This site is now in read-only archive mode. Please move all discussion, and create a new account at the new Victron Community site.
VEConfig wont allow me to adjust the value of "DC input low restart" to below 21.8.
I can properly set values of "DC input low shut-down" & "DC input low pre-alarm" to 19V, which is what my lithium battery is rated for, but with the "DC input low restart" value fixed at 21.8 or above, this prohibits me from turning on the inverter unless the battery is 50% SOC or above.
Anything I'm missing here?
Thanks
For most battery types that are expected to be used this is a very low value. It is most unusual to ever venture to this low end of this setting.
I might be wrong, but It seems like you are using 3.7V cells in a 6S configuration. Most of the 24V "Power Wall" people run these cells 7S to overcome these compatability issues.
I am using a Tesla model S 24V 250ah battery. 19V is stated to be around 20% SOC, 25V is 100% SOC.
Ideally I would have all 3 of these values (shut down, restart, pre-alarm) set around 19V, when I took the picture I was trying to see if I could get the "low restart" value to drop if I dropped the other values..
Could we please implement a workaround for this? I need absolutely need to be able to turn on the inverter at 19.5V.
I am having the same problem. I have the same battery but a multi plus inverter. How do we contact in the United States for technical support? Please Let me know if you find a way around this.
Heya Brock, thank you for chiming in. I agree that the "DC low input restart" should be customizable below 21.8V. If Victron did not want the inverter being run at values below 21.8V, then it should clearly be imposing this minimum voltage on the "DC low input shut down" parameter, not the "restart" parameter. Also I agree with you that there is a software problem considering that the "restart value" should not be affecting anything until the voltage has first dropped below the "shut down" value.
Ideally we would customize and add a 250aH 3.2V cell in series to our model S battery to get the overall voltage higher, but this is not preferred. Option #2 is to add a second battery in parallel so that the higher capacity makes this far less of a daily problem.
I think we are kind of SOL unless Victron makes this "restart" parameter more customizable. Technical support is only granted through your "Victron Dealer", which for me is the internet store, thus, no help.
Thanks for your reply
Wow wish I would have looked into the tech support before I bought this inverter. I never would have guessed we can get no support without going to a dealer. Tom Morton (Mortons on the move) (solar-phase-3-the-inverter) the same setup as us and I wonder if he is having the same problem. I will be leaving some reviews around. this should be known to new potential buyers. Victrons website says 19-33 Vdc Nothing about voltage must over 21.8v to turn on inverter.
Like Peter said, most inverters (Mastervolt, Schneider, Magnasine, MPP etc.) have this limitation, it is a physical hardware limitation of power electronics. Startup involves higher inrush currents and so the startup Voltage must be higher than a running Voltage. Also, startup means startup from any state, whether that's from an automatic undervoltage (<19V) event or by the user switching it on. The machine needs to start up either way.
This is the scenariio for my MultiPlus 24/3000/70 - 230V version.
If I set DC Low Shutdown to 19V, then my lowest DC Low Restart minimum is 21V.
If I set my DC Low Shutdown to 18.6V, then my lowest DC Low Restart minimum is now 20.6V
If your limits are different then you can see that the lower limits are dictated by the capabilities of the hardware, they are there for a reason and are not by some whimsical frivolity.
