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Topic starter
June 2, 2025 9:26 pm
Hi everyone,
I have an eight 420W solar panel system with an EG4 18kPV hybrid inverter and the EG4 WallMount All Weather Lithium Battery. It was a pretty long journey from the initial stage of getting the panels installed with an inverter to where I am now, about 6 months. Issue was the initial inverter (Tesla) was not approved by PG&E for non-export mode (this is my second solar system). The solar company took a few months of back and forth to come up with a design that was approved. End result was I got a much better inverter (EG4 18kPV) and optimizers added to my panels. Once they came out to swap the inverter I learned about EG4 and that there was a battery available. I ordered one from Signaturesolar and had it installed last week.
I am now trying to figure out how to program things to charge the battery during the day when I have sunlight and then use it in the evening/night when I would be using PG&E power. If anyone knows of a guide I would appreciate pointers. The app and website have lots of data/features but is a little confusing to me. 🙂
Here is a picture of my inverter and battery during the installation of the battery.
Cyrus
coolcat reacted
June 4, 2025 9:11 pm
You can set up PV priority charge which will prioritize PV to charge battery in the morning. Make sure that you have Battery backup Disabled, this will ensure the inverter uses battery before using the grid to power loads.
If you need further assistance, please let me know! I'd be happy to help!
Topic starter
June 10, 2025 6:28 pm
@eg4eric Thank you very much for the information.
Here is what I am hoping to get out of my system:
1) Charging battery with solar during the day up to 80%
2) Using battery in the evening to offset PG&E usage
3) Having the battery be used when we have a power outage
One thing I have not found when looking around the EG4 site is instructions on the Android App or the web page for configuring my system. There is a lot of information and sections, but I am not finding explanations of what things are. It would be great if there were some examples. Is there an application user guide?
Thanks again!
Cyrus
June 13, 2025 6:16 pm
1) You can set the System Charge SOC Limit(%) to 80%, but then will not allow the batteries to charge to 100% at all. It will always charge to 80% (This would not be recommended). It is recommended to have an 80% DoD. So either charge to 100% and discharge to 20% or charge to 90% and discharge to 10%.
2) You can enable Battery Backup Mode and enable Force Discharge, then set the desired time parameters. This configuration ensures the battery remains idle until the specified discharge time is reached.
3) As mentioned in Step 2, when you enable Battery Backup Mode It will save the battery as last resource, so when there is an outage, the battery will power loads.
