Please create an account to participate in the Slashdot moderation system

 



Forgot your password?
typodupeerror

Comment: Re:Solar rarely enough for the whole house (Score 1) 123

by ShanghaiBill (#49550963) Attached to: Tesla To Announce Battery-Based Energy Storage For Homes

They do that already with pumped-storage.

Pumped storage has an RTE (round-trip-efficiency) of about 80%. Modern li-ion batteries are over 90%. Pumped storage requires very specific geography (two reservoirs separated by a hill). Batteries will work anywhere.

There are also some liquid batteries.

The most common "flow" batteries are based on vanadium redox, and have an RTE of 65-75%.

Li-ion is just too expensive and maintenance-intensive to use grid scale.

Well, the point of this announcement is that Li-ion is getting cheaper. Li-ion grid storage still won't make sense in the middle of America, where power is cheap, and grids are wide. But it make make sense in places like Hawaii ($0.40 / kw-hr), where grid stability is already a problem.

Comment: Re:Combined with solar (Score 1) 123

by ShanghaiBill (#49550815) Attached to: Tesla To Announce Battery-Based Energy Storage For Homes

Would make sense to have pv panels charge them up during the day and release energy at night.

This may make sense in a few rare locations, like Hawaii, and isolated villages in Africa. But generally, it is dumb to turn expensive day-time peak electricity into cheap night-time base electricity.

Comment: Prime example (Score 1) 32

by HangingChad (#49550691) Attached to: Microsoft Increases Android Patent Licensing Reach

If anything points out that software patents should be completely thrown out it's this kind of nonsense. The computer world used to joke about the "Microsoft tax" on new computers due to the cost of Windows. This is, literally, a Microsoft tax on Android devices. At least with Windows you got something, this is money for nothing. This is not what the patent system was designed to do.

Comment: Re:Nice idea but... (Score 1) 123

by drinkypoo (#49550577) Attached to: Tesla To Announce Battery-Based Energy Storage For Homes

I do understand the solar industry, that's why I fliped two big middle fingers to them and bought and imported all china solar panels and installed a 5Kwh setup for drastically cheaper than any of the overpriced US crap.

Like anyone else, I will buy the panels which provide the most output for my dollar, and which fit in the space available. But if the world would institute some laws which would penalize countries for slave labor and environmental abuse, then it would cease to make sense to buy a lot of that crap. I sit here surrounded by similar crap, but the point remains.

I use grid intertie and drive the meter backwards. No local storage.

That's certainly cost-effective, but it won't help as much in an outage.

Electrical bill is $14.95 a month because you have to pay the "fees" and the scumbag leaders in my states government passed a law that allows the power company to not pay for any surplus I generate above my own use.

Yes, scumbags are always the problem. Obviously it wouldn't make sense for you to add a lot of battery on the basis of selling power back at shifted times.

Comment: Re:Nice idea but... (Score 1) 121

by Lumpy (#49550547) Attached to: Tesla To Announce Battery-Based Energy Storage For Homes

I do understand the solar industry, that's why I fliped two big middle fingers to them and bought and imported all china solar panels and installed a 5Kwh setup for drastically cheaper than any of the overpriced US crap.

Spent 1/2 the price got the same panels all monocrystalline and of very good quality build. It's been in operation for 3 years now with no problems. I use grid intertie and drive the meter backwards. No local storage.

Electrical bill is $14.95 a month because you have to pay the "fees" and the scumbag leaders in my states government passed a law that allows the power company to not pay for any surplus I generate above my own use.

Comment: Re: There ought to be a law (Score 1) 109

Just because you put words together, it doesn't mean the resulting sentence is true.

And you just made a meaningless statement which advances the conversation in no way whatsoever, since it could equally be applied to anything anyone said ever. If you want to provide some sort of meaningful information, you can do that. Or can you?

"It's when they say 2 + 2 = 5 that I begin to argue." -- Eric Pepke

Working...