The powerplant has a Fronius Hybrid inverter, that can be used to connect a Fronius battery. The power plant therefore works exactly like a network connected power plant, but here is the ability to increase the amount of batteries afterwards.
Many people are now buying this inverter and leave waiting for the battery prices to drop.
https://www.aurinkopaneelikauppa.fi/Solar-Power-Plant-5700W-with-battery-inverter/Shops/20120903-11092-142553-1/Products/1605BSolar Power Plant 5500W with battery inverterhttps://www.aurinkopaneelikauppa.fi/WebRoot/vilkas04/Shops/20120903-11092-142553-1/5B55/CF7D/2EDA/0314/25C8/0A28/1012/D301/Fronius_Hybrid.jpg6790EURInStockCategories/ongrid/AurinkosaehkoeCategories/ongrid/AurinkosaehkoepaketitCategories5500W
20 x 275W polycrystalline solar panel
5kW Fronius Hybrid network inverter
60m solar cabel + connectors
Safety switch + sign
Roof mounts (mention roof type in order)FroniusVilkasNewProduct