Manual #

Introduction #

My Home Battery is a small app to monitor and control a home battery. Currently only one type of battery is being supported by it. This is the “Sessy” battery, a product of the Dutch company Charged. More details about the battery can be found at www.sessy.nl

Features #

The app communicates directly with the battery via the local network. It can display the current status and strategy. Via the app the battery can also be switched into different modes.

Home screen #

The home screen contains cards of known batteries with the status of each of them.
Below is a screenshot of an example with one battery. It is possible to add multiple batteries.

If you want to reorganize the screen you can drag the cards around. Holding a card will activate “multi-select” mode, which gives you the possibility to give multiple batteries the same command.

Detail screens #

The detail screen contains the same information as shown in the Home screen plus some controls, depending on the device.

Sessy P1 detail screen #

The detail screen for the P1 device shows the different metrics available, such as the current power consumption.

Sessy Dongel detail screen #

Sessy Dongel schedule #

The Sessy Dongel can be active via “Charge / Discharge” schedule (ROI or Schedule mode). The Schedule shows the base electricity price and if the Dongel will charge, discharge or stays idle. The schedule will be with hourly or quaterly (15 min) prices. This is something that can be configured in the Sessy portal. The My Home Battery app will automatically detect which setting is active.

Sessy Dongel system details #

The system details show the “System details” of the Sessy Dongel. It also shows the internal counters for imported and exported energy.

Imported Energy and Exported Energy are internal counters of the system. These have been activated with one of the firmware updates. They have been counting since then (or when it’s a brand new Sessy since the first turn on). At the moment these counters cannot be reset.

Add device #

Adding a new device is quite easy. Just tap the floating “+” to add a new device.
In the next screen you can either manually enter the details or tap the camera icon to scan the sticker that came with the Sessy.
Sessy comes with two type of stickers, one which contains only one QR code which says “Scan in portal” and one with two QR Codes. The latter needs to be scanned.

With the dropdown you can select what kind of device you are going to add. This is either the “Sessy Dongel” (WIFI Dongle) or the Sessy P1 meter. Both devices require the information that can be found on the sticker that came with the device. Below an example of the sticker that came with a “Sessy Dongel”.

• Name contains a descriptive name for the device, it’s just for presentation and will be used as a label

• Address contains the ip-address/hostname of the controller of the device.
  You can look-up this address within the Sessy portal (https://portal.sessy.nl)
  Alternatively you can try to use the “WiFi naam” from the sticker with .local added to it. So for the sticker above that would be Sessy-DJT7.local

• Username contains the username for the device
  The value next to “Gebruikersnaam” from the sticker

• Password contains the password for the device
  The value next to “Wachtwoord” from the sticker

Edit device #

Within the edit device screen you can edit the details of the device, such as connection information. For example when the connection information has been changed. You can also edit the “advanced” settings for the device. These are settings specific for the device.

Advanced Dongel settings #

The dongle also has some advanced settings. The advanced button will open a list of extra settings. The following settings are available:

• Show Idle button
  Shows or hides the Idle button. On small screens you might need to scroll to have this button completely visible

• Show solar production Shows the solar production, when the solar panels are connected to this dongle

• Show external power
  Shows the power that flows via the “external” when it is in use

• Show charge/discharge Shows an extra metric saying “Charging” / “Power delivery” on the card in the main screen

• Charge amount
  Amount (in watt) with which the battery will charge when the charge button is pressed

• Discharge amount
  Amount (in watt) with which the battery will discharge when the discharge button is pressed

• Simplified screen
  Makes the detail screen display a simplified version with only two buttons

• Left button on simplified screen
  Action for the left button on the simplified screen

• Right button on simplified screen
  Action for the right button on the simplified screen

Advanced P1 Settings #

The P1 device also has advanced settings.

• Show Gas usage Displays the information received from the Gas meter

• Show active tariff Shows “Low” or “High” depending on the active tariff

• Show production Shows production from the Sessy / Solar panels

• Activate Grid target Activates the “Grid target mode”. With this mode you can set the target the Sessy needs to apply when running in NOM mode. Normally this would be 0 (zero), but for example if you always want to have energy flow towards the grid you set it to a value below zero. (see a demo image below)

• Colorize grid target Will have the card display a different color when the Grid target is set. (See demo image below). This settings works independently of the “Activate Grid Target”

• Modbus Mode When you have a modbus meter attached to the P1 meter (V2 and onwards), show the modbus data instead of the smart meter data

• Show Modbus separate Shows both the data of the smart meter and the modbus meter in the detail screen

General app preferences #

There are a few settings which control the app behavior

The app can run in English or Dutch and defaults to English.

• Show labels will show a label on top if the cards in the home screen

• Show unit will show the units of measure, such as KwH or A for the various metrics

• The refresh interval controls how often the app fetches new data from the devices

• With guess single phase the app tries to guess if you own a “Single phase set-up” and hides the other phases in the detail screens

• Decode system state will try to decode the warnings and errors of the Sessy when they occur. See below for an example.