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We have a problem with brand new Victron SmartSolar MPPT 100/15.
After a night, when new day powering solar panels and Victron SmartSolar
-the SmartSolar is NOT reaching Float Voltage setting. We have to unplug
battery and solar panel – to brigh it back (Float voltage). Why?
Is there any software bug? or We have a broken SmartSolar?
We have a Firmware 1.50
How many panels? Battery voltage? How are panels connected? Panel VOC? System voltage? Battery type and profile used? You are aware that to start, voltage has to be vbat +5?
Two panels, voltage about 70-80V, battery 24V (27,6V), "user defined" battery preset to: Absorption 28,5V, Float: 28V.
It works good....to the night. When new day is powering on Victron charger, the SmartSolar is charging battery: Bulk, Absorption and Float.... with voltage below the Float voltage setting. Why?
In MPPT settings, what is your load output "operation mode" set to?
I have the 100/15 and found playing with different settings in here (especially changing to "battery life" or changing here to custom user modes) changed some other parameters -like my absorption time and lengths and when and how it went into float mode if at all!
So this might be where a float voltage issue could be?
Also when I joined my bmv712 via VEsmart network the MPPT started using the bmv712 values to change when it did things and because my bmv712 was not set up correctly that messed the MPPT up and changed absorb and float times and voltages that I saw. So maybe if part of a network remove it while solving float voltage problem.
Also 70-80v each or together in MPPT reading?
If batteries are overcharged will they still reach wanted float voltage?
Does problem with float voltage happen when no load on system for that day?
What did it screw up / what did you change in the BMV to not interfere with the MPPT? In all my reading the MPPT is a standalone thing even paired with a BMV. Voltage over smart network still seems like more trouble than it's worth.
If I show 13.33v on the SmartSolar (charging at say..14 amps), the BMV will show 13.52 (yes paired over smart network, left/rejoined/recreated/many fw updates/over a year of this mystery, temp compensation OFF). If I leave the network on the MPPT it'll show 13.6v. If I rejoin the network the MPPT will slowly taper down to 13.33v again over about a minute. Wherever it's getting that voltage from beats me, everything is closer to the BMV's reading measured anywhere in this compact system. I just went from 14ga to 10ga for MPPT->Battery and there was zero change. My thought was that the BMV reading and MPPT reading was skewed from small wire, too much for it to calculate, so it goes wonky at 13.33v. But yeah, no improvement with 10 gauge (8" wire runs)
TL;DR if there's some magical setting in the BMV that makes this work as intended, let me know. Right now I have absorption set to 13.70v on the SmartSolar and reach 13.8-13.83v daily, on the smartnetwork. I have no idea why some days it goes over. It'd sure be nice to program the SmartSolar absorption to 13.8 and know that it'll cut when the BMV reads 13.8. You know, how everyone assumes these things are supposed to work. I've spent a lot of time camped out with BMV on one screen, SmartSolar on another, watching what happens at the very end to try and hit 13.8 on the nose. I now have all of this logging with a smart BMS just because there was no trusting the MPPT/Smart Network voltage
No none could help me at this forum?, so - where should I ask about it? Is there any Victron support contact possibility?
What charging state do the leds on the mppt indicate?
Do the batteries reach the bulk/absorb setting?
Got to give us some system specs or screen shots of your settings and battery page tabs.
Without this,
If you are not getting into float consistently are you certain your batteries are still good?
For 1 day they might seem good but need to have everything be "reset" by unplugging everything and redoing it to appear good again a day later. So that's one possible problem.
The victron techs are not on here except 1x or 2x a week so you might have to wait a few days more for a direct response. Sharing specific details also will help the community help you find an answer possibly quicker.
Hi what batteries are you using. Because 28V float is very high for a 24V system.
