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Breaking Lights Flicker in "Off-Grid Mode", On Grid problems

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(@adwilson254)
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Joined: 2 days ago

My wife was getting upset with flickering lights, and my ups for my pc triggers, I believe when certain loads turn on such as the hvac. I disabled Off-Grid Mode and the flickering has gone away, but the priority for solar and the production seems horrible. The supposed priority is loads, battery, and then grid, but I am having a ton of export to the grid and my solar production is lowering dramatically while pulling from the grid more than it does the battery. When I turn on PV Priority for the battery, the solar production returns to how I would expect it to, except the soc stop for the mode doesn't work and it stays in the mode instead of reverting to self consumption again. 

Does the system have problems with handling full solar output to the loads, and the remainder to the battery and avoiding grid sellback?

Does "Fast Zero Export" or "Grid Sellback" even do anything?

System: 2x 18kPV Parallel, 3x Eg4 Indoor(closed loop), 35x Aptos 440 w/Tigo TS4-A-O

235 City Rd

The ground at the service entrance and the ground at the loads are not connected by an dedicated wire, the property has a dedicated ground rod 

 

I am on the most recent firmware, I did not test this on the previous firmware versions.

Screenshot 2025 06 02 at 12.35.17 PM
Screenshot 2025 06 02 at 12.46.19 PM

 

2 Replies
EG4 Eric
Posts: 383
(@eg4eric)
Reputable Member
Joined: 7 months ago

Is that the main service panel where the neutral/ground bond is located?

It doesn't seem like it, but do you have solar on both inverters or only one?

Are you wanting to sell power back to the grid? 

If you are planning to sell back to grid, you will need to enable grid sell back and disable Fast Zero Export.

As far as the flickering issue, this is usually a wiring issue.

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Posts: 2
Topic starter
(@adwilson254)
New Member
Joined: 2 days ago

The bond occurs at the service entrance.

I only have solar on the master inverter now, I have 27 more panels to put up.

No, I have both settings set to where grid sell back is disabled and fast zero export is set to enabled, but it doesn't seem to prevent it.

The flickering occurs only when bigger loads happen and only when not on grid. It looks like a voltage drop during inrush current. Considering it doesn't happen at all when the grid is connected, is this still wiring issue? The location of the flickering has a dedicated grounding rod, not a wire to the transfer switch. That could be the only thing I would question.

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