Back-up function of the inverter
The GoodWe inverters are only design to be connected to the grid and are not suitable for pure off grid operations. However, the storage inverters are equipped with a back-up function that allows the inverter to keep supplying power to a small number of appliances during a shorter period. This can for example be useful in places with unstable grid than suffers from frequent power outages.
In case the inverter loses connection to the grid (for example during a power outage) the inverter will shut down for a very short time (only 0,01seconds!) and restart in backup mode that keep powering the backup loads as long as the installed PV and battery can manage to generate enough energy to cover the loads.
The picture below shows the flow diagram of the power when connected
to the grid as well as when the connection is lost (green square).
As seen in the picture, the backup loads are connected separately to the inverter and are the supplied with power both when connected to the grid as well as without.
The maximum load that can be connected as backup loads are limited and depends on the inverter model. The total load connected as backup loads can not exceed the rated capacity of the inverter and is also limited to be distributed equally over each phase. Therefore, it is necessary during installation to choose what appliances that should be connected as backup loads. Often, appliances that uses little power are chosen (e.g., router/modem, lights, television, computers, and fridge/freezer). More power demanding appliances (e.g., washing machine, stove, oven, and electrical heating) will often exceed the maximum capacity that can be connected as backup loads and are therefore not recommended to connect as backup loads.
The number of appliances connected as backup loads will also limit the time they can be sustained during a disconnection from the grid. For example: If there is a power outage during night-time, the PV won’t supply any power and all power will be extracted from the battery. If more loads are connected and used, the battery will of course be drained much faster and thereby reducing the time the backup loads can be powered.
Related Articles
Inverter offline on the SEMS PORTAL while the inverter's wifi has connected with the router.
1:check the WIFI indication LED light,if the light is solid on,please check the following: 1.1:Does the router has get a fluent connection with the internet,use the laptop to open a webpage with browser after connecting with the wifi router to see ...The storage plant does not show the Energy Flow Chart on SEMS Portal.
1;Check and confirm if the SN has been added into the Plant. Go to "Management"-->"Device"; 2;Click the plant which you are going to add the device,customer can see the details after clicking the plant: Click the "Add" button to proceed. 3;Fill in ...WiFi Configuration via APP
Via APP Preparation a. Power Wi-F¡ inverter on; b. If you are configuring Wi-Fi inverter, make sure the yellow led on front cover is blinking; c. Power Wi-F¡ router on; d. Search for the keyword "SEMS Portal" from Google Play Store or Apple App ...WiFi Connection Set up via SEMS App
1. Once create the plant, click the WiFi set up button on App and click Next. 2. Go back to mobile wifi setting and connect with inverter's Solar WiFi (password: 12345678), go back to SEMS APP after the Solar WiFi is successful ...Cannot find Wi-Fi signal of Solar-WiFi?
1. Make sure inverter is power on and antenna is intalled;- 2. Move closer to inverter; 3. Restart inverter, 4. Do 'WiFI Reload operation via button on the front cover of inverter.