question

MarkHez avatar image

Blue Smart Charger 12/30 not Reconditioning

I've recently purchased the Blue Smart Charger 12/30, as due to the lack of sun at the moment my BlueSolarMPPT hasn't been able to bring the batteries (2x 6v 225ah flooded wired in series for 12v) in to float for 30 days.


I'm charging them on the high setting with recondition enabled, the charger us going up to 14.95v during absorb, which seems about right taking into account temperature compensation, but then when it gets to the recondition stage it drops the voltage to exactly 14.7v and just sits there for the hour, then goes into float. The main reason I bought this charger is for its ability to do a 16.2/16.5v charge, so I can't see what I'm doing wrong!


Any help would be appreciated.

Blue Smart Charger
1 comment
10 |3000 characters needed characters left characters exceeded

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

I am having same issues can see here never reaches 16v, i thought the idea of reconditioning would be for a battery that is less then perfect. this is after several attempts over a couple of days.

Your browser does not support HTML5 video.

20190703-121514.mp4 (10.3 MiB)
4 Answers
Mal avatar image
Mal answered ·

Your browser does not support HTML5 video.


Share
10 |3000 characters needed characters left characters exceeded

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Mal avatar image
Mal answered ·

Charger in recondition mode


Share
10 |3000 characters needed characters left characters exceeded

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Markus avatar image
Markus answered ·

To add: today, I did a recondition of a flattened out Excide 65Ah ordinary car batt.

The battery was accepting charge at high setting and Bulk was at 25 amps for up to 1 hour and ended after 1.5 hours.

Then, the charger left Absorption too early at 8 amps after 45min. and was not going to Recondition (stayed at 14.7) and switched to Float.

I had to restart the charger 4 times to get it into Recondition, even, when the current was down to 2.5A at the third attempt.

Do I have been to little patient and the charger does switching back to Absorption and then to Recondition on its own?

I don't think so.

The battery was outside the car and at room temperature.

It worked well, with the much larger (newer) batteries on the first time.

Regards,

Markus



1 comment Share
10 |3000 characters needed characters left characters exceeded

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

That's the exact situation I keep getting, but obviously on a much larger battery bank so it's near as damnit impossible to get it onto recondition (as tail current is higher) - I've ended up using a buck transformer set to 16.2v at 6a connected to a 19v PSU.

WKirby avatar image
WKirby answered ·

I'm really sorry, I was completely on the wrong track. I just automatically thought of solar stuff because that is what most people ask about. I deleted my previous answer because it bears no relevance.

Right, I'm now on the same page as you. :)
When the charger goes in to Recondition phase the maximum current that it outputs is 8% of 30A which is 2.4A. If the current required to sustain 14.95V during the Absorb phase was more than 2.4A then the Voltage will drop when the charger goes into Recondition.
Are you able to measure the actual current during Absorb?
With good batteries, the Absorb current should tail off to a very low level and then 2.4A would be able to push the Voltage up to 16.5V (on the High setting).

11 comments Share
10 |3000 characters needed characters left characters exceeded

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

That's a bugger, as it means I can't have any loads whatsoever on the boat whilst charging, I might have to try tricking it by connecting another charging source in parralel. Seems a lot of the issues could be sorted with a firmware change, as it is this charger really doesn't live up the expectations I had from my other victron gear! :(

After a full Absorb stage, 2.4A should be plenty to lift your bank up to 16.5V.

In order to diagnose if the charger is faulty or the bank is faulty, it'd be ideal to measure the Amps towards the end of the Absorb stage and then see if the charger is actually pushing out 2.4A when it hits Recondition.

The charger may well be doing its job and the battery bank is knackered. Only diagnostic measurements can tell.

My last lead-acid bank needed 25A just to hold float, then I knew it's time was up!

The issue will be me having loads applied that the charger is supplying whilst also charging the bank - running from a generator it's important to me to be able to equalise whilst also having the lights on or something similar. I'll try and sort something out! It was showing about 3a on absorption.

Ah, right. I don't think that the charger is anticipating loads. Fair enough.
That 3A Absorption you mention, is that with loads or sans loads?

With loads. I'm sat here in the dark now, absorption has just started and is running 3.1a no load. Hopefully it will drop before the end of absorption and kick in to a proper equalisation charge. My other option is to connect a 19v 7.1a switch mode transformer to the solar input on the MPPT and get that to do an equalisation, it appears from the FAQs that this should be safe, any chance you can confirm?

On a "normal" charge it's holding absorption at 14.62v 2.1a, hopefully this is enough to kick in equalisation at the end of absorption!

If the PV is disconnected before the connection of your "switch mode transformer" then you'll be fine. The MPPT will seek the finest power point and it won't know the difference. The thing with MPPT inputs is that the only thing one needs to worry about is not exceeding the maximum input Voltage.
I'm glad that you informed us of the presence of loads, I was beginning to get a bit concerned about the health of your battery bank.

Show more comments

I think this is, as it should be. It is unacceptable for the charger to do recondition, when additional load is connected. I believe, the way to go is, to do a manual equalization with your MPPT.

Yesterday, I did a recondition of 4 paralleled 90Ah AGM batteries, with no problems.

Regards,

Markus

12/30 in recondition mode amps and voltage, never got near 16v for equalisation have charged and left on float several times .SG still not balanced across all cells battery around 24 mnths in boat normally. Hope video works seems a bit contradictory that you want to use recondition on a battery that needs it yet charger needs a good condition fully charged battery to equalise within the set limits?

20190703-121514.jpg (62.0 KiB)

Your browser does not support HTML5 video.

20190703-121514.mp4 (10.3 MiB)