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AGM's replaced by LiFePo4's
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coriolis2 View Drop Down
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Points: 301 		Post Options Post Options   Thanks (0) Thanks(0)   Quote coriolis2 Quote  Post ReplyReply Direct Link To This Post Topic: AGM's replaced by LiFePo4's
    Posted: 23 July 2021 at 18:14
Hi all, decided to replace the 3rd set of 2 115Ah AGM's wit 400Ah LiFePo's. Sourced the 3.2V cells in Poland, the BMS's and battery monitor/coulomb meter by AliExpress, the 2kW pure sinus inverter also in Poland and other small pieces locally.
The whole set fits exactly in the GRP hold under the bench. Combined with 2x 50W, 2x 30W and 2x 110W PV's I'd put my shorepower cable far far awaySmile











Edited by coriolis2 - 05 December 2024 at 11:08
"Coriolis" H350 #045 (ex Waarschip 570 #? 1987/1992, ex Waarschip 28LD #7 1994/2007)
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Forth2 View Drop Down
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Points: 77 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Forth2 Quote  Post ReplyReply Direct Link To This Post Posted: 23 July 2021 at 19:08
Really neat installation.
Micke
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350Bob View Drop Down
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Points: 184 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 350Bob Quote  Post ReplyReply Direct Link To This Post Posted: 09 August 2021 at 11:01
Hi, I agree a very neat battery installation, but I was also impressed by your calibration of the fuel gauge shown on the photo of your switch panel. Can I ask is this based a a physical check as you refilled the tank?
Not that I have ever let it get that low but scary to think there is only 10 litres left when you hit the red! Did you also note the actual contents of the tank when it was full?

Many thanks

Bob
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coriolis2 View Drop Down
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Points: 301 		Post Options Post Options   Thanks (0) Thanks(0)   Quote coriolis2 Quote  Post ReplyReply Direct Link To This Post Posted: 10 August 2021 at 11:22
Hi Bob, yes, last autumn I almost 'drove' the tank empty and drained the remaining diesel, I cleaned the tank and filled it up with 5l at a time watching the gauge. I only use Neste My or as a 2nd choice GTL, both HVO fuel with 0 chance of bio fouling.
I didn't check 100% though...


Edited by coriolis2 - 05 December 2024 at 11:10
"Coriolis" H350 #045 (ex Waarschip 570 #? 1987/1992, ex Waarschip 28LD #7 1994/2007)
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350Bob View Drop Down
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Points: 184 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 350Bob Quote  Post ReplyReply Direct Link To This Post Posted: 10 August 2021 at 14:58
Hi, thanks for the reply the calibration certainly makes more sense of the tank readings than 20/40/60/80/100%. I am afraid sailing in Greece we don’t yet have the fuel choice that you have, I just treat each fill with an additive.

Bob
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Käpt´n Nuß View Drop Down
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Points: 15 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Käpt´n Nuß Quote  Post ReplyReply Direct Link To This Post Posted: 18 August 2021 at 07:39
Hi Coriolis,

did you measure the temperature of the generator?

I installed a set of 280 Ah LiFePo4.

Now the generator is heating up until more than 130°C!

As I expected this issue, so I installed the sterling A2B charger. It should cut off charging when the generator exceeds 90°C.

A request at the sterling support said: The A2B charger works properly, but it can not cut off the charging as long as the regulator of the generater itself works.

So I think the A2B charger ist useless and the only option to keep the generator alive is an external regulator, that keeps the charging current in a reasonable limit.

That results in a max of 60 Amps on the 115 A Mitsubishi generator. Cry
As the generators are developed for automotive use, they ar not able to charge with high output for longer terms.

Before I realized that, I hoped to get the Lithiums charged by generator in a very short time.

How did you manage the heat problem on your generator?

Thanks
Thomas






Edited by Käpt´n Nuß - 18 August 2021 at 07:42
SY Yggdrasil Wackerballig
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Points: 17 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Persephone Quote  Post ReplyReply Direct Link To This Post Posted: 18 August 2021 at 11:36
I recommend you look at the VRC-200 from nordkyndesign.com. It works very well with the Mitsubishi 115 A alternator.
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coriolis2 View Drop Down
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Points: 301 		Post Options Post Options   Thanks (0) Thanks(0)   Quote coriolis2 Quote  Post ReplyReply Direct Link To This Post Posted: 18 August 2021 at 13:59
Hi Thomas, I managed this issue by not connecting the generator at all Wink

But I was aware of this issue and I'm waiting for a Votronic B2B Charging Converter (VCC 1212-30) with a max output of 30 Amps (plus a circuit breaker!). However, the solar panels are keeping up the work and I'm using my electrical (2kW) water cooker and charging our two Fiido electrical foulding bikes every day during (long)weekend trips. In between the solars are topping up the batteries again.

The 400Ah battery with 260Wp solar was designed to keep the power up during longhaul 24-7 (solo) sailing trips. In that case I won't use the electrical water cooker but a JetBoil cooker for freeze dried food and tea. No cooler, No electrical steering but a windvane, but all navigition equipment running (instruments/plotter/radar/active radar antenna/AIS/VHF/(LED)nav lights).

Best regards, Rob


Edited by coriolis2 - 22 August 2021 at 10:47
"Coriolis" H350 #045 (ex Waarschip 570 #? 1987/1992, ex Waarschip 28LD #7 1994/2007)
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Käpt´n Nuß View Drop Down
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Points: 15 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Käpt´n Nuß Quote  Post ReplyReply Direct Link To This Post Posted: 18 August 2021 at 15:01
Very impressive! And a consequent solution.

Thank you.

Thomas
SY Yggdrasil Wackerballig
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H8jer View Drop Down
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Points: 1503 		Post Options Post Options   Thanks (0) Thanks(0)   Quote H8jer Quote  Post ReplyReply Direct Link To This Post Posted: 18 August 2021 at 18:56
Originally posted by Käpt´n Nuß Käpt´n Nuß wrote:

Now the generator is heating up until more than 130°C!

As I expected this issue, so I installed the sterling A2B charger. It should cut off charging when the generator exceeds 90°C.

A request at the sterling support said: The A2B charger works properly, but it can not cut off the charging as long as the regulator of the generater itself works.

So I think the A2B charger ist useless and the only option to keep the generator alive is an external regulator, that keeps the charging current in a reasonable limit.

That results in a max of 60 Amps on the 115 A Mitsubishi generator. Cry
As the generators are developed for automotive use, they ar not able to charge with high output for longer terms.

How did you manage the heat problem on your generator?

Thanks
Thomas

Hi Thomas. 
My Sterling AB130 has a tempsensor. But it needs to be placed correctly. 
See this thread for troubleshooting.
https://myhanse.com/lifepo4-batteries_topic11944_post106304.html#106304
Hanse 370#487 30HP 3-cabin
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