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Video: Expert advice: save energy
So that you keep an overview in the jungle of technology and numbers: How to find the right photovoltaic system for your needs.
“If you want to use the electricity from your private photovoltaic system yourself, you need a memory.
Size The storage capacity required depends on the power consumption. For most four-person households, an energy content of 4 to 5 kWh is the most economical. This enables a self-sufficiency rate of around 70 or 80 percent. If heating or water heating is carried out electronically, the storage tank should be larger.
Technology The trend is towards lithium-ion storage. Lead batteries are currently cheaper, but the lower life expectancy eats up the price advantage after a few years.
Falling prices A system with lithium-ion batteries costs a family of four 6, 000–15, 000 euros. But prices are falling rapidly. The own power supply should be a really good deal in the future.
Funding The KfW funding program 275 for electricity storage offers a further incentive to invest: with a cheap loan and a repayment subsidy of up to 30 percent of the battery costs.
Innovations At the Munich Intersolar fair (June 10-12, 2015), products are presented that combine high standards with an attractive price. Buyers make sure that the safety guidelines for lithium storage, which were introduced at the end of 2014 and are certified by TÜV or VDE, are complied with.”
In this post you read:
- Produce electricity yourself
- Save energy
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