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  • Power-to-heat-to-power storage for rooftop PV
    Jun 11, 2020

    Researchers at the Polytechnic University of Madrid have examined the feasibility of storing power generated by rooftop solar as heat which can then be used to generate power when the sun isn’t shining – ‘power-to-heat-to-power storage,’ or PHPS technology. The household system in Madrid studied by the scientists included a highly efficient, thermally-driven heat pump and solar thermal collectors. The ‘trigeneration’ system, or combined cooling, heating and power (CCHP) technology includes two types of heat store: a low or medium-grade one for domestic hot water and space heating and a high-grade heat store for combined heat and power generation. The heat generated in the former can be used for cooling as well as heating demand. A reference case was based on grid power consumption plus an electrically-driven heat pump for cooling. Factors The Madrid group said factors including the cost of grid power and fuel and the price and productivity of PV arrays would influence the optimal size of trigeneration systems. The researchers estimated a €900-1,200/kW cost for PV systems and based their estimate of PHPS profitability on the resulting electricity savings. A domestic power-to-heat-to-power storage system could drive grid electricity savings of more than 70%, according to the researchers, but would require 12-15 years to pay for itself. “This holds true even when the heat-to-power conversion [efficiency] is moderately low (20-30%), provided that the economic conditions are favorable,” the researchers stated. The Madrid group conceded heat losses in the high-temperature thermal store would mean a PHPS system would mean a solar power self-consumption rate of only 40-60%. “Possible ways of minimizing these losses include the development of novel, ultra-dense heat stores at moderately low temperatures, or more advanced thermal insulation [systems],” added the researchers. The group’s findings are described in the study Techno-economic analysis of solar PV power-to-heat-to-power storage and trigeneration in the residential sector, published in Applied Energy and on the ScienceDirect website.

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  • Europe has potential for 21 GW of unsubsidized renewables
    Jun 11, 2020

    From pv magazine Germany. Interest in subsidy-free power purchase agreements (PPAs) for photovoltaic and wind power plants in Europe really took off last year – a development confirmed by an updated version of the Status Quo: Market Parity of PV and Onshore Wind in Europe report published by German consultancy Enervis Energy Advisors. Analysts who crunched the data from 25 nations calculated a 21 GW pipeline of projects was being developed without subsidy in Europe at the end of 2019. Spain continued to lead the way, according to the Enervis report, with 4.39 GW of unsubsidized-PPA-driven projects announced last year. Italy followed, with 1.91 GW, ahead of Germany, with 1.05 GW. Demand also rose, however, in Portugal (444 MW), Denmark (338 MW) and France (158 MW) and Enervis predicted southern European markets will continue to be fertile territory for subsidy-free solar PPAs despite bureaucratic hurdles. For wind farms – on and offshore – north and north west Europe continue to be the focus. Wholesale prices Although the historic rise in wholesale electric prices in the EU halted last year – and has plunged during Covid-19 shutdowns – Enervis noted solar and wind power could be generated for up to €20/MW cheaper than market prices. With the coal withdrawal plans announced by some European nations expected to buttress the wholesale energy price in the medium term, according to Enervis, ever cheaper solar and wind projects will continue to make subsidy-free PPAs an attractive option. The updated report states the renewables business case will stand up even in the face of gas prices which fell 39% in 2019, year-on-year, and dragged down the wholesale electricity price 16% despite a 56% annual rise in the cost of CO2 certificates. In terms of crowding out rival renewables technologies, instead of fossil fuels, the highest ‘cannibalization rate’ observed for solar last year was 12%, in Sicily. In Germany, onshore wind saw a 14% rate. Those rates could rise as renewables penetrate deeper into European grids, according to Enervis, which highlighted fluctuation in the price of fossil fuel-fired electricity as an unpredictable variable, which could be counterbalanced by higher CO2 prices; less baseload generation; and flexible demand and storage shoring up the energy price.

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  • SUNGROW has won the 500MW photovoltaic large order of Oman, supplying the maximum power of 1500V string inverter SG250HX
    May 19, 2020

    Recently, the Saudi energy navigation company ACWA Power completed the Oman IBRI two phase 500MW photovoltaic project financing, and once again launched a deep cooperation with the sun power, strong joint assistance to build the largest photovoltaic power station of Oman. ACWA power pays special attention to the application of the latest technology route in this project, which requires the maximum reduction of lcoe; at the same time, it also puts forward high standard requirements for the reliability of equipment, so as to cope with the problems of Oman tropical desert climate, such as windy sand, strong wind erosion and large temperature difference. After comprehensive consideration, all customers finally choose the world's largest power 1500V series inverter SG250HX. The world's largest single unit power + high capacity ratio, with the best system cost SG250HX sets up the benchmark of the world's largest single unit power string inverter. With the same power station capacity, the number of inverters, low-voltage switchgear, cables and other equipment can be reduced. It is estimated that the initial investment cost of 100MW power station can be reduced zero point zero two Yuan / W or more. In addition, with the industry's higher volume ratio, support 6.75MW Large sub array design, PLC communication, integrated PID protection and repair functions and other advantages further reduce lcoe. Intelligent air cooling + the highest level of protection, reliable operation in high temperature and strong sand environment High temperature and strong wind sand are the strong enemies of reliable operation of the inverter. SG250HX adopts IP66 protection and C5 level anti-corrosion of the whole machine, with high sealing performance, no invasion of wind sand and water vapor, and adaptive strong corrosion environment. By adopting the industry-leading intelligent air cooling and heat dissipation technology, it can realize 50 ℃ full load without derating, reliable operation for more than 25 years, and reduce the risk of future use. Especially suitable for high temperature, strong wind and sand, strong corrosion and other extremely harsh environment. Patent IV scanning makes operation and maintenance more efficient and labor-saving The extreme environment also increases the difficulty of operation and maintenance of large-scale power stations, while the traditional inspection is time-consuming and inefficient, often suffering from "misdiagnosis" and "missed diagnosis", which is difficult to meet the requirements. As early as 2013, sungrow power took the lead in obtaining patent IV scanning technology. Through the verification of T 220V real station, one key start the whole station detection, online intelligent identification of 17 kinds of faults, and 15 minutes to obtain the health diagnosis report of 200mwp components, active operation and maintenance, simple and efficient, effectively solve the "misdiagnosis" and "missed diagnosis" problems of large-scale power ...

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  • JASOLAR releases the third-generation 525W + high-power module product Deep Blue3.0, with a planned production capacity of 14GW
    May 18, 2020

    On May 18, 2020, at the global photovoltaic large-scale technology conference, CORIGY SOLAR Solar released the third-generation 525W + high-power module product Deep Blue3.0 for the first time to the world. This product realizes ultra-high power 525W, conventional version modules The efficiency can reach 21%. CORIGY SOLAR Solar's director and senior vice president Huang Xinming said in a speech at the conference that large-scale application depends on the rapid decline in the cost of photovoltaic power, and behind it is the huge investment and unremitting efforts of countless photovoltaic companies in technology research and development. The technological innovation of module products is the most effective way for photovoltaic module companies to achieve cost reduction and efficiency increase. Monocrystalline modules are basically increased by 10 watts per year, and the efficiency is increased by 0.59%. After 2018, the rate of component power increase began to accelerate. It is understood that the current JA SOLAR module has reached the mass production level of 450W +. At the meeting, Tang Kun, director of CORIGY SOLAR Solar Product Technology Department, introduced the company's latest ultra-efficient component Deep Blue3.0, which uses 180mm silicon wafers, based on percium high-efficiency battery technology, and uses PERCIUM + ultra-efficient single-crystal battery technology. Greatly improved battery efficiency. Tang Kun said that after applying 525W + high power components to the power station, the benefits will be obvious. Taking a 360MW power station in Dubai as an example, the project simulates the use of flat single-axis + double-sided components. The results show that the power station using 525W components brings about 7.34% reduction in the cost of electricity per kilowatt hour compared to 400W. According to reports, CORIGY SOLAR Deep Blue3.0 high-power modules will enter mass production in the third quarter of 2020, with a total capacity planning of 14GW by the end of 2021.

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  • German solar installers expect massive market contraction this year
    Apr 17, 2020

    The German PV market may see a strong drop in newly installed solar power this year, after registering growth of around 4 GW last year. This is the conclusion of a new survey by EuPD Research involving German solar installers. However, the main reason given for the anticipated slowdown is not the impact of the Covid-19 crisis, but legislation in the German renewable energy market. Although the German PV market continued to grow at a sustained pace over the first three months of this year, the survey has shown that over the course of the months to come, a strong decline in commercial and industrial PV installations is expected. This is mainly due to fears that the 52 GW cap will not be removed for the feed-in tariff scheme for solar installations up to 750 kW in size. For the rest of this year, installers expect a further increase in demand for small systems up to 10 kW in size, but they also believe there will be a decrease of 31% for larger commercial systems and even a 53% drop for industrial projects. This will have a particularly drastic impact on the PV market in Germany. According to EuPD Research analysts, commercial PV accounted for 1.1 GW of newly deployed capacity last year, while industrial installations reached around 1.7 GW. Political standstill The results of the survey clearly show that concerns about the 52 GW cap, rather than the impact of the coronavirus pandemic, could have a much stronger influence on the commercial and industrial segments. “The political standstill in the abolition of the solar cap is a further step toward the end of the German energy transition,” said Markus Hoehner, CEO of EuPD Research. He said that climate protection, as well as the coronavirus pandemic, should be accepted and treated as global challenges. Representatives of solar companies also expect this. “The tactical negotiation game within the coalition, which has been going on for months, can no longer continue on the back of the solar sector,” said Alexander Schütt, managing director of BayWa re Solar Energy Systems, adding that the abolition of the 52 GW cap could give businesses a long-term perspective. Peter Thiele, president of Sharp Energy Solutions Europe and a German Solar Industry Association board member, argued that the removal of the cap will be important for both the industry and medium-sized companies, as well as society. “The PV cap is choking off a domestic industry that is one of the growth engines of German industry and provides wages and bread for more than 100,000 people. Despite corona, our order books are full – we do not need any bailout packages from the politicians. We just require that they also keep their promises,” added Detlef Neuhaus, managing director of German manufacturer Solarwatt. The three companies and storage provider E3/DC cooperated with EuPD Research on the survey.

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  • Solar tiles for new and historic buildings
    Mar 30, 2020

    Swiss start-up Freesuns has developed solar tiles for building-integrated PV it claims can be used on historic as well as new buildings. Freesuns chief executive John Morello said the tiles can be sized to completely replace conventional roof tiles in fiber-reinforced concrete, with all three models able to potentially cover 100% of a roof surface, including on complex roof layouts. Every tile hosts an electrical safety circuit to help prevent fire-risk, the company said, adding the product is ultra-resistant as it is manufactured with double tempered glass. Standard Standard solution the Solaris Classic is a 525mm by 460mm tile which reportedly delivers 154 W per square meter. It costs CHF292 (€276), excluding VAT and Morello told pv magazine, “This value is just an indicative value as the price can change depending on the complexity of the project.” The tile – glossy black with silver lines – is said to be ideal for new-build or renovated structures as it offers a modern architecture style. Freesuns tiles are manufactured with double tempered glass. Image: Freesuns The Solaris Classic has been deployed on a 211m2 residential roof in Colombier, Switzerland, amounting to 28 kW of solar generation capacity and added 32 kW on a 240m2 residential roof in the municipality of Pully. Freesuns said another, 160m2 residential roof in Genolier boasted capacity of 24 kW. Black The Premium Black model is a 420mm by 400mm product with a slightly lower output of 136 W per square meter at a price of around CHF304/m2. The model is recommended for modern architecture and for the replacement of cement tile roofs. Heritage The Heritage product is the most expensive, at around CHF308/m2 and reportedly offers power output of 128 W/m2 from the same dimensions as the Premium Black product, although Morello said all three versions are available in smaller formats to ensure complete roof coverage as an option. Solar tiles installed on the roof of the Grand Chalet. Image: Freesuns The matt gray Heritage tile has no visible lines and could be used to replace slate-style roofs on historic buildings, according to its developer. The tiles were installed on a small house located in the 18th century Grand Chalet of Rossinière, one of the oldest chalets in Switzerland. “For such an important heritage property it was critical to preserve the historical context in the appearance of the roof so it remained sympathetic to the site,” Freesuns said. “It was also a challenge to convince the local authorities charged with protecting the heritage of the Grand Chalet to allow solar on the roof of this building.” The roof of the small house of the historical building now hosts 8 kW of PV capacity across 54/m2. The Heritage tile is also being used on a 168 kW project under development on a 1,200m2 roofspace at another historic building in Switzerland. Freesuns said the tiles come with a warranty which guarantees they will maintain 90% of power output after 10 years and more than 80% after ...

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Mainly made by galvanized steel, anodized aluminum and ZAM materials

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