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Comment: Re:Why? (Score 1) 310

by Luckyo (#49619211) Attached to: Tesla's Household Battery: Costs, Prices, and Tradeoffs

You cannot blame people who have a significant incentive not to upgrade their hardware for fighting it. What you can do is put pressure from the other side to force it regardless as has been done across most of the Western countries now.

Considering that this forced many older plants to either go for full renovation of the boiler or closure, it's been a pretty hard fight for understandable reasons.

Comment: Re:Last Sentence... the point of this exercise. (Score 1) 310

by Luckyo (#49614209) Attached to: Tesla's Household Battery: Costs, Prices, and Tradeoffs

Citation please, considering that if this was even remotely close to being true, you're suggesting that all major telecom operators have fucked up in a major way, as main form of cell tower backup today is VRLA battery banks. If your capacity argument was anywhere near true, li-ion would have been long considered as operators are updating cell tower hardware very often and I have never heard li-ion being more than considered unless there was a specific need for it (i.e. weight restrictions on site). Reason is always the same - far too low capacity for cost.

Comment: Re:Another market overlooked (Score 1) 310

by Luckyo (#49614153) Attached to: Tesla's Household Battery: Costs, Prices, and Tradeoffs

Afaik (hearsay from a friend who is a professional electrician that among other things did electric wiring in large apartment building I used to live in) the main reason for this is costs. But that was often left to the electrician to decide on site in older buildings where building process was nowhere near as tightly degisned regulated (i.e. benefits of computerization of design process didn't exist yet).

Nowadays requirements tend to be tighter.

Comment: Re:Backup Generator replacement? Not so much (Score 1) 310

by Luckyo (#49614089) Attached to: Tesla's Household Battery: Costs, Prices, and Tradeoffs

Which point makes no sense to you? The fact that snow comes every year? That fact huge earthquakes occur approximately once a century? That due to relative energy density, a single tank of an average household sized backup generator will hold much more energy than a battery bank like one advertised in the story?

Comment: Re:Backup Generator replacement? Not so much (Score 1) 310

by Luckyo (#49612167) Attached to: Tesla's Household Battery: Costs, Prices, and Tradeoffs

Because snow happens for extended amounts of time every year in relevant regions which are huge, whereas huge earthquakes happen only at faultline regions and only once a century or so.

Also, "severing pipelines" on regional level doesn't really matter in case of earthquake for single household in case we're discussing. If you get severed connections from disaster, chances are that you either leave the region if roads are still operable and logistics work until basic damage control has been done by emergency services, or they are too damaged to allow you to leave and you're stuck and limited to what you have directly on site.

In which case, you likely have far more energy in a single tank of your ICE generator than in a battery bank.

Comment: Re:wow. 2 stories about Tesla/Musk (Score 1) 310

by Luckyo (#49611553) Attached to: Tesla's Household Battery: Costs, Prices, and Tradeoffs

Considering the existence of residential flooded cells and VRLA batteries for decades and the fact that they absolutely destroy these li-ion batteries in all relevant factors except weight, I'd say you're barking up the wrong tree.

It's more about "ignorant people that didn't know battery backup for residential and small business existed for decades and is far more efficient than these batteries" vs "people who know battery backup for residential and small business existed for decades and is far more efficient than these batteries".

Considering the fact that instead of actual hard numbers, initial release mostly focused on how pretty said batteries look, it's pretty obvious who they are going to be marketed towards however.

Comment: Re:So your house has no A/C? (Score 1) 310

by Luckyo (#49611523) Attached to: Tesla's Household Battery: Costs, Prices, and Tradeoffs

Sun's thermal radiation heats roof, thermal energy goes into attic though the roof, there is no active cooling in the attic other than the fan that kicks in at 43C.

That is how thermal energy works. Just because temperature in well ventilated shady area is 23C doesn't mean that it's going to be the same in well lit enclosed space.

Which incidentally is likely to be the site of battery installation.

Comment: Re:Lead Acid (Score 1) 310

by Luckyo (#49611485) Attached to: Tesla's Household Battery: Costs, Prices, and Tradeoffs

Factually incorrect on all accounts. VRLAs are sealed and do not discharge significant amount of H2 outside of the individual sealed cell. Lead wear and tear is also minimal in residential use as batteries can have far greater capacity (than say li-ion for the same cost).

Finally realistic discharge rate for lithium batteries is about the same as lead. The only way to hit the numbers you suggest is to have minimal discharge on li-ion, in which case acid-lead will likely be able to match them.

Which is why warranty for typical VRLA is the same one as Tesla is willing to give it's li-ion batteries - 10 years. With exchange costs being massively in favour of lead-acid.

Comment: Re:Uh, no. (Score 2) 310

by Luckyo (#49611423) Attached to: Tesla's Household Battery: Costs, Prices, and Tradeoffs

There are plenty of companies on the market that sell the entire systems with either VRLA and flooded cells, including the hook up and the inverter. Which is profitable not only because lead-acid absolutely destroys everything else in the market when you care about cost, capacity and safety but not weight, but also because control electronics for lead-acid are much cheaper than those needed for li-ion.

I don't want to achieve immortality through my work. I want to achieve immortality through not dying. -- Woody Allen

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