Solar battery recharging center creates carbon neutral farm

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Cellstrom GmbH is constructing a solar power battery recharging center to create a carbon-neutral farm on the large olive and wine property of the ancient Castle of Monte Vibiano Vecchio, near the city of Perugia in the Umbria Region in the centre of Italy.

The solar power centre, built by Cellstrom, is a shed-sized box with 24 high-tech solar panels on the roof, housing a revolutionary liquid-based battery. The battery has an efficiency of up to 80%, which is improved for variable loads, and when it is in standby it is improved by utilizing a cascaded architecture and disconnectable inverter. The electrolyte alone has a very low self-discharge rate of 1% per year, and it can be used almost indefinitely.

Although charging is an endothermic process, the battery can be immediately recharged at high power — during which time the system can be cooled, even after a strenuous discharge. A cycle stability of more than 10,000 charge/discharges can be obtained by extracting 85% of the total capacity.

The lifetime of a battery lies between 10 and 20 years. The charging state and the consequent amount of the remaining energy of the battery can be measured exactly. Precise calculation of the remaining capacity enables maximum utilization of the energy that has been stored. A high supply security is guaranteed by remote observation of the state of charge, and the built-in controller can monitor every safety-critical parameter. In case of a breakdown, an alarm signal would be automatically sent to the central service centre. Utilizing the same channel, it is possible to conduct remote diagnoses and monitoring.

The new technology makes it possible to store solar energy for the first time. At present, electricity generated by the sun has to be used immediately. Depending on the amount of usage, the Cellstrom battery centre under construction in Monte Vibiano Vecchio can store solar-sourced electricity for up to three days. The Austrian company is working to extend such usage to 10 days or even more, enabling the overall agricultural activities within the property to continue operating also without sunlight.

It means that golf carts and electric bikes, already used inside the property, will become the first means of transport for farm workers, and workers will be able to charge up their vehicles at the battery centre.

The project is part of an experiment to cut the carbon-dioxide (CO2) emissions on the farm to zero starting in 2009. New renewables technologies have been installed and applied to the property, including electric vehicles, miniature tractors using a new generation of biofuels, boilers used to create heat in the olive oil production process, wood chips instead of methane gas, a plantation of 10,000 trees to soak up and offset any unforeseen CO2 emissions, and sun-reflecting paint on storage buildings and tanks to cut the effects of global warming.

Key investments have been made by the property's owners, and they are expected to turn into profit in about five years, said Lorenzo Fasola Bologna, Vibiano Vecchio's Chef Executive Officer. The total cost of ownership, calculated over the lifetime of the flow battery, is comparatively small. Cellstrom estimates that the farm will be able to save up to 4,500 litres of petrol per year and decrease CO2 emissions by 10 tons.

Cellstrom, founded in 2000, sells solutions for its revolutionary FB10/100 energy storage system, a vanadium redox flow battery associated with power electronics in weatherproof housing. The battery, suitable for use with renewable energy sources, is manufactured at one of the two Cellstrom sites near Vienna in Brunn am Gebirge, where the company's production and sales are based. The vanadium redox flow battery is technologically an optimum mixture of environmental acceptability, performance, lifetime, energy density and robustness.

A solar battery is designed for use with an off-grid photovoltaic installation, including at least a photovoltaic panel, battery charger, solar battery and load. If the load requires an alternating current source, an inverter will also be required to transform the battery's direct current. In practice, a diesel generator, wind turbine or fuel cell may also be added.

To date, the term "solar battery" refers almost exclusively to lead-acid batteries designed for this purpose, although nickel-cadmium batteries can be also used in some cases.

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Germany launches second wind-solar tender

Germany's Joint Onshore Wind and Solar Tender invites 200 MW bids in an EEG auction, with PV and onshore wind competing on price per MWh, including grid integration costs and network fees under BNA rules.

 

Key Points

A BNA-run 200 MW EEG auction where PV and onshore wind compete on price per MWh, including grid integration costs.

✅ 200 MW cap; minimum project size 750 kW

✅ Max subsidy 87.50 per MWh; bids include network costs

✅ Solar capped at 10-20 MW; wind requires prior approval

 

Germany's Federal Network Agency (BNA) has launched its second joint onshore wind and solar photovoltaic (PV) tender, with a total capacity of 200 MW.

A maximum guaranteed subsidy payment has been set at 87.50 per MWh for both energy sources, which BNA says will have to compete against each other for the lowest price of electricity. According to auction rules, all projects must have a minimum of 750 kW.

The auction is due to be completed on 2 November.

The network regulator has capped solar projects at 10 MW, though this has been extended to 20 MW in some districts, amid calls to remove barriers to PV at the federal level. Onshore wind projects did not receive any such restrictions, though they require approval from Federal Immission Control three weeks prior to the bid date of 11 Octobe

Bids also require network and system integration costs to be included, and similar solicitations have been heavily subscribed, as an over-subscribed Duke Energy solar solicitation in the US market illustrates.

According to Germanys Renewable Energy Act (EEG), two joint onshore wind and solar auctions must take place each year between 2018 and 2021. After this, the government will review the scheme and decide whether to continue it beyond 2021.

The first tender, conducted in April, saw the entire 200 MW capacity given to solar PV projects, reflecting a broader solar power boost in Germany during the energy crisis. Of the 32 contracts awarded, value varied from 39.60 per MWh to 57.60 per MWh. Among the winning bids were five projects in agricultural and grassland sites in Bavaria, totalling 31 MW, and three in Baden-Wrttemberg at 17 MW.

According to the Agency, the joint tender scheme was initiated in an attempt to determine the financial support requirements for wind and solar in technology-specific auctions, however, solar powers sole win in the April auction meant it was met with criticism, even as clean energy accounts for 50% of Germany's electricity today.

The heads of the Federal Solar Industry Association (BSW-Solar) and German Wind Energy Association (BWE) saying the joint tender scheme is unsuitable for the build-out of the two technologies.

A BWE spokesman previously stressed the companys rejection of competition between wind and solar, saying: It is not clear how this could contribute to an economically meaningful balanced energy mix,

Technologies that are in various stages of development must not enter into direct competition with each other. Otherwise, innovation and development potential will be compromised.

Similarly, BSW-Solar president Carsten Krnig said: We are happy for the many solar winners, but consider the experiment a failure. The auction results prove the excellent price-performance ratio of new solar power plants, as solar-plus-storage is cheaper than conventional power in Germany, but not the suitability of joint tenders.

 

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Why the Texas Power Grid Is Facing Another Crisis

Texas Power Grid Reliability faces record peak demand as ERCOT balances renewable energy, wind and solar variability, gas-fired generation, demand response, and transmission limits to prevent blackouts during heat waves and extreme weather.

 

Key Points

Texas Power Grid Reliability is ERCOT's capacity to meet peak demand with diverse resources while limiting outages.

✅ Record heat drives peak demand across ERCOT.

✅ Variable wind/solar need firm, flexible capacity.

✅ Demand response and reserves reduce blackout risk.

 

The electric power grid in Texas, which collapsed dramatically during the 2021 winter storm across the state, is being tested again as the state suffers unusually hot summer weather. Demand for electricity has reached new records at a time of rapid change in the mix of power sources as wind and solar ramp up. That’s feeding a debate about the dependability of the state’s power. 

1. Why is the Texas grid under threat again? 

Already the biggest power user in the nation, electricity use in the second most-populous state surged to record levels during heat waves this summer. The jump in demand comes as the state becomes more dependent on intermittent renewable power sources, raising concerns among some critics that more reliance on wind and solar will leave the grid more vulnerable to disruption. Green sources will produce almost 40% of the power in Texas this year, US Energy Information Administration data show. While that trails California’s 52%, Texas is a bigger market. It’s already No. 1 in wind, making it the largest clean energy market in the US. 

2. How is Texas unique? 

The spirit of defiance of the Lone Star State extends to its power grid as well. The Electric Reliability Council of Texas, or Ercot as the grid operator is known, serves about 90% of the state’s electricity needs and has very few high-voltage transmission lines connecting to nearby grids. It’s a deliberate move to avoid federal oversight of the power market. That means Texas has to be mainly self-reliant and cannot depend on neighbors during extreme conditions. That vulnerability is a dramatic twist for a state that’s also the energy capital of the US, thanks to vast oil and natural gas producing fields. Favorable regulations are also driving a wind and solar boom in Texas. 

3. Why the worry? 

The summer of 2023 will mark the first time all of the state’s needs cannot be met by traditional power plants, like nuclear, coal and gas. A sign of potential trouble came on June 20 when state officials urged residents to conserve power because of low supplies from wind farms and unexpected closures of fossil-fuel generators amid supply-chain constraints that limited availability. As of late July, the grid was holding up, thanks to the help of renewable sources. Solar generation has been coming in close to expected summer capacity, or exceeding it on most days. This has helped offset the hours in the middle of the day when wind speeds died down in West Texas. 

4. Why didn’t the grid’s problems get fixed? 

There is no easy fix. The Texas system allows the price of electricity to swing to match supply and demand. That means high prices — and high profits — drive the development of new power plants. At times spot power prices have been as low as $20-$50 a megawatt-hour versus more than $4,000 during periods of stress. The limitation of this pricing structure was laid bare by the 2021 winter blackouts. Since then, state lawmakers have passed market reforms that require weatherization of critical infrastructure and changed rules to put more money in the pockets of the owners of power generation.  

5. What’s the big challenge? 

There’s a real clash going on over what the grid of the future should look like in Texas and across the country, especially as severe heat raises blackout risks nationally. The challenge is to make sure nuclear and fossil fuel plants that are needed right now don’t retire too early and still allow newer, cleaner technologies to flourish. Some conservative Republicans have blamed renewable energy for destabilizing the grid and have pushed for more fossil-fuel powered generators. Lawmakers passed a controversial $10 billion program providing low-interest loans and grants to build new gas-fired plants using taxpayer money, but Texans ultimately have to vote on the subsidy. 


6. Why do improvements take so long? 

Figuring out how to keep the lights on without overburdening consumers is becoming a greater challenge amid more extreme weather fueled by climate change. As such, changing the rules is often a hotly contested process pitting utilities, generators, manufacturers, electricity retailers and other groups against one another. The process became more politicized after the storm in 2021 with Republican Gov. Greg Abbott and lawmakers ordering Ercot to make changes. Building more transmission lines and connecting to other states can help, but such projects are typically tied up for years in red tape.

7. What can be done? 

The price cap for electricity was cut from $9,000/MWh to $5,000 to help avoid the punitive costs seen in the 2021 storm, though prices are allowed to spike more easily. Ercot is also contracting for more reserves to be online to help avoid supply shortfalls and improve reliability for customers, which added $1.7 billion in consumer costs alone last year. Another rule helps some gas generators pay for their fuel costs, while a more recent reform put in price floors when reserves fall to certain levels. Many power experts say that the easiest solution is to pay people to reduce their energy consumption during times of grid stress through so-called demand response programs. Factories, Bitcoin miners and other large users are already compensated to conserve during tight grid conditions.

 

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Hydro One Q2 profit plunges 23% as electricity revenue falls, costs rise

Hydro One Q2 Earnings show lower net income and EPS as mild weather curbed electricity demand; revenue missed Refinitiv estimates, while tree-trimming costs rose and the dividend remained unchanged for Ontario's grid operator.

 

Key Points

Hydro One Q2 earnings fell to $155M, EPS $0.26, revenue $1.41B; costs rose, demand eased, dividend held at $0.2415.

✅ Net income $155M; EPS $0.26 vs $0.34 prior year

✅ Revenue $1.41B; missed $1.44B estimate

✅ Dividend steady at $0.2415 per share

 

Hydro One Ltd.'s (H.TO 0.25%) second-quarter profit fell by nearly 23 per cent from last year to $155 million as the electricity utility reported spending more on tree-trimming work due to milder temperatures that also saw customers using less power, notwithstanding other periods where a one-time court ruling gain shaped quarterly results.

The Toronto-based company - which operates most of Ontario's power grid - and whose regulated rates are subject to an OEB decision, says its net earnings attributable to shareholders dropped to 26 cents per share from 34 cents per share when Hydro One had $200 million in net income.

Adjusted net income was also 26 cents per share, down from 33 cents per diluted share in the second quarter of 2018, while executive pay, including the CEO salary, drew public scrutiny during the period.

Revenue was $1.41 billion, down from $1.48 billion, while revenue net of purchased power was $760 million, down from $803 million, and across the sector, Manitoba Hydro's debt has surged as well.

Separately, Ontario introduced a subsidized hydro plan and tax breaks to support economic recovery from COVID-19, which could influence consumption patterns.

Analysts had estimated $1.44 billion of revenue and 27 cents per share of adjusted income, and some investors cite too many unknowns in evaluating the stock, according to financial markets data firm Refinitiv.

The publicly traded company, which saw a share-price drop after leadership changes and of which the Ontario government is the largest shareholder, says its quarterly dividend will remain at 24.15 cents per share for its next payment to shareholders in September.

 

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Electricity in Spain is 682.65% more expensive than the same day in 2020

Spain Electricity Prices surge to record highs as the wholesale market hits €339.84/MWh, driven by gas costs and CO2 permits, impacting PVPC regulated tariffs, free-market contracts, and household energy bills, OMIE data show.

 

Key Points

Rates in Spain's wholesale market that shape PVPC tariffs and free-market bills, moving with gas prices and CO2 costs.

✅ Record €339.84/MWh; peak 20:00-21:00; low 04:00-05:00 (OMIE).

✅ PVPC users and free-market contracts face higher bills.

✅ Drivers: high gas prices and rising CO2 emission rights.

 

Electricity in Spain's wholesale market will rise in price once more as European electricity prices continue to surge. Once again, it will set a historical record in Spain, reaching €339.84/MWh. With this figure, it is already the fifth time that the threshold of €300 has been exceeded.

This new high is a 6.32 per cent increase on today’s average price of €319.63/MWh, which is also a historic record, while Germany's power prices nearly doubled over the past year. Monday’s energy price will make it 682.65 per cent higher than the corresponding date in 2020, when the average was €43.42.

According to data published by the Iberian Energy Market Operator (OMIE), Monday’s maximum will be between the hours of 8pm and 9pm, reaching €375/MWh, a pattern echoed by markets where Electric Ireland price hikes reflect wholesale volatility. The cheapest will be from 4am to 5am, at €267.99.

The prices of the ‘pool’ have a direct effect on the regulated tariff  – PVPC – to which almost 11 million consumers in the country are connected, and serve as a reference for the other 17 million who have contracted their supply in the free market, where rolling back prices is proving difficult across Europe.

These spiraling prices in recent months, which have fueled EU energy inflation, are being blamed on high gas prices in the markets, and carbon dioxide (CO2) emission rights, both of which reached record highs this year.

According to an analysis by Facua-Consumidores en Acción, if the same rates were maintained for the rest of the month, the last invoice of the year would reach €134.45 for the average user. That would be 94.1 per cent above the €69.28 for December 2020, while U.S. residential electricity bills rose about 5% in 2022 after inflation adjustments.

The average user’s bill so far this year has increased by 15.1 per cent compared to 2018, as US electricity prices posted their largest jump in 41 years. Thus, compared to the €77.18 of three years ago, the average monthly bill now reaches €90.87 euros. However, the Government continues to insist that this year households will end up paying the same as in 2018.

As Ruben Sanchez, the general secretary of Facua commented, “The electricity bill for December would have to be negative for President Sanchez, and Minister Ribera, to fulfill their promise that this year consumers will pay the same as in 2018 once the CPI has been discounted”.

 

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Ontario Providing Electricity Relief to Families, Small Businesses and Farms During COVID-19

Ontario TOU Electricity Rate Relief offers 24/7 fixed off-peak pricing at 10.1¢/kWh, suspending time-of-use tiers to support residential customers, small businesses, and farms, coordinated by the Ontario Energy Board during COVID-19.

 

Key Points

A 45-day policy fixing TOU power at 10.1¢/kWh 24/7 off-peak to ease costs for residents, small businesses, and farms.

✅ Applies 24/7 off-peak 10.1¢/kWh to all TOU electricity customers.

✅ Automatic bill credit; no application or enrollment required.

✅ Covers residential, small businesses, and farms; OEB coordination.

 

To support Ontarians through the rapidly evolving COVID-19 situation, the Government of Ontario is providing immediate electricity rate relief for families, small businesses and farms paying time-of-use (TOU) rates.

For a 45-day period, the government is working to suspend time-of-use electricity rates, holding electricity prices to the off-peak rate of 10.1 cents-per-kilowatt-hour. This reduced price will be available 24 hours per day, seven days a week to all time-of-use customers, who make up the majority of electricity consumers in the province. By switching to a fixed off-peak rate, time-of-use customers will see rate reductions of over 50 per cent compared to on-peak rates now in effect.

To deliver savings as quickly and conveniently as possible, this discount will be applied automatically to electricity bills without the need for customers to fill out an application form.

"During this unprecedented time, we are providing much-needed relief to Ontarians, specifically helping those who are doing the right thing by staying home and small businesses that have closed or are seeing fewer customers," said Premier Doug Ford. "By adopting a fixed, 24/7 off-peak rate, aligned with ultra-low overnight pricing options, we are making things a little easier during these difficult times and putting more money in people's pockets for other important priorities and necessities."

The Government of Ontario issued an Emergency Order under the Emergency Management and Civil Protection Act to apply the off-peak TOU electricity rate for residential, small businesses, and farm customers who currently pay TOU rates.

"Ontario is fortunate to have a strong electricity system we can rely on during these exceptional times, even as Ottawa's electricity consumption decreased during the pandemic, and our government is proud to provide additional relief to Ontarians who are doing their part to stay home," said Greg Rickford, Minister of Energy, Northern Development and Mines.

"We thank the Ontario Energy Board and our partners at local distribution companies across the province, including initiatives like Hydro One's Ultra-Low Overnight Price Plan that support customers, for taking quick action to make this change and provide immediate support for hardworking people of Ontario," said Bill Walker, Associate Minister of Energy.

Visit Ontario's website to learn more about how the province continues to protect Ontarians from COVID-19.

Quick Facts

  • The Ontario Energy Board sets time-of-use electricity rates for residential and small business customers through the Regulated Price Plan, and provides stable electricity pricing for industrial and commercial companies through separate programs.
  • Time-of-use prices as of November, 2019 ― Off-Peak: 10.1₵/kWh, Mid-Peak: 14.4₵/kWh, On-Peak: 20.8₵/kWh
  • Depending on billing cycles, some customers will see these changes on their next electricity bill. TOU customers whose billing cycle ended before their local distribution company implemented this change will receive the reduced rate as a credit on a future bill.
  • The Ontario Electricity Rebate (OER) will continue to provide a 31.8 per cent rebate on the sub-total bill amount for all existing Regulated Price Plan (RPP) consumers.
  • There are approximately five million residential consumers, farms and some small businesses billed using time-of-use (TOU) electricity prices under the RPP.
  • The Ontario Energy Board has extended the winter ban on disconnections to July 31st.

 

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Wind Power Surges in U.S. Electricity Mix

U.S. Wind Power 2025 drives record capacity additions, with FERC data showing robust renewable energy growth, IRA incentives, onshore and offshore projects, utility-scale generation, grid integration, and manufacturing investment boosting clean electricity across key states.

 

Key Points

Overview of record wind additions, IRA incentives, and grid expansion defining the U.S. clean electricity mix in 2025.

✅ FERC: 30.1% of new U.S. capacity in Jan 2025 from wind

✅ Major projects: Cedar Springs IV, Boswell, Prosperity, Golden Hills

✅ IRA incentives drive onshore, offshore builds and manufacturing

 

In early 2025, wind power has significantly strengthened its position in the United States' electricity generation portfolio. According to data from the Federal Energy Regulatory Commission (FERC), wind energy accounted for 30.1% of the new electricity capacity added in January 2025, and as the most-used renewable source in the U.S., it also surpassed the previous record set in 2024. This growth is attributed to substantial projects such as the 390.4 MW Cedar Springs Wind IV and the 330.0 MW Boswell Wind Farm in Wyoming, along with the 300.0 MW Prosperity Wind Farm in Illinois and the 201.0 MW Golden Hills Wind Farm Expansion in Oregon. 

The expansion of wind energy capacity is part of a broader trend where solar and wind together accounted for over 98% of the new electricity generation capacity added in the U.S. in January 2025. This surge is further supported by the federal government's Inflation Reduction Act (IRA) and broader policy support for renewables, which has bolstered incentives for renewable energy projects, leading to increased investments and the establishment of new manufacturing facilities. 

By April 2025, clean electricity sources, including wind and solar, were projected to surpass 51% of total utility-scale electricity generation in the U.S., building on a 25.5% renewable share seen in recent data, marking a significant milestone in the nation's energy transition. This achievement is attributed to a combination of factors: a seasonal drop in electricity demand during the spring shoulder season, increased wind speeds in key areas like Texas, and higher solar production due to longer daylight hours and expanded capacity in states such as California, Arizona, and Nevada, supported by record installations across the solar and storage industry. 

Despite a 7% decline in wind power production in early April compared to the same period in 2024—primarily due to weaker wind speeds in regions like Texas—the overall contribution of wind energy remained robust, supported by an 82% clean-energy pipeline that includes wind, solar, and batteries. This resilience underscores the growing reliability of wind power as a cornerstone of the U.S. electricity mix. 

Looking ahead, the U.S. Department of Energy projects that wind energy capacity will continue to grow, with expectations of adding between 7.3 GW and 9.9 GW in 2024, and potentially increasing to 14.5 GW to 24.8 GW by 2028. This growth is anticipated to be driven by both onshore and offshore wind projects, with onshore wind representing the majority of new additions, continuing a trajectory since surpassing hydro capacity in 2016 in the U.S.

Early 2025 has witnessed a notable increase in wind power's share of the U.S. electricity generation mix. This trend reflects the nation's ongoing commitment to expanding renewable energy sources, especially after renewables surpassed coal in 2022, supported by favorable policies and technological advancements. As the U.S. continues to invest in and develop wind energy infrastructure, the role of wind power in achieving a cleaner and more sustainable energy future becomes increasingly pivotal.

 

 

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