Hallo
instalation:
2x 48/5000VA multiplus in parallel
CCGX, ESS
BMV702
MPPT250/100,MPPT150/70
600Ah traction batt
I have got problem with charging.
Multiplus, BMV and MPPT has setup absorption 56,6V , but absorption charging to 58V. It doesn't matter charging from AC multiplus or MPPT.
I did restar ccgx. I did double check setup all multiplus, BMV, MPPT everywhere is absorption56.6V, float 55.5V
Any advice?
thx
ross
Hi @ros
Temperature Compensation setting? That's what it will do with cold batteries. And the other way when hot. 25 degC is the start point.
Where are you seeing this? If a max reported over a day, then could be just a spike. A screenshot showing a stable Absorb V would be good.
Are you using DVCC, and if so, where is it sourcing V?
You say it's regardless of charger, but this suggests it's not at the individual chargers, but something common to both.
Hi,
i have got lead acid battery.
Yes, actually DVCC is ON.
I overlooked that you're using ESS, so under DVCC the mppt(s) should be using the settings from the Multi, not it's own. The V should be from the BMV.
I don't know how you check the Multi settings, but I'd download a fresh file and take a good look over it. Especially temp comp.
The graph appears to be from the BMV, showing a Multi charging. And if you don't mind me saying so, perhaps for too long in Absorb, going by the Tail current for 600Ah of batts.
I think the key place to look is the Multi settings. You probably should be using temp comp anyway, but if you're worried that the Abs is too high then just lower the setting to compensate. I've never actually come across the need to do this, so I hate saying that because there is likely an 'unseen' reason for it.
