MARSTEK Showcases Microstorage System At Intersolar

Balcony PV-plus-storage system provider MARSTEK participated in Intersolar Europe 2026 with its flagship product, VENUS E 4.0.  

This microstorage system, with its 314 Ah lithium-iron-phosphate (LFP) cells, features 5 kWh of battery storage. According to the company, this pack has a life of more than 10,000 cycles (charging/discharging). A 3 kW bidirectional inverter is placed between the storage and the grid in an AC-coupled configuration as an intermediate conversion system. The whole system is squeezed into a compact 520 × 430 × 191 mm (W × H × D) enclosure. 

On the operational front, the system with balcony PV modules is rated to deliver full-load power of 3 kW (single-phase) in on-grid mode. It switches to emergency backup mode within 10 ms of a grid outage and delivers up to 3 kW backup power to household loads. Its capacity can be expanded to up to 9 kW/15 kWh by connecting 3 units in parallel via an external smart box that connects to the house’s main panel. 

The system can provide whole-home backup, covering even heavy home appliances. This plug-in system can also optimize its battery charging and discharging in line with dynamic electricity tariffs via an AI-assisted energy management system (EMS) platform, MARSTEK intelligence. Additionally, users can use their balcony PV storage system as a revenue-generating grid asset by participating in a regional virtual power plant (VPP) program. Prosumers who own an electric vehicle (EV) can plug the microstorage system into their garage and connect Marstek’s portable EV charger to automatically manage vehicle charging. 

This product is expected to be commercially available in 2026.