Quattro, Cerbo GX, and Touchscreen 50 just installed and turned on with default settings (storage voltage 26.4). After bulk and absorption, bank of 5 pair of Lifeline AGM’s settled into float/storage voltage of 26.4v as reported on the Touchscreen.
When house voltage showed 26.0, I began to check. Using two portable voltmeters, one a Fluke), I obtained 26.0+/- 0.05v at three locations (main house busbar, B+ and B- leads connecting to Quattro, and across the pair of AGM’s with the Quattro voltage sensing cable connected to the B- post of the AGM’s. House voltage steady at 26.0 +/- 0.1v, an independent Blue Sea house bank battery monitor shows steady 26.0 +/- 0.4v.
I believe Quattro is holding voltage at a precise, but inaccurately reported value.
Manual says float and storage voltage is not adjustable with DIP switches. Connecting through VEConnect and using VEConfigure, I am able to adjust bulk and absorption voltage, but can’t find a way to adjust float and storage voltage?
26.0v is below LIfeline guidane for float/storage. Can I adjust Quattro, say to target 26.8v, which would really be the 26.4v I need? Would a battery monitor “wake up” the Quattro so that the voltage calibration became not just precise, but accurate as well?
Guidance would be appreciated.
As you have a Cerbo GX you can do this via VRM (Victron Remote Management) over the internet and a laptop/PC. If you have a mk3 to USB dongle you can do it directly using VE Configure on a laptop/PC or VEictronConnect app on a smartphone.
I have used both of the tools you recommend.
I am able to change bulk and absorption voltage.
I find no menu or dropdown box related to float or storage voltage.
Can you please describe in detail where you have found this.
Thank you.
As far as I am aware and all my work with VE Bus settings, you do not have bulk and absorption voltages, bulk does not have a voltage setting because the charger is giving max current until it reaches the absorption voltage, which does have a setting, as does float. Storage does not have a setting, this is 13.2V for a 12V battery, so for you, 26.4V. This is just above 100% charged voltage and results in very little current passing through the battery. See screenshots below from VictronConnect and VE Configure.
That is helpful and confirms the menus i was able to access. I misspoke, as you confirmed access is available and I was able to change absorption and float voltage, but not storage voltage.
My problem is Cerbo GX reports storage at 26.4, and 26.4 reports via VE connect and Touch 50, yet I have multiple other measurements showing actual voltage is 26.0 +/- 0.05v. Two different multimeters, one a Fluke, report 26.0 +- 0.05v at main house battery busbar, B+ B- terminal blocks on Quattro, and B- terminal on AGM battery pair connected to voltage sensing cable from Quattro. And house voltage in pilothousr reads 26.0, as does an independent Blue Sea house battery monitor.
So if I cant step uo the storage voltage, and I believe Quattro is holding precisely buy 0.4v low, I am risking while battery bank by not holding Lifeline AGM criteria of 26.4?
There are odd reports at times of equipment with odd voltages. All I can suggest is contacting your dealer to see what they suggest. I do not think that there is anything user configurable to solve this.
Some thoughts that may be work arounds, not solutions.
Try connecting the V sense wires to the battery. I do not know if these use a second voltmeter rather than the one on the dc input terminals.
Disable storage and workaround with just float. Not ideal with expensive batteries like Lifeline.
Add a SmartShunt to the system, I can not recall cases with these showing incorrect voltage and then use DVCC on the Cerbo GX to share the SmartShunt voltage with the Quattro. Yes, I know, why pay for another product to make up for an issue. As I said, it is a workaround.
@porter On another thread here on Voltage Sense, it is stated that the voltage sensor is the same for both the main DC terminals and the voltage sense wire, so point 1 above will probably not be any help.
Thanks for that. Through my dealer, I have been trying to get confirmation of V-sense voltmeter and the Shunt-DVCC workaround from Victron but have no feedback yet.
