Blue Smart IP22 30A Charger - Minimum 1 hour Absorption Time ?

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Nev asked May 27, '20

Blue Smart IP22 30A Charger - Minimum 1 hour Absorption Time ?

The latest versions of the VictronConnect app now allows a multitude of settings via Bluetooth. Thank you.

I note that the minimum absorption time unless I have missed a setting is still restricted to 60 minutes minimum. Is this a firmware limitation or could it be reduced via a software update?

I use this charger with a 4 cell 300Ah LiFePO4 battery and have my Victron MPPT controller set to just 1 minute at 14.2V for the last 6 years of daily use. The battery has usually reached 100% SOC at that point.

The 1 hour minimum absorption period on this charger is just a little concerning and unecessary for our setup.

Neville

Bluetooth

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Answer 1 · 2020-05-28T12:52:22Z

Guy Stewart (Victron Community Manager) answered · May 28, 2020 at 12:52 PM

Hi @Scubadoo,

Using the demo for the IP22 Blue Smart 30A charger, in Settings, Custom Charge Preset -> Advanced battery settings -> User defined -> Expert mode. I was able to set an absorption time of 1 minute.

Where did you find the limitation to 60 minutes?

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Answer 2 · 2020-05-28T17:48:37Z

mondeoman answered · May 28, 2020 at 05:48 PM

I just tested the latest firmware on a Blue Smart IP65 12V / 10A.

The new features are great. The "digitally programmable" Power Supply mode is very useful around the shop.

However, it does not allow me to set Absorption Duration to less than 1 hour.

If you set it to anything less than 1h, when you press Ok, it automatically upgrades to 1h.

Slightly disappointed.

At C rates below 0.1C (e.g. a 10A charger on a 100 Ah battery), LiFePo4 batteries are already > 90% charged when reaching the Abs voltage. An additional 1 hour absorption may take you into overcharge territory. I could lower the Abs voltage and compensate with a 1 hr Absorption, but that increases the charging time.

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marco-merchioni commented · Sep 14, 2021 at 05:25 PM

Hi mondeoman, I have the same problem with my Orion DC-DC charger, with te same C rate (30A-300Ah). How did you calculate the compensation Abs voltage/1h Absorption?

Thank you

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Answer 3 · 2020-05-28T21:30:29Z

Nev answered · May 28, 2020 at 09:30 PM

Hi Guy

Using the setting in real mode. I have not tried the simulator mode yet.

Although I can adjust the "Maximum absorption time" setting to 1 minute or any number less than 1 hour with the slider it is not accepted when entering OK and always reverts back to 1 hour.

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Answer 4 · 2020-05-28T23:36:35Z

Guy Stewart (Victron Community Manager) answered · May 28, 2020 at 11:36 PM

Thanks both,

It seems there is not a quick fix for this, the absorption time is indeed limited to 1 hour minimum. For now unfortunately you will have to work around it as best as you can.

Perhaps in the future the configuration options will be expanded further.

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Answer 5 · 2021-09-14T17:18:12Z

marco-merchioni answered · Sep 14, 2021 at 05:18 PM

I have the same problem with my Orion 30A DC-DC Charger. I was thinking about buying a Blue Smart 30A, but really,I think at this point, I will wait for a solution or I wish to reconsider my choice.

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