APSystems EMA

Overview of APSystems Energy Monitoring and Analysis

How The System Works*

For systems using APSystems microinverters, information on energy production is collected by a device known as the Energy Communication Unit (ECU). The ECU resides inside the house and must be plugged into an outlet and linked either wired or wirelessly to your Internet-connected home network.

The ECU communicates with the microinverters over the power lines in the house. Because other devices plugged into the same circuit can interfere with the EMU's ability to communicate with the microinverters, the EMU should be plugged in to an outlet on a circuit with little to nothing else running on the same circuit. Ideally, it should be by itself on the circuit. I've also been told it helps if the outlet is as close as possible to the breaker box.

Only a minimum amount of information is available through the ECU LCD screen. To get indepth information from the ECU, it needs to be connected to your home network. It can be connected by wire or wirelessly. Once connected, you can access information off of the ECU from a computer on your network. If you are also connected to the Internet, information will also be sent to APSystems and made available through the APSystems EMA website. However, you or your solar installer need to contact APSystems to get an account set up where you can login to their website.

* Information on this page is specific to APSystems ECU version 4


To access the ECU directly from your home network, you read the IP address off the LCD display on the ECU. Enter this address on your web browser to access the ECU. You may have to do this during initial installation of the system in order set the microinverter IDs up on the Administration screen (see screen shot, though actual microinterter IDs in screenshot are not shown). However, it is also possible for the microinverter IDs to be set up when the APSystems account is set up, in which case manually entering the microinverter IDs will not be necessary.

Within the ECU screens, you can see summary information, real time data for all inverters, along with power and energy information for the current day and all days since the system was activated.

Important installation note: It is critical that your installer saves a list of your APSystems microinverter IDs before completing system installation, as they are needed for system setup and it will be exceedingly difficult to read microinverter IDs off of the actual microinverters after they are installed on the roof beneath a sheet of solar panels.

ECU Home screen
ECU Real Time Data screen
ECU Real Time Data - Power screen
ECU Real Time Data - Power screen
ECU Real Time Data - Energy screen
ECU Real Time Data - Energy screen
ECU Administration screen

** Screenshots in this section have some personal identifying information removed.

APSystems EMA**

Assuming your ECU is connected to the Internet and you have an APSystems account set up, you can visit the APSystems Energy Monitoring and Analysis website to obtain information on your solar installation. In addition to providing a way to monitor you system from anywhere and not just at home, it also provides additional reports and analysis not available from the ECU itself.

If you wish to provide access to this information on another website or just to a select group of family or other people, you can check a checkbox on the settings screen and use the "Authorized ID" value to build a webpage link that can be used to access the information. When using this approach, the viewing user does not need login information, but information available is restricted to a subset of what you see when you login (for example, the Module screen will be unavailable), and of course they will not be able to see or change any critical system settings.

EMA Login screen
EMA Dashboard screen
EMA Module screen
EMA Report screen

** Screenshots in this section have some personal identifying information removed.