Home energy storage: Difference between revisions
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{{Short description|Local type of energy storage}} |
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[[File:Tesla Powerwall Render.svg|thumb|A render of a type of home battery.]] |
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[[File:Tesla Powerwall in Kenya.jpg|thumb|upright|Home energy storage [[Tesla Powerwall]] 2]] |
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'''Home energy storage''' devices store [[electricity]] locally, for later consumption. Electrochemical [[energy storage]] products, also known as "'''Battery Energy Storage System'''" (or "'''BESS'''" for short), at their heart are [[rechargeable battery|rechargeable batteries]], typically based on [[lithium-ion battery|lithium-ion]] or [[VRLA battery|lead-acid]] controlled by computer with intelligent [[software]] to handle charging and discharging cycles. Companies are also developing smaller [[flow battery]] technology for home use. As a local [[energy storage]] technologies for home use, they are smaller relatives of battery-based [[grid energy storage]] and support the concept of [[distributed generation]]. When paired with on-site generation, they can virtually eliminate blackouts in an [[off-the-grid]] lifestyle. |
'''Home energy storage''' devices store [[electricity]] locally, for later consumption. Electrochemical [[energy storage]] products, also known as "'''Battery Energy Storage System'''" (or "'''BESS'''" for short), at their heart are [[rechargeable battery|rechargeable batteries]], typically based on [[lithium-ion battery|lithium-ion]] or [[VRLA battery|lead-acid]] controlled by computer with intelligent [[software]] to handle charging and discharging cycles. Companies are also developing smaller [[flow battery]] technology for home use. As a local [[energy storage]] technologies for home use, they are smaller relatives of battery-based [[grid energy storage]] and support the concept of [[distributed generation]]. When paired with on-site generation, they can virtually eliminate blackouts in an [[off-the-grid]] lifestyle. |
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==Operating modes== |
==Operating modes== |
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===On-site generation=== |
===On-site generation=== |
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The stored energy commonly originates from on-site [[photovoltaic system|solar photovoltaic]] panels, generated during daylight hours, and the stored electricity consumed after sundown, when domestic energy [[peak demand|demand peaks]] in homes unoccupied during the day. |
The stored energy commonly originates from on-site [[photovoltaic system|solar photovoltaic]] panels, generated during daylight hours, and the stored electricity consumed after sundown, when domestic energy [[peak demand|demand peaks]] in homes unoccupied during the day. [[Small wind turbine]]s are less common but still available for home use as a complement or alternative to solar panels. |
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[[Electric vehicles]] used during weekdays, needing recharging overnight, are a good fit{{cn|date=June 2019|reason=EV batteries are much bigger than home batteries}} with home energy storage in homes with solar panels and low daylight-hour electrical consumption. Electric vehicle manufacturers [[BMW]],<ref>{{cite web|last1=Moloughney|first1=Tom |title=BMW Announces Home Energy Storage System Utilizing i3 Battery Packs|url= https://cleantechnica.com/2016/06/22/bmw-announces-home-energy-storage-system-using-i3-battery-packs/ |website=cleantechnica|publisher=Sustainable Enterprises Media| |
[[Electric vehicles]] used during weekdays, needing recharging overnight, are a good fit{{cn|date=June 2019|reason=EV batteries are much bigger than home batteries}} with home energy storage in homes with solar panels and low daylight-hour electrical consumption. Electric vehicle manufacturers [[BMW]],<ref>{{cite web |last1=Moloughney |first1=Tom |title=BMW Announces Home Energy Storage System Utilizing i3 Battery Packs|url= https://cleantechnica.com/2016/06/22/bmw-announces-home-energy-storage-system-using-i3-battery-packs/ |website=cleantechnica|date=22 June 2016 |publisher=Sustainable Enterprises Media|access-date=7 March 2017}}</ref> [[BYD Company|BYD]],<ref>{{cite web|title=BYD unveils its B-BOX energy storage system in the uk|url=http://www.solarpowerportal.co.uk/news/byd_unveils_its_b_box_energy_storage_system_in_the_uk |website=Solar Power Portal |publisher=Henley Media |access-date=7 March 2017}}</ref> [[Nissan]]<ref>{{cite web |last1=Muoio |first1=Danielle |title=Nissan could rival Tesla with its new at-home battery |url= https://www.businessinsider.com/nissan-releases-xstorage-at-home-battery-2016-5?r=US&IR=T |website=Business Insider|publisher=[[Axel Springer SE|Axel Springer]]|access-date=13 March 2017}}</ref> and [[Tesla, Inc.|Tesla]] market own-brand home energy storage devices to their customers. By 2019, such devices had not followed the price reduction of automotive batteries.<ref>{{cite web |last1=Leitch |first1=David |title=Residential batteries are five times more expensive than electric car batteries |url=https://reneweconomy.com.au/residential-batteries-are-five-times-more-expensive-than-electric-car-batteries-40236/ |website=RenewEconomy |language=en-AU |date=3 June 2019 |access-date=17 December 2022}}</ref> |
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<!-- [[Mercedes-Benz]],<ref>{{cite web|last1=Spector|first1=Julian|title=Mercedes-Benz Launches a US Energy Storage Company|url=https://www.greentechmedia.com/articles/read/mercedes-benz-launches-a-u.s.-energy-storage-company|website=Greentech Media|publisher=[[Wood Mackenzie]]}}</ref> Mercedes left the business in 2018 --> |
<!-- [[Mercedes-Benz]],<ref>{{cite web |last1=Spector |first1=Julian |title=Mercedes-Benz Launches a US Energy Storage Company |url=https://www.greentechmedia.com/articles/read/mercedes-benz-launches-a-u.s.-energy-storage-company |website=Greentech Media |publisher=[[Wood Mackenzie]]}}</ref> Mercedes left the business in 2018 --> |
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Smart tariffs, stemming from the increasing prevalence of [[smart meters]], will increasingly be paired with home energy storage devices to exploit low off-peak prices, and avoid higher-priced energy at times of peak demand. |
Smart tariffs, stemming from the increasing prevalence of [[smart meters]], will increasingly be paired with home energy storage devices to exploit low off-peak prices, and avoid higher-priced energy at times of peak demand. |
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===Energy grid support=== |
===Energy grid support=== |
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Home energy storage devices, when connected to a server via the [[internet]], can theoretically be ordered to provide very short-term services to the energy grid:- |
Home energy storage devices, when connected to a server via the [[internet]], can theoretically be ordered to provide very short-term services to the energy grid:- |
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* Reduced peak hour demand stress - provision of short-term [[demand response]] during periods of peak demand reducing the need to inefficiently |
* Reduced peak hour demand stress - provision of short-term [[demand response]] during periods of peak demand reducing the need to inefficiently stand up short generation assets like [[diesel generators]]. |
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* Frequency correction - the provision of ultra short-term corrections, to keep [[utility frequency|mains frequency]] within the tolerances required by regulators (e.g., 50 Hz or 60 Hz +/- n%). |
* Frequency correction - the provision of ultra short-term corrections, to keep [[utility frequency|mains frequency]] within the tolerances required by regulators (e.g., 50 Hz or 60 Hz +/- n%). |
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Lithium-ion batteries, a popular choice due to their relatively high [[cycle durability|charge cycle]] and lack of [[memory effect]], are difficult to [[Recycling|recycle]]. |
Lithium-ion batteries, a popular choice due to their relatively high [[cycle durability|charge cycle]] and lack of [[memory effect]], are difficult to [[Recycling|recycle]]. |
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Lead-acid batteries are relatively easier to recycle and, due to the high resale value of the [[lead]], 99% of those sold in the US get recycled.<ref>{{cite web|title=Recycling Rate Study|url=http://batterycouncil.org/?RecylingStudy|publisher=Battery Council International (BCI)| |
Lead-acid batteries are relatively easier to recycle and, due to the high resale value of the [[lead]], 99% of those sold in the US get recycled.<ref>{{cite web |title=Recycling Rate Study |url=http://batterycouncil.org/?RecylingStudy |publisher=Battery Council International (BCI) |access-date=7 March 2017}}</ref> They have much shorter useful lives than a lithium-ion battery of a similar capacity, due to having a lower [[cycle durability|charge cycle]], narrowing the environmental-impact gap. In addition, lead is a [[toxic heavy metal]] and the [[sulfuric acid]] in the [[electrolyte]] has a high environmental impact. |
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====Second life for electric vehicle batteries==== |
====Second life for electric vehicle batteries==== |
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{{Main|Electric_vehicle_battery#Downcycling_of_end-of-life_EV_batteries}} |
{{Main|Electric_vehicle_battery#Downcycling_of_end-of-life_EV_batteries}} |
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To offset the environmental impact of batteries, some manufacturers extend the useful life of used batteries taken from electric vehicles at the point where the cells |
To offset the environmental impact of batteries, some manufacturers extend the useful life of used batteries taken from electric vehicles at the point where the cells will not sufficiently hold charge. Though considered end of life for electric vehicles, the batteries will function satisfactorily in home energy storage devices.<ref>{{cite journal |last1=Gaines |first1=Linda |title=The future of automotive lithium-ion battery recycling: Charting a sustainable course|journal=Sustainable Materials and Technologies|year=2014 |volume= 1–2 |issue=December 2014 |pages=2–7 |doi=10.1016/j.susmat.2014.10.001 |doi-access=free}}</ref> Manufacturers supporting this include Nissan,<ref>{{cite web|last1=Gibbs|first1=Nick|title=Nissan gives Leaf batteries a 'second life' as home energy storage units|url=http://europe.autonews.com/article/20160510/ANE/160519985/nissan-gives-leaf-batteries-a-second-life-as-home-energy-storage-units|website=Automotive News Europe|date=10 May 2016 |publisher=Crain Communications, Inc.|access-date=13 March 2017}}</ref> BMW<ref>{{cite web |last1=Pyper |first1=Julia |title=BMW Is Turning Used i3 Batteries Into Home Energy Storage Units |url=https://www.greentechmedia.com/articles/read/bmw-is-turning-used-i3-batteries-into-home-energy-storage-units |website=Greentech Media |publisher=[[Wood Mackenzie]] |access-date=13 March 2017}}</ref> and Powervault.<ref>{{cite web |title=Second Life Batteries for Domestic Electricity Storage - International Feasibility Study |url=http://gtr.rcuk.ac.uk/projects?ref=132553 |website=Gateway to Research |publisher=[[Research Councils UK]] |access-date=13 March 2017}}</ref> |
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====Salt water batteries==== |
====Salt water batteries==== |
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Home Energy Storage devices can be paired with [[Salt water battery|salt water batteries]], which have a lower environmental impact due to their lack of [[toxic heavy metal]] and ease of [[Recycling|recyclability]]. |
Home Energy Storage devices can be paired with [[Salt water battery|salt water batteries]], which have a lower environmental impact due to their lack of [[toxic heavy metal]] and ease of [[Recycling|recyclability]]. |
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Saltwater batteries are no longer being produced on a commercial level after the bankruptcy of [[Aquion Energy]] in March 2017. |
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==Alternatives or complement== |
==Alternatives or complement== |
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[[File:Cratzenbach, Modell Pumpspeicherkraftwerk.jpg|thumb|Pico |
[[File:Cratzenbach, Modell Pumpspeicherkraftwerk.jpg|thumb|Pico hydro]] |
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Using a [[pumped-storage hydroelectricity|pumped-storage]] system of [[cistern]]s for energy storage and small generators, [[pico hydro]] generation may also be effective for "closed loop" home energy generation systems.<ref name="sciencedaily">{{cite web | url= https://www.sciencedaily.com/releases/2016/10/161024090454.htm | archive-url= https://web.archive.org/web/20170510054924/https://www.sciencedaily.com/releases/2016/10/161024090454.htm | url-status= dead | archive-date= 2017-05-10 | title = Is energy storage via pumped hydro systems is possible on a very small scale? | |
Using a [[pumped-storage hydroelectricity|pumped-storage]] system of [[cistern]]s for energy storage and small generators, [[pico hydro]] generation may also be effective for "closed loop" home energy generation systems.<ref name="sciencedaily">{{cite web | url= https://www.sciencedaily.com/releases/2016/10/161024090454.htm | archive-url= https://web.archive.org/web/20170510054924/https://www.sciencedaily.com/releases/2016/10/161024090454.htm | url-status= dead | archive-date= 2017-05-10 | title = Is energy storage via pumped hydro systems is possible on a very small scale? |access-date= 6 September 2018 | website=Science Daily| date = 2016-10-24}}</ref><ref name="homepower">{{cite news | url= https://www.homepower.com/articles/microhydro-power/design-installation/microhydro-myths-misconceptions | title = Microhydro Myths & Misconceptions | access-date= 6 September 2018 | publisher=Home Power| date =December 2011 – January 2012 |last = Root | first = Ben|volume=146}}</ref> |
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A [[storage heater]] or heat bank (Australia) is an electrical [[heater]] which [[thermal energy storage|stores thermal energy]] during the evening, or at night when electricity is available at lower cost, and releases the heat during the day as required. |
A [[storage heater]] or heat bank (Australia) is an electrical [[heater]] which [[thermal energy storage|stores thermal energy]] during the evening, or at night when electricity is available at lower cost, and releases the heat during the day as required. |
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[[Accumulator (energy)|Accumulator]]s, like a [[Hot water storage tank]], are another type of storage heater but specifically store hot water for later use. |
[[Accumulator (energy)|Accumulator]]s, like a [[Hot water storage tank]], are another type of storage heater but specifically store hot water for later use. |
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Some systems may be portable<ref>{{Cite web |title=The EcoFlow Delta Pro Ultra is the home backup system we needed during a recent storm |url=https://www.zdnet.com/home-and-office/energy/the-ecoflow-delta-pro-ultra-is-the-home-backup-system-we-needed-during-a-recent-storm/ |access-date=2024-06-07 |website=ZDNET |language=en}}</ref> or partially portable<ref>{{Cite web |title=Mango Power Union |url=https://www.mangopower.com/pages/mango-power-union |access-date=2024-06-07 |website=Mango Power |language=en}}</ref> for easier transportation to another location, use during transportation or travel. |
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== See also== |
== See also== |
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** [[UltraBattery]] |
** [[UltraBattery]] |
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** [[Flow battery]] |
** [[Flow battery]] |
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* [[Vehicle-to-grid#Drawbacks|Criticism of vehicle-to-grid]] |
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* [[Distributed generation]] |
* [[Distributed generation]] |
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* [[ |
* [[Backfeeding]] |
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* [[Grid_energy_storage#Forms|Other forms of grid-energy storage]] |
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* [[Smart grid]] |
* [[Smart grid]] |
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* [[ |
* [[Energy storage as a service]] |
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* [[Uninterruptible power supply]] |
* [[Uninterruptible power supply]] |
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* [[Emergency power system]] |
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==References== |
==References== |
Revision as of 04:39, 13 August 2024
Home energy storage devices store electricity locally, for later consumption. Electrochemical energy storage products, also known as "Battery Energy Storage System" (or "BESS" for short), at their heart are rechargeable batteries, typically based on lithium-ion or lead-acid controlled by computer with intelligent software to handle charging and discharging cycles. Companies are also developing smaller flow battery technology for home use. As a local energy storage technologies for home use, they are smaller relatives of battery-based grid energy storage and support the concept of distributed generation. When paired with on-site generation, they can virtually eliminate blackouts in an off-the-grid lifestyle.
Operating modes
On-site generation
The stored energy commonly originates from on-site solar photovoltaic panels, generated during daylight hours, and the stored electricity consumed after sundown, when domestic energy demand peaks in homes unoccupied during the day. Small wind turbines are less common but still available for home use as a complement or alternative to solar panels.
Electric vehicles used during weekdays, needing recharging overnight, are a good fit[citation needed] with home energy storage in homes with solar panels and low daylight-hour electrical consumption. Electric vehicle manufacturers BMW,[1] BYD,[2] Nissan[3] and Tesla market own-brand home energy storage devices to their customers. By 2019, such devices had not followed the price reduction of automotive batteries.[4]
The units can also be programmed to exploit a differential tariff, that provide lower priced energy during hours of low demand - seven hours from 12:30am in the case of Britain's Economy 7 tariff - for consumption when prices are higher.
Smart tariffs, stemming from the increasing prevalence of smart meters, will increasingly be paired with home energy storage devices to exploit low off-peak prices, and avoid higher-priced energy at times of peak demand.
Advantages
Overcoming grid losses
Transmission of electrical power from power stations to population centres is inherently inefficient, due to transmission losses in electrical grids, particularly within power-hungry dense conurbations where power stations are harder to site. By allowing a greater proportion of on-site generated electricity to be consumed on-site, rather than exported to the energy grid, home energy storage devices can reduce the inefficiencies of grid transport.
Energy grid support
Home energy storage devices, when connected to a server via the internet, can theoretically be ordered to provide very short-term services to the energy grid:-
- Reduced peak hour demand stress - provision of short-term demand response during periods of peak demand reducing the need to inefficiently stand up short generation assets like diesel generators.
- Frequency correction - the provision of ultra short-term corrections, to keep mains frequency within the tolerances required by regulators (e.g., 50 Hz or 60 Hz +/- n%).
Reduced reliance on fossil fuels
Due to the above efficiencies, and their ability to boost the amount of solar energy consumed on-site, the devices reduce the amount of power generated using fossil fuels, namely natural gas, coal, oil and diesel.
Disadvantages
Environmental impact of batteries
Lithium-ion batteries, a popular choice due to their relatively high charge cycle and lack of memory effect, are difficult to recycle.
Lead-acid batteries are relatively easier to recycle and, due to the high resale value of the lead, 99% of those sold in the US get recycled.[5] They have much shorter useful lives than a lithium-ion battery of a similar capacity, due to having a lower charge cycle, narrowing the environmental-impact gap. In addition, lead is a toxic heavy metal and the sulfuric acid in the electrolyte has a high environmental impact.
Second life for electric vehicle batteries
To offset the environmental impact of batteries, some manufacturers extend the useful life of used batteries taken from electric vehicles at the point where the cells will not sufficiently hold charge. Though considered end of life for electric vehicles, the batteries will function satisfactorily in home energy storage devices.[6] Manufacturers supporting this include Nissan,[7] BMW[8] and Powervault.[9]
Salt water batteries
Home Energy Storage devices can be paired with salt water batteries, which have a lower environmental impact due to their lack of toxic heavy metal and ease of recyclability.
Saltwater batteries are no longer being produced on a commercial level after the bankruptcy of Aquion Energy in March 2017.
Alternatives or complement
Using a pumped-storage system of cisterns for energy storage and small generators, pico hydro generation may also be effective for "closed loop" home energy generation systems.[10][11]
A storage heater or heat bank (Australia) is an electrical heater which stores thermal energy during the evening, or at night when electricity is available at lower cost, and releases the heat during the day as required.
Accumulators, like a Hot water storage tank, are another type of storage heater but specifically store hot water for later use.
Some systems may be portable[12] or partially portable[13] for easier transportation to another location, use during transportation or travel.
See also
- Energy storage
- Criticism of vehicle-to-grid
- Distributed generation
- Backfeeding
- Other forms of grid-energy storage
- Smart grid
- Energy storage as a service
- Uninterruptible power supply
- Emergency power system
References
- ^ Moloughney, Tom (22 June 2016). "BMW Announces Home Energy Storage System Utilizing i3 Battery Packs". cleantechnica. Sustainable Enterprises Media. Retrieved 7 March 2017.
- ^ "BYD unveils its B-BOX energy storage system in the uk". Solar Power Portal. Henley Media. Retrieved 7 March 2017.
- ^ Muoio, Danielle. "Nissan could rival Tesla with its new at-home battery". Business Insider. Axel Springer. Retrieved 13 March 2017.
- ^ Leitch, David (3 June 2019). "Residential batteries are five times more expensive than electric car batteries". RenewEconomy. Retrieved 17 December 2022.
- ^ "Recycling Rate Study". Battery Council International (BCI). Retrieved 7 March 2017.
- ^ Gaines, Linda (2014). "The future of automotive lithium-ion battery recycling: Charting a sustainable course". Sustainable Materials and Technologies. 1–2 (December 2014): 2–7. doi:10.1016/j.susmat.2014.10.001.
- ^ Gibbs, Nick (10 May 2016). "Nissan gives Leaf batteries a 'second life' as home energy storage units". Automotive News Europe. Crain Communications, Inc. Retrieved 13 March 2017.
- ^ Pyper, Julia. "BMW Is Turning Used i3 Batteries Into Home Energy Storage Units". Greentech Media. Wood Mackenzie. Retrieved 13 March 2017.
- ^ "Second Life Batteries for Domestic Electricity Storage - International Feasibility Study". Gateway to Research. Research Councils UK. Retrieved 13 March 2017.
- ^ "Is energy storage via pumped hydro systems is possible on a very small scale?". Science Daily. 2016-10-24. Archived from the original on 2017-05-10. Retrieved 6 September 2018.
- ^ Root, Ben (December 2011 – January 2012). "Microhydro Myths & Misconceptions". Vol. 146. Home Power. Retrieved 6 September 2018.
- ^ "The EcoFlow Delta Pro Ultra is the home backup system we needed during a recent storm". ZDNET. Retrieved 2024-06-07.
- ^ "Mango Power Union". Mango Power. Retrieved 2024-06-07.