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Bryan1

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Joined: 22/02/2006
Location: Australia
Posts: 1576

Posted: 03:45am 06 Oct 2025

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Well while I was grinding some 1.5mm gal plate for the back cover heard a bang and found some black plastic close to my foot, couldn't see what it was so just kept going and the sparks were no near the battery either.

Just did a voltage check and the battery is still holding voltage so that is a good sign

Now there is another battery where the lid is raised and I can't really complain as I did get this battery free back in 2012

Now I do think with this build some Ceil 1000AH cells may be needed to replace this battery. I will stay on 24 volts too as can't see the justification of spending all that money just to go on 48 volts.
Edited 2025-10-06 13:47 by Bryan1

rogerdw
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Joined: 22/10/2019
Location: Australia
Posts: 935

Posted: 09:46pm 06 Oct 2025

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That's a bit nasty Bryan and I'm glad they didn't all go off.

I'm in a facebook group of forklift battery users and one of the guys had his blow up ... and he successfully stuck them all back together again using hot glue. Some were cracked down the sides and glue even sealed them too.

Also a reminder for me to not be too casual around mine. I keep a fan running over them while they are charging but I also need to be aware of not creating sparks with charging leads etc.

Cheers, Roger

Bryan1

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Joined: 22/02/2006
Location: Australia
Posts: 1576

Posted: 06:53am 10 Oct 2025

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Well good news on my shed battery as that cell that blew it's lid is still good and the batteries are fully charged for the weekend

Cut some 6mm perspex today at work for clamping ontop of the heatsinks and in the morning I go to the 12 volt shop and get more cable and a 175 amp anderson connector so a bit more work can be done. Cleaned up the box last weekend and gave the inside a coat of white paint to clean the box up.

Pic's will come later this weekend

Regards Bryan

Bryan1

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Joined: 22/02/2006
Location: Australia
Posts: 1576

Posted: 07:18am 14 Oct 2025

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Well had a look at Ali tracking and it still said 7 days on the weekend before they get off their butt and sending the package

Just checked now and it says 2 days before shipping.

Anyway installed a din rail and got onto ebay and bought a energy meter the same as Rogers

so for the AC output I will put in some circuit breakers along with that energy meter so got a visual of whats going on.

As the brain board still needed the nano soldered in got it all setup tonight and hoping if all goes well tomorrow got 60+ soldering joints to do, ain't soldered circuit boards in ages so time to get back in the swing I think.

Now for the main driver board I did find some old brackets to fit the job

so by using the outer holes on the circuit board will allow the the battery connections to pass under between the gap and just need to bend up some plate to mount them.

Now I did buy a 450 amp DC isolator ages ago so I'm thinking as inverter box is so close to the batteries of getting a second one so both the DC wires can go via the on/off switch's doing away with the Anderson connector idea.

Now as Keepis did say when those toroids finally did ship they were at his door before he knew it

so time to get moving on this project.

Regards Bryan

Bryan1

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Joined: 22/02/2006
Location: Australia
Posts: 1576

Posted: 07:19am 17 Oct 2025

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Well just checked ali and and my toroids have finally shipped

also got that energy meter today so got question for Roger did you setup the wifi for this energy meter as the destruction's do give a guide on how to set it up.

Also bent up the supports for the main board at work today and talked the boss at work to let me work tomorrow as the time line is getting shorter before the next audit so it does look like I may be working a 6 day week may be on for the next month or longer.

So I have lost the window to get the thick cable this weekend so I can get it on the way home from work on Monday.

I do have a good picture in my head how this is going to be setup but before any power is turned on plenty of pic's and a keen eye from the experts will be needed as I will also be hooking up this Goodwe 5kw gridtie as those 6 off 190 watt panels according to my victron 100/50 isn't getting the shed battery to float but on checking the SG tells a different story where the SG meter is sitting in the green. I do have a second voltage controller relay and can liberate the 35 amp relay from the house project that has stalled as the 1.9Kw array has the batteries on float around lunch time.

Now on saying this watch the season change and the 2.4Kw split system on the house will be needed so my wife can stay cool thru the day so that SunnyBoy Gridtie project will be needed to be completed for the house array.

Regards Bryan

Godoh
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Joined: 26/09/2020
Location: Australia
Posts: 575

Posted: 08:19am 17 Oct 2025

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Hi Bryan, just wondering if you have the Victron controller set to the right battery type.
I have some 50 amp victron controllers in my system , from memory they have a rotary switch to set the battery type.
If the controller is set to the wrong battery type then that may explain why it thinks they are ready for floating.
Pete

Bryan1

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Joined: 22/02/2006
Location: Australia
Posts: 1576

Posted: 09:02am 17 Oct 2025

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Pete with my Victron MPPT's they are all bluetooth controlled and I have set the voltage to 29.2 for float and looking at history the battery voltage just never got there.

now I have left the shed going so my beers stay cool

and with close to 4Kw input the batteries are getting to 28.88 volts but the SG does tell a different story.

when I got these batteries back in '12 my mate did say 1024 SG was the fully charged point, now on looking today they are sitting close to 1030 and looking at that battery that lost it's top not my bubbles are being produced.

anyway I am working tomorrow so when I do get to my shed I may see a different story as the MTTP may well be in float and the current off the shed is enough to keep the voltage down

mab1
Senior Member

Joined: 10/02/2015
Location: United Kingdom
Posts: 256

Posted: 05:44pm 17 Oct 2025

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29.2v seems a bit high for float to me:-

I'd be setting 27.6 for float, 28.4 to 28.8 for absorb, and 29.2 for equalisation.

Unless it's very cold where you are, I'd guess you must get through a lot of deionised water.

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