Hugh Piggott 的电池观点

电网里的电池
『以下是Hugh Piggott视角原文的翻译』

原文： http://scoraigwind.co.uk/2015/07/battery-storage-on-the-grid/

我的朋友Ian Woofenden讨论了电池在电网中的作用

*** 特斯拉电池的观点 Tesla Battery Perspective***

• 大量讨论围绕特斯拉电池平地而起。我的意见和倾向是和30多年的脱离电网生活有关，可再生能源和相关技术的工业进展起到了很大影响。有很多可以说，但总结如下：
  ** 问题只是电池。脱离了电网的人们用了几十年电池。那不是奇迹，实际上电池就是可再生能源系统中最大的问题部分, 如果你能避免电池，建议你就那么做！**

** 电池是一种系统负荷。电池效率并非100%并且有长期损耗。添加电池提高系统负荷（还提高成本）。假如你的网络没有电池，将是最高效且环保的可再生能源系统。如果你需要电池（脱离电网或者应急），我建议你将电池做的尽量小，将更多资源投入到生产。不担心重金属和替换品。*
** It’s not a real product until it has a price tag, a warranty, and a track record.*
** Early specs on the product make me scratch my head about whether the engineers even looked at the current renewable energy technology and how their product might interface with existing systems and gear.*
** If the grid needs more storage, it is not your problem. Let the utilities solve that issue; they have a sweetheart deal with a profit-guaranteed monopoly – they can figure out any real storage problems. If you think you need storage personally, ask yourself the hard questions — how often and how long do you actually have utility outages, and do you really have critical loads?*
** Perhaps the biggest drawback of the media focus on this prospective product is that people will get distracted from a true star of the renewable energy show — photovoltaics. Solar-electric modules are warranted for 25 years of energy production, and just sit on your roof or in your yard making electricity for you. They are ultra reliable, almost maintenance free, and will last longer than many of you reading this will live. My first modules went on the roof above me in 1984 and are still making clean electricity for my homestead.*
** Perhaps the biggest benefit of the Tesla hoopla is that people will start thinking harder about renewable energy. Once they realize that this product is not magic, is expensive, and in itself really does very little for the average homeowner, they might start to ask smarter questions and make better energy decisions. Reputable and experienced renewable energy dealers and consultants are getting plenty of inquiries due to the Tesla hype; the wise ones are using the opportunity to help people understand the practical and cost-effective ways to achieve their energy goals. There is no silver bullet that can solve your energy problems quickly, easily, or cheaply.*
Ian’s website is here.
In the United States (where Ian lives) they often have a Net Metering arrangement where the electricity they export to the grid is credited at the same value as what they use. This reduces the incentive for storage. But even when the exports are “lost”, as in “not credited to the householder”, there is not a big financial case for using a battery. The latest new battery announced in the UK for example (article here) stores only a couple of kW hours. Even if used to the full every day this would earn less than £100 over a whole year. Batteries are expensive and they only last a few years. Let’s focus on making renewable energy and investing in the equipment that makes the energy.