In its annual Energy Storage Inspection, the Solar Storage Systems Research Group at HTW Berlin compares and evaluates the energy efficiency of PV-battery systems.
In the 2024 edition of their annual Energy Storage Inspection, the test team of HTW Berlin assessed twenty solar energy storage systems from fourteen different manufacturers.
One of the Energy Storage Partnership partners in this working group, the National Renewable Energy Laboratory, has moved forward to collect and analyze information about the existing energy storage
The ranking is based on the specially developed “System Performance Index” (SPI), which compares the simulated real operating behavior, taking into account the individual loss mechanisms,
For the 7th time in a row, all manufacturers of systems or components for storing solar electricity in residential buildings were invited to take part in the Energy Storage Inspection 2024.
o System H2 scores an SPI (10 kWp) of 95.1 %, which is the highest system efficiency measured in the Energy Storage Inspections so far. o The majority of the 20 analyzed PV-battery
We analyze the SPI as well as the results from each Energy Storage Inspection and incorporate all findings into the (further) development of our hardware and software.
Using the System Performance Index (SPI), the HTW Berlin compares storage systems in terms of storage capacity, performance, conversion efficiency and standby power consumption, among other
The SPI of a PV storage system summarizes the efficiency losses in one key figure, thus making different storage systems comparable. This year, 16 out of 20 tested systems achieved a very good
The first of these analyzes the SPI (System Performance Index) for a 5 kW photovoltaic system with an annual household consumption of 5,010 kWh/a. Here, the Fronius Primo GEN24 6.0
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Our modular energy storage portfolio ranges from compact lithium-ion batteries to 20ft/40ft mobile containers and outdoor all-in-one storage cabinets with IP54 protection. We are a leading energy storage equipment manufacturer, offering communication cabinets for 5G/telecom, server racks for data centers, and IP54 rated enclosures for harsh environments. Our stackable design allows flexible capacity expansion, while our grid-forming technology ensures stable off‑grid operation. Whether for remote base stations, off‑grid power systems, backup emergency power, integrated PV-storage or large zero‑carbon parks, our products feature advanced thermal management, deep discharge cycling, and compliance with European and international standards. We also provide professional energy storage system installation and after‑sales support across Europe.