Pink7

I may miswrite my initial post a bit? I tried to discuss placement of the lugs for BMS wires going to each positive pole. I see some prefer to place them on the bars connecting the batteries not on the pole itself. Pink

Good idea with spring washer.. On all batteries or only main + and main -? Pink

Just did some very simple testing on my LiFePo4 battery with BMS lug on the battery pole and i got a feeling that i get better tightening without the BMS lug? So whats your experiences and opinions: BMS lug on battery pole or use its own hole and bolt? Pink

I have it. I would not buy hydraulic again. I have open it many times becouse it stoped to work then until now been lucky to be able to use it. Buy the type Crossy just post. Much longer life. Pink

Yea that would be a dream 555 Pink

Sorry my main is to much busy with other things now. That was wrong info. Pls check the link i added. I payed $110 or so per battery. I payed $4050 all included. Pink

I agree 100%, I did buy expensive lugs to get good and much material so reason to not replace them is mainly because I dont see a way to remove current lugs and ad others in a good way without creating other problems. I guess my solution is either drill new holes or ad material between the battery and the lug, then with a extra smaller hole for bms cable. Pink

Thanks for all info and help Crossy. I guess even after drilling new holes i have more materiel left on the lugs than those have and the fact that i just noticed diameter of the small bms lugs are just smaller than the hole on the better lugs so i will try drilling new 6mm holes on the battery lugs. Pink

Battery cable 35mm2 - battery stud 6mm i think Regarding" You only need a smear of the joint stuff on the mating faces but it does set after a while, still easy to take apart." Fill any gaps or only use on surfaces? Pink

I was not able to find a good quality battery connectors for large diameter cable with 6mm hole. Im my limited experience the hole sizes goes up with the dimension for the cable. Even me dont like so much gap between the stud and the hole. I could drill another hole but then its way less material left and the nut need it its space too. I will give it some more thinking. Pink

I have buy the electrical joint compound already. After apply will it be hard? Im planing for max of 60-80 Amp on each battery. Pink

If I cut some pieces of the extra bars who i got with the batteries with a exact drilled hole and place between the pole and connector as a washer will that be a ok solution? Any disadvantages? Pink

I have been thinking of this too.... Just drill a new smaller hole. Its enough pace for it. Pink

yes correct. Pink

Its still a bit early for me so i had to re read this to get the BMS connector part. Bms connector size is near perfect on the battery terminal. As long as you mean the terminal for the thin bms wire? Pink

If I understand what you ask correctly, the terminal is on top of the shoulder but only a small part of it. Could you explain : "modify one of the inter-cell strips with exact size holes and fasteners." Pink

I consider cut some pieces of the extra bars who i get with the batteries with a exact drilled hole and place between the pole and connector as a washer. Pink

So now its time to get the batteries and JK BMS mounted together. I think I have a quite small contact area between battery connector an the battery pole. Any thoughts on this? Pink

Yes its 280Ah Pink

Parallel cables and Wifi just added... Pink

So today i have done more testing and with real sun conditions ( yesterday testing was just as sun was going down) Both inverter DC270+ in and AC 230 out with only solar connected ( no battery yet and no AC in) So all good !!! Pink

This afternoon solar was connected to my 2 x Growatt inverters. I checked the dc power (DC 250 each) and powered it on. Im not sure if Growatt SPF500ES really can do battery-less because i connected a wire to Ac out breaker on the one inverter and there was no AC Power. Tomorrow i will try the other one when have sun again. When i turn the switch to power it up first time it did not start because i forgot to open DC breaker with solar power. Its not to much work left now then it should hopefully be ready. Pink

More experienced than skilled. So i was thinking of join the wires together with some soldering. I will be ok but i know it could be done more beautiful than i do. Usually i will twin the wires together and fold the joint then solder it then shrink tube. In this case might not fold it, just twin together and wire. Pink

4 of my wires to BMS is a bit short to reach the batteries in bottom of my build. Extend the needed 4 wires or get a JST extension for the whole set of wires? Pink

And then the tool decide to be working again..After try taking it apart and back again. Pink