Well this is weird!

10 comments started 2022-03-18 last 2022-03-18
GivEnergy ProductsAC Coupled
#1 Woodstock

Since solar PV started generating this morning my system is exporting to the grid three times what is being sent to the battery.

Mode has not been changed and is set to Eco.
Not seeing the start/stop charging typical of intermittent cloud cover.
Battery is charging continuously but only at a quarter of the power it should be.

Any ideas what is going on? Is anyone else experiencing something similar?

#2 THALL

On your inverter card are the battery charge discharge options set to full power?

#3 Woodstock

THALL No, they are set to 2949W. That really is 2949W (raw 36) not 3000W (raw 50) that is displaying as 2949W. 😆

#4 THALL

Woodstock Is it set like that on the remote control option? I can't think of another option that would cause your issue.

K
#5 Kevsla

I had a similar experience this morning. House demand running off solar and the excess exporting to the grid, not into the battery. I briefly changed modes and then back into Mode 1 and everything is fine since. I assumed it was a glitch with my system, but possibly not now. I have had the system 18 months now and this is the first time this has occurred

#6 Woodstock

THALL Ok, been investigating a bit more.

The last change to any settings was 8.00pm Wednesday when battery charge was set to 2949W using the slider. Remote control history shows 2949W (raw 36) value sent and 2949W (raw 36) response.

System ran perfectly normally all day Thursday and achieved 100% battery charge.

Battery discharged to house load Thursday night and early Friday morning (down to around 70% SOC) until solar PV kicked in and battery started charging at a much lower value than expected with the system exporting way more than expected to the grid.

Performed a read only on battery charge setting and it came back 82W (raw 1). This made no sense as remote history showed (all filters turned off) no changes since it was set to 2949W on Wednesday night and the rates the battery had been charging at yesterday were normal range (up to 3200W) and this morning were up to 230W. Also the battery charge this morning was going up and down not hitting a limit (flat lining at a specific value).

Sent a slider request to set battery charge to 2949W and this came back as previous value 82 (raw 1), value sent 2949 (raw36), response 2949 (raw 36). Battery then started charging at expected rate for two five minute periods before dropping to 0W with all PV excess going to export!

Waited for three five minute periods just to check that this was not caused by clouds but charging remained at 0W.

Then tried turning Eco mode off and back on again and this restored everything to normality.

Interesting that KEVSLA also restored battery charging this morning by bouncing the Eco setting.

#7 Woodstock

Kevsla As you can see in my response to THALL above; I too restored battery charging this morning by turning Eco mode off and on again. From your post it sounds as if your system was not charging the battery at all right from daybreak whereas mine was charging the battery but at a much reduced rate. Having said that, my system had got into a charging battery at 0W state before I bounced Eco mode and everything returned to normal. Very peculiar!

#8 THALL

Time to raise a bug report

Y
#9 yandards

Humn, mine seems to have done similar, figured it was a Zappi issue..

#10 Woodstock

yandards No such modern wizardry here; just twelve year old solar PV and a simple AC-3.0 inverter/8.2kWh battery combo.

I do have an ebike but the battery is only 0.5kWh so a Zappi is probably overkill for my needs! 😀