Author Topic: Adjusting the Day Light Nite Light sensitivity  (Read 1636 times)

tomartig

  • Newby
  • *
  • Posts: 1
Adjusting the Day Light Nite Light sensitivity
« on: January 31, 2022, 05:41:57 PM »
Hello,

Newbie here.  I have a Classic 200 and want to use the daylight function on Aux 1 to turn my inverter on and off so I can power some loads during daylight hours with solar but switch them back to shore power in the evening.  The problem I have is the daylight mode is set to go low when the PV voltage falls below the battery voltage.  My battery voltage is 12 volts and my PV volts is around 100 volts.  I have 6 250 watt panels wired up in 2 sets of 3.  The problem is that my PV voltage doesn't drop that low until its almost totally dark and it has been hours since I have had enough watts to run my load.  I found one reference to a place to adjust the sensitivity at Modbus Address 4159 and it looked like a memory location to put a value in that is added to the battery voltage.  I am not familiar with how to modify these values. I am running Classic Status 4 Plus and downloaded his utility to read Modbus locations but I am not sure how to write to them.  This value is not under his classic settings tab.  Any suggestions would be appreciated.

ClassicCrazy

  • Hero Member
  • *****
  • Posts: 3344
Re: Adjusting the Day Light Nite Light sensitivity
« Reply #1 on: January 31, 2022, 06:09:12 PM »
Have you thought of using other aux functions to turn your inverter on and off ?
If you have a Whizbang you could think about trying SOC % . With SOC control you know your batteries will never be below a certain SOC value.
There is also diversion and waste not on Aux 1 .

Larry
system one
Classic 150 , 5s4p  Kyocera 135watt , 12s Soneil 2v 540amp lead crystal for 24v pack , Outback 3524 inverter
system two
Classic 150 ,5s 135 watt Kyocero , Jakiper 48v LiFePO4 , Outback VFX 3648 inverter
system three
Midnite KID MPPT 24 DC in to  12 volt AGM batteries

boB

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 4014
Re: Adjusting the Day Light Nite Light sensitivity
« Reply #2 on: January 31, 2022, 08:57:31 PM »
PV trigger, possibly ?

To make sure it does not trigger on a MPPT sweep or something short lived,  just make the Aux 1 PV Trigger attack time/ delay time (whatever it's called ?) to be longer than a few seconds.   Maybe even a couple of minutes ?
And the HOLD time to be a couple minutes also.

Set the voltage lower than you would ever expect it to go.  Lower than what you normally see it go anyway.  Maybe 20 volts ?

See if that works OK.

This in addition to what Larry is suggesting.

boB
K7IQ 🌛  He/She/Me