Solar Production

NET2GRID solution implements an intelligent, non-intrusive, inverter-agnostic service that provides an overview of an installation’s solar production daily in a very cost-efficient way. Our approach utilizes several state-of-the-art AI techniques to estimate the actual solar production time series without additional metering equipment or the inverters’ API while simultaneously resulting in a mean accuracy of 90% on our solar production predictions. Additionally, we are supporting solar production on a total installation level, meaning that the approach is independent of the amount of installed panel capacity or having multiple different brands of inverters (apps) being installed over time since, lately, it is common for people to extend their solar investment continuously.

More specifically, the solar production metrics that are visualized for the end user are the following:

• Generated Solar Production: The value of the overall estimated daily/monthly solar production in kWh. The percentage shows how much of the overall installation consumption was covered by solar production.

• Solar Production To Grid: The value of the estimated daily/monthly solar production that was returned to the Grid, in kWh, and as a percentage of the overall solar production of the installation.

• Solar Production Used: The value of the estimated daily/monthly solar production used by the installation for self-consumption purposes, in kWh, and as a percentage of the overall solar production of the installation.

• Peak Production Value: The peak of the active power value for production during the day/month, in Watts. This is the maximum value solar production reached during the period of interest.

• Peak Production Timestamp: This specific date and time the peak mentioned above value appeared on the solar production time series. of the second that the peak value of solar production was monitored for that specific day, in dd/mm/yyyy, hh:mm format. It must be noted that even though it is expected that this local time represented by the peak timestamp would be similar each day, this may not always be the case. This is because this metric can be heavily affected by the weather conditions at a specific date and place.

• Sun Hours Monthly Efficiency Percentage: This percentage shows the efficiency of the solar panel for a specific day/month compared with the actual maximum capacity of the solar panel for that specific month. This is a different metric since the maximum capacity during winter is expected to be lower than during summer.

• Sun Hours Annual Efficiency Percentage: This percentage shows the efficiency of the solar panel for a specific day/month compared with the actual maximum capacity of the solar panel.

Fetching Solar Production Metrics for a requested day

The Get daily solar production SDP API endpoint allows developers to retrieve the solar production metrics for a specific day of interest. These solar production details can then be used within the customer's solution.

A pseudo-code request to the Get daily solar production endpoint looks like this:

GET /v2/solar/production/daily/{year}/{month}/{day}
Authorization: Bearer <access_token>

A successful request will return a response similar to the following:

{
  "status": "ok",
  "data": {
    "DailyProduction": 54.871,
    "PeakTime": "2019-09-01T16:32:10+02:00",
    "PeakValue": 6003,
    "OverproductionPercentage": 44.306,
    "EfficiencyAnnual": 0.524,
    "EfficiencyMonth": 0.524,
    "PerHour": [
      0,
      0,
      0,
      0,
      0,
      0,
      0.077,
      0.902,
      1.746,
      2.991,
      4.413,
      5.261,
      5.567,
      5.806,
      5.973,
      5.932,
      5.465,
      4.566,
      3.396,
      2.181,
      0.572,
      0,
      0,
      0
    ]
  },
  "day": "2022-06-28",
  "timestamp": "2022-08-18T10:16:23+02:00"
}

As you'd probably expect, the response contains the standard JSON structure containing the status field indicating whether or not the response was successful. If successful, the data field will contain a list of appliance events for a specific day. Each message consists of the following properties:

Fetching Solar Production Metrics for a requested month

The Get monthly solar production CE-API endpoint allows developers to retrieve the solar production metrics for a specific month of interest. These solar production details can then be used within the customer's solution.

A pseudo-code request to the Get monthly solar production endpoint looks like this:

GET /v2/solar/production/{periodType}/{year}/{monthOrWeek}
Authorization: Bearer <access_token>

The type of period for which we request data can be either "weekly", "monthly", or "yearly".
The month or the week of the year for which the solar production metrics are requested. Accepted formats for months are numeric representations with two digits with leading zeros (08) or without leading zeros (8). In the week's case, the accepted format is W {numeric representation of week} (W26). In the case of a yearly call, this parameter is not required.

A successful request will return a response similar to the following:

{
  "status": "ok",
  "data": {
    "Delivered": 1940.51,
    "Received": 3993.493,
    "Production": 219.484,
    "ProductionCost": 28.5329,
    "PeakTime": "2019-09-01T16:32:10+02:00",
    "PeakValue": 6003,
    "UsedProduction": 0,
    "EfficiencyAnnual": 0.524,
    "EfficiencyMonth": 0.524
  },
  "timestamp": "2022-08-18T10:22:36+02:00"
}

As you'd probably expect, the response contains the standard JSON structure containing the status field indicating whether or not the response was successful. If successful, the data field will contain a list of appliance events for a specific day. Each message consists of the following properties:

The following image provides an example on how this is used in the Ynni Mobile App.