this morning the ATS flipped at 06 or so. Then 2 hours later when battery voltage over over 50v it flipped back to solar power. So now that part of the system tested also. I use a external ATS from my inverters, I dont feed grid power to my inverters. I was happy to see my PC did not needed to restart when the ATS flipped. Pink

I was thinking same when i writed the reply. last week there was rainy/claudy days but still some sun at times and i was able to produce some power and even charge batteries. But right now im producing 0 watt. Im surprised how much power i can produce in a cloudy day without much sunny weather. If I had managed my power usage a bit better i guess I could manage a day or 2 more with my 2 x 280A (30kh) A funny thing i noted. I see my wife checking battery capacity on here phone and adjust usage after the capacity. Pink

Im on 30 days off grid since switched over, but now its raining and Im on 66% battery so lets see if I can "survive" this day and next before need to switch over to grid. I use ATS and expect to do the switching manually. I will save some battery for emergency if ever on grid and grid down in the bad weather. How much battery capacity you have? How many rainy days can you "survive" ? Pink

Any idea of the average watt usage of the 9000 BTU air con? Pink

Currently I measure 32 degree air temperature.. Goal is hat the machinery and circuits are cool enough. I guess temp will raise more with more routers pc equipment etc in the room. Pink

My 5m2 technical room have always been a cold room because no windows and how its built. After get 2 x Growatt inverters in there its getting quite hot in there so I consider to find a way to cool the room down in a way that make sense. Maybe some cooler direct from a dedicated solar panel? Pink

80 $au is quite allot of money to just be connected! Pink

Just keep grid as a backup option on a ATS. Pink

Good Point! Pink

I was surprised today to see that i got quite good level of solar power even in a light raining, cloudy day. At 14.15 my batteries was recharged, so Im exited how long i can keep running without my ATS kicking inn. Pink Pink

Get AC's with inverter, used less less power. Pink

Ok thanks for that info. My garage have grid supply so i just connect it there then to avoid any issues. Pink

Is there any reason to not run power greedy applications like a rice machine and power tools on solar power from hybrid inverter? Im getting 7k watt or so middle of day and our rice machine uses 3kw or so (4hp)? Pink

The EV will do the magic for your ROI and must be counted !!! Im "semi offgrid" I dont have any grid supply to my inverters but i do have a ATS with grid power so im very exited to see hoe much i can live without it kicking in with any grid power. I guess 2-3 rainy days... Pink

Yes you are correct in morning i use to see 55-65% remaining capacity. Last day i see 5W at 05.55. 08.xx I use to have more solar power than usage so charge start, then finish around lunchtime. I have set charge limit to 50A. Pink

I have very few days to refer too but charge current most of the time 20-30A. Charge time have been 4-6 hours. With latest settings there is very little or no balancing needed in the end today. Pink

I can only speak from my experience this days. With voltage 56v and before that 57v some of the cells picked up much faster on the higher voltage and then BMS got quite busy to try balance out that most by discharging. Pink

Done some small adjustments on JKBMS settings and reduced Growatt charge voltage to 55v and now it charge in a better way and very less volt difference between the cells. Pink

Thanks for the info, yes im on it researching. Pink