Hello everyone,
I am currently planning to install a Caterva Solar system (21 kW battery storage) for my new single-family house, which also provides grid balancing services through Caterva.
Unfortunately, I couldn’t find any results using the search function, so I would like to know if anyone here has experience with this or has received advice on it?
Thank you very much for your feedback.
I am currently planning to install a Caterva Solar system (21 kW battery storage) for my new single-family house, which also provides grid balancing services through Caterva.
Unfortunately, I couldn’t find any results using the search function, so I would like to know if anyone here has experience with this or has received advice on it?
Thank you very much for your feedback.
I would also like to share my opinion on the topic of electric cars and energy storage. After driving an electric car for a year, I have now received my utility bill, and it looks like driving 12,000 km (7,456 miles) has cost me about 315€ in electricity over the year. So please don’t be misled, especially when it comes to electric cars combined with energy storage systems. Even if you manage to charge your car 100% using photovoltaic panels and storage, your monthly grid electricity consumption would only decrease by less than 30€ per month.
R
Ronald Voigt12 Aug 2018 22:34I spent what felt like two hours reading through all the posts here and would like to briefly share my opinion on the payback period.
But first, a quick note on physics: electric power is measured in watts, and capacity (amount of electricity) is therefore expressed as power multiplied by time, in watt-hours (Wh). For the systems and storage discussed here, we are talking about kilowatts (kW) and kilowatt-hours (kWh). Please keep this accurate—we are not Angela Merkel, who talks about energy “generation.” That bothers me because every schoolchild learns in grade 5 that energy is never generated, but only converted.
Back to the topic: Since I am an environmentalist, I think electricity storage is a great idea, aside from the fact that enormous amounts of valuable materials are used in these systems. Large pumped-storage hydroelectric plants are more environmentally sound! From an economic standpoint, it's even less favorable. As the operator of two small photovoltaic systems and a mini combined heat and power unit, I have ideal conditions to charge and discharge the battery almost continuously—at least 300 days per year. Assuming a 10 kWh (10 kilowatt-hour) battery, I could store 1700 kWh (1700 kilowatt-hours) annually, and at 90% efficiency, use about 1530 kWh (1530 kilowatt-hours) again.
The difference between feed-in tariff of around 12 cents and electricity purchase cost of about 23 cents net (I am a commercial user) amounts to 168.30 euros. Assuming the battery lasts 20 years, or 6000 charge cycles, I would save 3366 euros. For a private user, who typically settles accounts including VAT and might be able to use a larger storage capacity, a few more euros could be added. But from a business perspective, the investment costs should not exceed the savings—that’s how I see it.
But first, a quick note on physics: electric power is measured in watts, and capacity (amount of electricity) is therefore expressed as power multiplied by time, in watt-hours (Wh). For the systems and storage discussed here, we are talking about kilowatts (kW) and kilowatt-hours (kWh). Please keep this accurate—we are not Angela Merkel, who talks about energy “generation.” That bothers me because every schoolchild learns in grade 5 that energy is never generated, but only converted.
Back to the topic: Since I am an environmentalist, I think electricity storage is a great idea, aside from the fact that enormous amounts of valuable materials are used in these systems. Large pumped-storage hydroelectric plants are more environmentally sound! From an economic standpoint, it's even less favorable. As the operator of two small photovoltaic systems and a mini combined heat and power unit, I have ideal conditions to charge and discharge the battery almost continuously—at least 300 days per year. Assuming a 10 kWh (10 kilowatt-hour) battery, I could store 1700 kWh (1700 kilowatt-hours) annually, and at 90% efficiency, use about 1530 kWh (1530 kilowatt-hours) again.
The difference between feed-in tariff of around 12 cents and electricity purchase cost of about 23 cents net (I am a commercial user) amounts to 168.30 euros. Assuming the battery lasts 20 years, or 6000 charge cycles, I would save 3366 euros. For a private user, who typically settles accounts including VAT and might be able to use a larger storage capacity, a few more euros could be added. But from a business perspective, the investment costs should not exceed the savings—that’s how I see it.
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