Eaton AbleEdge Smart Breaker for the Lunar System
Eaton AbleEdge Smart
Breakers for the Lunar System
Summary
The Lunar System, when paired with Eaton AbleEdge smart breakers, offers a flexible and cost-effective solution to extend backup and expand existing solar systems. Installed inside or near the Lunar Bridge, these breakers dynamically manage loads and solar production when off-grid via a dedicated Wi-Fi network. The Lunar App also allows customers to monitor and control individual loads remotely, providing advanced insights into circuit-level home energy patterns.
Figure 1. EATON Integration Diagram
| AC PV Install Conditions | Description |
|---|---|
| Maximum AC PV in backup | 11.5kW combined of non-Lunar AC PV |
| Maximum AC PV outside of backup | Unlimited |
| Lunar DC PV | DC PV is not required for the Lunar System. DC PV size is independent of AC PV size. Maximizer stringing rules apply. |
| Additional CTs for PV | No additional CTs required for PV. |
| Line side tap | Install breaker between fused disconnect and AC PV |
Installation Requirements
Eaton AbleEdge smart breakers come in 15A, 20A, 30A, 40A, 50A, and 60A sizes. These 2-pole circuit breakers offer GFCI protection and revenue grade metering. See detailed product specifications for Eaton AbleEdge smart breakers.
The Lunar System supports up to 8 smart breakers in total.
Smart breakers communicate wirelessly with the Lunar Bridge or Lunar Meter Socket Adapter Controller (MSA Controller). They can be installed inside the Lunar Bridge or in any compatible EATON subpanel with maximum distances as detailed below.
| Configuration | Free air | Through 1 wall(wood/drywall) | Through 1 wall(concrete/brick) |
|---|---|---|---|
| Maximum Distance | 75ft(23m) | 30ft(9m) | 10ft(3m) |
Table 2. Wifi communication ranges from subpanel to Lunar Bridge or MSA Controller.
Note: Communication over greater distances and more walls are achievable if the Eaton subpanel door can remain open (only applicable to interior subpanels)
Incorrect breaker installation can lead to nuisance GFCI tripping. When installing, ensure the load neutral wire (if present) is terminated directly on the breaker, not on the neutral terminal bar. The neutral pigtail from the breaker should then connect to the neutral terminal bar.
Figure 2. Smart Breaker Wiring Diagram
Smart Breaker Functionality
Eaton AbleEdge smart breakers are controlled using an internal relay, which is electronically and remotely actuated to open or close the breaker’s internal contacts without affecting the mechanical handle. Eaton AbleEdge smart breakers must be commissioned with the Lunar Installer App to ensure a fully integrated load management experience with the Lunar System. The behaviors, functions, and end user controls are detailed below.
Manual Control
With Manual Control, customers turn on or off the breaker anytime using the Lunar App (whether they are on-grid or off-grid). The breaker state transitions only when toggled via the app. Customers may remotely shed non-essential loads with a single tap on the Lunar App to preserve battery capacity, curtail peak load, and extend backup power duration.
Automatic Control
With Automatic Control, the breaker can be programmed either to (1) turn off immediately when off-grid, or (2) below a user-set battery state-of-charge (SOC) when off grid. Upon restoration of grid power, breakers in Automatic Control will revert to the pre-outage state.
Solar Inverter AC Coupling
The Lunar System with smart breakers offers a flexible solution to homeowners who wish to add more battery and solar to their existing PV systems. Multiple solar inverters (up to 11.5kW AC combined) can be connected to the Lunar System regardless of whether DC PV is present. This section details requirements and behaviors of Lunar sites with AC-coupled solar inverters.
| AC PV Installation Requirements | Description |
|---|---|
| Maximum AC PV in backup | 11.5kW combined of non-Lunar AC PV Examples (1) 1x 7.6kW Solar inverter and 1x 3.8kW Solar inverter (2) 3x 3.8kW Solar inverters. Note: Up to 8 smart breakers can be used to support multiple AC PV connections. For improved inverter-level monitoring and to prevent ground/arc faults from shutting down all PV, a dedicated smart breaker per AC PV system is recommended. A PV combiner subpanel with a single smart breaker is allowed, but not recommended. |
| Maximum AC PV in non-backup | Unlimited Note: All non-backup loads and non-backup AC PV must be on the load side of the Lunar Rogowski Coils, along with the backup loads and backup AC PV. |
| Compatible Solar inverters | All CEC-listed models and makes. |
| Lunar DC PV size | 0-15kW dc. DC PV is not required for the Lunar System. DC PV size is independent of AC PV size. Maximizer stringing rules apply. |
| Additional AC PV Metering | Smart breaker acts as a metering device for AC PV. No additional CT for PV circuits. Note: Rogowski coils may still be required to monitor site import and export for partial home backup (i.e. AC PV in non-backup) |
| Line side tap | Install breaker between fused disconnect and AC PV, by (1) turning the fused disconnect OFF (2) splicing the inverter output wires inside the inverter enclosure (3) splicing there and back to an adjacent 2-space subpanel with a smart breaker Note: Utility coordinated disconnect is not required. It does not touch or modify the tap, nor touch the wires between the tap and the fused disconnect. |
Off-grid Behavior
The Lunar system charges from AC PV, and curtails or turns off the AC PV as needed.
On-grid Behavior
The Lunar system does not turn OFF or curtail the AC PV. If AC PV production exceeds instantaneous home load, the battery may attempt to charge from the excess AC PV. Future software updates will ensure the battery discharges to cover home consumption, while allowing all AC PV generation to be exported to the grid.
California NEM 1 and NEM 2
For customers who wish to remain on California's Net Energy Metering (NEM) 1.0 or 2.0 programs, the new Lunar system must be set up as a non-export system to retain NEM status. Recommended operation settings are outlined below to ensure regulatory compliance.
California Net Billing Tariff (NEM 3)
Smart breaker feature summary
| Load Type | Breaker Behavior | Description |
|---|---|---|
| Regular Load | Configurable by Lunar App and Installer App | Manual control. The breaker can be remotely turned on or off at all times, regardless if the system goes on grid or off grid. |
| Regular Load | Configurable by Lunar App and Installer App | Turn off when off grid. The breaker automatically turns off when the system goes off-grid and reverts to its previous state when back on grid. |
| Regular Load | Configurable by Lunar App and Installer App | Turn off at low state of charge when off grid. When off-grid and battery state-of-charge (SOC%) falls below a user-selected threshold, the breaker automatically turns off. It reverts to its previous state when back on-grid or when SOC rises above the threshold. |
| Solar Inverter | Configurable by Installer App only | Solar Inverter AC coupling. AC PV powers home and charges the battery when off grid. AC PV is curtailed as needed by the Lunar system when off-grid. |
Commissioning Smart Breakers in Lunar Installer App
| Step | Description |
|---|---|
| 1 | Follow initial commissioning steps 1-3 to connect to the Lunar system via Install App. Detailed instructions may be found in the Installer App Commissioning Guide. |
| 2 | Navigate into the Smart Breakers screen within the Devices section. |
| 3 | Tap “Connect New Breaker” to initiate the connection process via Bluetooth. |
| 4 | Follow the prompt and stand in front of the Eaton Abledge smart breaker to press and hold the “Test” button until the blinking status LED from purple to blue. LED Light Indicator: Blinking Purple Light - Available to Connect; Blinking Blue Light - Connection in process; Blinking to Green Light - Connection Successful. |
| 5 | If pairing is unsuccessful or the syncing process times out, reattempt steps 4-5. |
| 6 | Upon successful pairing of the breaker, a single audible click may be heard following the LED indicator turning solid green. |
| 7 | Keep the phone near the Smart Breaker until the connection is successful. Then continue to the Breaker Settings screen. |
| 8 | The Installer App requires a Wi-Fi connection to the Inverter to commission each breaker. If the breaker location and the Inverter are far apart, the installer must bring the Installer App phone back within range of the Inverter to finish connecting each one. |
Troubleshooting
The Lunar Installer App provides live troubleshooting and fault guidance while connected to the system. Follow any on-screen instructions to address installation or commissioning issues.
Eaton AbleEdge smart breakers communicate their current state on the branch power and trip code LED indicators. For a complete explanation of these LED patterns, refer to the EATON AbleEdge smart breaker LED descriptions.
Arc Fault and Ground Fault Circuit Interruption
Eaton AbleEdge smart breakers have built in arc fault and ground fault circuit interrupters that sense current on the load circuit neutral. These protections may be a cause of breaker tripping at the time of first installation. The wiring condition causing the fault will need to be identified and remedied.
To troubleshoot:
- Verify the load neutral wire is correctly terminated on the breaker (not the neutral bar).
- Use a clamp meter to measure current on the load neutral and ground wires, and identify the source of the errant current.
Revision History
| Revision | Description of Change | Effective Date |
|---|---|---|
| 1 | Initial Release | 07/09/2025 |
| 2 | Add AC coupling | 08/27/2025 |
| 3 | Update diagrams | 10/1/2025 |
| 4 | Minor updates | 12/1/2025 |