The famous University of Applied Sciences (HTW) in Berlin has recently studied the most efficient home storage system for photovoltaic systems. In this year’s photovoltaic energy storage test, Goodway’s hybrid inverters and high-voltage batteries once again stole the limelight.
As part of the “2021 Power Storage Inspection”, a total of 20 different storage systems with 5 kW and 10 kW power levels were inspected to determine the System Performance Index (SPI). The tested two GoodWe hybrid inverters GoodWe ET and GoodWe EH achieved system performance index (SPI) of 93.4% and 91.2%, respectively.
With this excellent system efficiency, GoodWe 5000-EH successfully won the second place in a smaller reference case (5MWh/a consumption, 5kWp PV). The performance of GoodWe 10k-ET is also very good, only 1.7 points away from the optimal placement system in the second reference case (electric vehicle and heat pump consumption is 10 MWh/a).
The System Performance Index (SPI) determined by HTW researchers is an economic indicator that shows how much electricity costs have been reduced by a tested storage system compared to an ideal storage system. The better the efficiency-related attributes (such as conversion efficiency, control speed, or standby consumption), the higher the cost savings achieved. The difference in cost can be determined with a high degree of accuracy.
Another focus of the research is the design of photovoltaic storage systems. The simulations and analysis performed show that, from an economic point of view, it is particularly important to determine the size of the photovoltaic system and storage system based on demand. The larger the photovoltaic system, the higher the excess carbon dioxide emissions.
Any suitable roof surface should be used to produce solar energy to increase self-sufficiency and reduce carbon dioxide emissions. The use of two tested GoodWe hybrid inverters 5000-EH and 10k-ET and a simple installation of photovoltaic storage systems not only bring a return to homeowners in terms of carbon dioxide emissions, but also financially, because they can Achieve balance of payments during the year.
GoodWe has the widest range of energy storage products on the market, covering single-phase, three-phase, high-voltage and low-voltage batteries. GoodWe has invested heavily in research and development of storage solutions for different application scenarios. In countries with high electricity prices, more and more homeowners are more willing to install hybrid inverters to maximize self-consumption. GoodWe’s backup function can ensure 24 hours stable power supply in extreme weather conditions. In the country
In places where the grid is unstable or in poor conditions, consumers will be affected by power outages. GoodWe Hybrid system is the best solution to provide stable uninterrupted power supply for residential and C&I market segments.
The three-phase hybrid inverter compatible with high-voltage batteries is a star product, which is very suitable for the European energy storage market. The ET series covers the power range of 5kW, 8kW and 10kW, allowing up to 10% overload to maximize power output, and provides uninterrupted power supply for inductive loads. The automatic switching time is less than 10 milliseconds. It can provide grid connection in the following situations Save when the grid is shut down or damaged, the grid is in a starting state and independent of off-grid.
GoodWe EH series is a single-phase grid-connected solar inverter, specially designed for high-voltage batteries. For users who want to finally obtain a complete energy storage solution, the inverter has a “battery ready” option; only need to purchase an activation code, EH can be easily upgraded to a complete ESS system. Communication cables are pre-wired, which greatly reduces installation time, and plug-and-play AC connectors also make operation and maintenance more convenient.
EH is compatible with high-voltage batteries (85-450V) and can automatically switch to standby mode within 0.01s (UPS level) to ensure uninterrupted critical loads. The inverter’s power deviation is less than 20W, designed to maximize self-consumption. In addition, it takes less than 9 seconds to switch from the grid to photovoltaics and power heavy loads, which helps users avoid obtaining expensive electricity from the grid.
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Post time: Jul-15-2021