Spoiler alert.
Yes and no. I need to try and repeat the test but it looks like if the inverter tells it to switch, SA might switch it back. The voltage drops because charging stops during the switch, which could then cause the voltage to be under the value set for option 13. Then the cycle begins again.
Do you ever see Grid Ac in being used even when plentiful Solar is available? Today I had 2.5 KW coming in to each inverter and battery was around 54 volts and inverters were still accepting voltage from grid Ac in. I turned of grid AC in and PV input jumped up on each inverter to 3.5 KW. I hate to be wasting PV during the day.
Are you saying if you are using SA for those settings then you change it manually on the inverter that SA changes the settings back? I'll be interested in your test results.
That can happen if the low and high settings are too close. No matter which device is controlling the switch.
I’m not sure about the manual switch, guess I can add that to my test.
Sure, I only originally noticed it with SA changing first.
You can change setting 13 to a value lower than the battery SOC voltage and the inverter will switch to battery mode. You can use this same method to go back to grid by changing setting 12 to a value higher than the battery SOC voltage; although it may be difficult to achieve this unless you run your batteries below the high limit of 51V for setting 12. You can also just switch to SUB to force inverter to grid.
Good to know.
Holy sh**!
If the battery declined to the point of your 'to grid' setting and then the sun came up it's in that cycle and stuck there until it reaches your 'back to battery' setting. so yes, it is possible that you would have lots of solar but still be on grid because you're back to battery voltage is set too high.
I would understand that but this was well after early morning sun.....as soon as I cut off the AC in to the inverters it never linked backup after I turned the breakers back on. I hate to waste solar.
Open the manual for your inverter charger. Go to the place where the settings are for to grid voltage and back to battery voltage.
Well now that's nice....I just checked the settings.....guess what, the inverters had reset themselves to 110 volt instead of 120, don't know why, they just did. I never touch this setting. Maybe it's when they decide to switch between host and slave at random times like they do. I then lowered the voltage return to inverter power and even though the battery was above this and was not using grid power at the time, everything shut down for a second or two.....shit, freeze drier now has to re-do a load.
I've been hesitant to put our freeze dryer on solar so far. It has to run such long cycles for some stuff and, as you obviously know, it's a pain to have to restart a load. It's more seasonal use for us but when it's that time, man, that thing is an energy hog. How long have you been running yours on solar?
Just started yesterday. It was on it's own circuit from the grid, but I was not utilizing all my panels and felt like I was wasting them. Heck, I was running a load ( couple of towels and pair of pants) of clothes in the washer just so I could run the dryer....gotta use electricity to make electricity.....So like you said, it being a real energy hog, I started it on the solar. Now my only load not on solar is my heat pump. Might try getting a soft start or even a sperate mini-split to run off the solar.
I'd like to put at least one heat pump on solar but I'm dealing with existing wiring and figuring it out. I got a quote a few days ago on replacing all three units, a 3 ton and two 2 ton, mostly because they're 11 years old and I wouldn't mind something more efficient. But at $60k to replace 3 units I'm thinking I can keep these running a few more years. Gonna get more quotes but that seems nuts to me. That was for 18 seer Goodman, which isn't exactly top of the line. Ugh.
