n2aws
Solar Addict
- Joined
- Oct 24, 2022
- Messages
- 680
Hi!
The short explanation: I'm trying to enable "sell" to the grid, for net zero with an XW pro. I can't seem to find the right combination of settings to make this happen.
The long, for context:
I have an XW Pro, and MPPT 60/150, an MPPT 80/600, an insight home, a wattnode modbus, and 6 48v EG4 batteries connected to the insight for closed loop communications.
The EG4 batteries are a recent change, and previously I had 600ah of AGM batteries. With the AGM batteries, I was able to leave the XW Pro in 2stage charging. The MPPTs in 3stage, and when it went to float, it would send the excess to the critical loads, and when that was zeroed, it would "sell back" to the main panel and curtail output as it approached grid zero (I can't sell back to the utility). This worked fine. Batteries would stay at 54v, in float, and zero the grid.
With the change from AGM to EG4, I've enabled the closed-loop communications and now use SOC instead of voltage. I've used the same settings that worked with AGM, with no luck. When the batteries get to full charge, the charge controllers go to float, and then stop producing power. I've got a spreadsheet where I've documented every combination of the following, and tried them without success:
Grid support: Enabled, and disabled
Grid Sell: Enabled and disabled
Grid support SOC: 80%, 99%, and 100%
MPPT charge mode: standalone, primary, secondary, echo
The above produces too many combinations to list.. but, I've actually tried *every* configuration possible between those settings. Obviously, I'm missing something that is needed. Is anyone successfully using "closed loop" communications, and still able to successfully sell excess power back to the main panel (but not to the grid, using the wattnode to measure the energy at the utility mains)
The short explanation: I'm trying to enable "sell" to the grid, for net zero with an XW pro. I can't seem to find the right combination of settings to make this happen.
The long, for context:
I have an XW Pro, and MPPT 60/150, an MPPT 80/600, an insight home, a wattnode modbus, and 6 48v EG4 batteries connected to the insight for closed loop communications.
The EG4 batteries are a recent change, and previously I had 600ah of AGM batteries. With the AGM batteries, I was able to leave the XW Pro in 2stage charging. The MPPTs in 3stage, and when it went to float, it would send the excess to the critical loads, and when that was zeroed, it would "sell back" to the main panel and curtail output as it approached grid zero (I can't sell back to the utility). This worked fine. Batteries would stay at 54v, in float, and zero the grid.
With the change from AGM to EG4, I've enabled the closed-loop communications and now use SOC instead of voltage. I've used the same settings that worked with AGM, with no luck. When the batteries get to full charge, the charge controllers go to float, and then stop producing power. I've got a spreadsheet where I've documented every combination of the following, and tried them without success:
Grid support: Enabled, and disabled
Grid Sell: Enabled and disabled
Grid support SOC: 80%, 99%, and 100%
MPPT charge mode: standalone, primary, secondary, echo
The above produces too many combinations to list.. but, I've actually tried *every* configuration possible between those settings. Obviously, I'm missing something that is needed. Is anyone successfully using "closed loop" communications, and still able to successfully sell excess power back to the main panel (but not to the grid, using the wattnode to measure the energy at the utility mains)