Victron 700BMV

[sailaboutvic]

It won't, it can't, because the voltage would have to exceed 14.1v, and simulatneously the current would need to be less than 2% of 450ah, for 3 mins.

Your voltage won't exceed 14.1v on float.

Thanks Paul , that answer that one .

 

[pvb]

Thanks Paul , that answer that one .

That's the answer I gave in post 2...

 

[GHA]

And another look with the charger back on. Monitor shows 93% SOC.
Charger set to 13.6V first, quickly backs off to about 6.6A going in. Or a fraction under 3% in A of 225Ah capacity.

4% tail current at float is *not* fully charged.

Then charger switched to 14.8v, current ramps up to about 17A, 20A charger full wack minus house loads.

IMHO 2% @ 14.8v is still a little high to tell if you're at 100%, buts that's to do with actually getting the batteries fully charged on solar, not resetting the battery monitor.

 

[pvb]

It's possible to reset the monitor manually too.

 

[sailaboutvic]

Pvb thanks for your contribution.

I was hoping
When I started this thread someone would had said there have the same set up and pass me their figures, its not happen , too much to ask for

Just so everyone who trying to help know where I am with this .

I has managed to sync it earlier to day using my solar panels and shore power with the setting I posted earlier , but not managed to do it again .
After Paul explanation why It wouldn't work ,

I Discharging the batteries below 20% I then tried to get it to re sync, after a few hours the mppt entered Abs and a while later into float but the BMV never got as far to re sync , some hours later it still never got there but the mppt still stayed on float .
I would had through as the mppt entered float the batteries had to be fully charge
Correct??????
and if you believe the Manual it should had auto sync itself .

So I guessing there still a problem with the setting .

Pvb is correct I could just sync it my self but then I wouldn't be sure that the batteries are fully charge . And the BMV is set correctly .

The Photo is 40 mins after all charging where turned off .
As you see it's still state 100% soc and it's used 3Ah
To me the figures don't add up .
Current being used 3.5A and at that rate there 3 days and 22 hour ( 94 hours) remaining before all the Ah gone ( I except I can only use max 50% of the Ah )
3.5x94=329plus the 3 it's used that's 332 , that 118ah out .
That doesn't add up , unless I am over thinking this .
I except it's not going to be 100% correct but 118 is quite a bit out .

 

[PaulRainbow]

Pvb thanks for your contribution.

I was hoping
When I started this thread someone would had said there have the same set up and pass me their figures, its not happen , too much to ask for

Someone did.

 

[sailaboutvic]

Someone did.

Tried some of your setting to day , going use the rest to morrow .

 

[GHA]

I Discharging the batteries below 20% I then tried to get it to re sync, after a few hours the mppt entered Abs and a while later into float but the BMV never got as far to re sync , some hours later it still never got there but the mppt still stayed on float .
I would had through as the mppt entered float the batteries had to be fully charge
Correct??????.

Not correct, takes a long time to fully charge and the default bluesolar settings very likely switch to float far too early so the monitor sounds correct, the batteries arent getting fully charged. Don't have the bluesolar software set up at the moment but from memory the only way i could get round this was to set float voltage the same as absorption and even then 300w of solar struggled to get 225ah to full with clear blue skys. Not the sort of thing to do if you're not living aboard to keep an eye on things though.

 

[sailaboutvic]

Not correct, takes a long time to fully charge and the default bluesolar settings very likely switch to float far too early so the monitor sounds correct, the batteries arent getting fully charged. Don't have the bluesolar software set up at the moment but from memory the only way i could get round this was to set float voltage the same as absorption and even then 300w of solar struggled to get 225ah to full with clear blue skys. Not the sort of thing to do if you're not living aboard to keep an eye on things though.

Did explain that good . Both shore power and solar where on at the time when the mppt went onto abs then float , in other work the batteries was getting charged two ways .
Another good sunny day to day so I give it another go , will discharge to 80% and see if they will sync , using different setting .

Question to the panel .
my calculations in #25 are they about right, or would there Be that much of difference in time to discharge if the amount of current stayed the same ?

 

[GHA]

Did explain that good . Both shore power and solar where on at the time when the mppt went onto abs then float , in other work the batteries was getting charged two ways .
Another good sunny day to day so I give it another go , will discharge to 80% and see if they will sync , using different setting .

Did the mains charger go into float as well? Maybe it went to float before the current went below 2% so the monitor is doing what it's told. Usually not so much of a problem with a mains charger as it will carry on pumping out some current all night but with solar going to float too early it can trash your batteries by never fully charging them.You could maybe set the MPPT float to a little above the monitor charged voltage just to see that the monitor will reset.