Worrying about replacing battery packs in 10 years is like worrying about replacing a few broken $100 solar panels.
We're looking at $70/kWh at worst by 2027, what's that......$15k for a replacement power pack? Hell, something less "space conscious" will certainly be on the market for half that in 10 years.
First, your assumption of $70/KWh in 2027 is based on 'Elon says", not any scientific projections. Tesla founders thought the same way back in 2004, but never happened. By now, you should know that Elon's statements are mostly aspirational.
Second, you assumed 1 Powerpack (200 KWh) to come up with your $15K. If it has to support 12 hours of night time, that's max 16 kw system. But the picture shows 5 powerpacks => 1 MWh => ~100kw system. That's what the whole discussion is based on. If you now say 1 PP is enough, implying a 16 kw system, you can get a 16 kw generator for $3800. Pocket change, eh? You can say, the PP does more than backup. But it depends on what the hospital needs.
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Ummm, why buy generators for places that have generators? You do know you can't just parallel two generators right? I mean if you had something like a Powerwall or powerpack and inverter sure. But not a standard genset.
Or are you imagining rewiring the main service panel for a hospital to split the load?
So say you did buy 25 generators with 500k. 500/25 is 20k per generator. A 50 kW diesel genset is 16k and uses 62 gallons a day at 1/2 load.
Generac Protector RD05034GDAE ® 50kW Automatic Standby Diesel Generator 120/208V 3-Phase
Let's be generous and say diesel costs the same as in the U.S. 2.75 a gallon. The generator will burn through 170 dollars a day. There was 4k left over from purchasing (ignoring tax and shipping) so they can use the generator for 4,000/170 or a little under 24 days.. so at 25 kWh load, it will be useful for less than 4 weeks. Of course, this one is not rated for life support applications, and you'll need to stop it every 5 days for maintenance, and change the oil every 10. OTOH that 20k would keep their current generator running for 4 months if need be. If money matters, burning it up seems less than optimum (excepting short term stop gap).
Well, my link was for donating generators to households that don't have generators
These are smal $1k gens they are donating.
I think you get the idea all right, but you just want to troll me
If some hospital needs 150kw, they get 150 kw. Here is a 150 kw under $30k. The extra generator acts as a backup to the backup. There are some generators that can be connected in parallel. But the backup of backup can help with easier maintenance, as hospital del nino said in their request. Instead, Ricardo and Tesla sent them something that gobbled up half of their parking lot
Tesla is doing full PPAs for 13.9 cents per kWh for 20 years as a sole power source, which includes hospitals (which should have UPS on critical loads anyway).
You brought up the Powerwall for some reason,not me.
We'll see what kind of deals Tesla signs in Puerto Rico. PPA makes sense. If the hospitals don't lose their parking lots, 13.9c/KWh is good price. But then, you go back to the power lines to bring power from far away solar farms, which get damaged by storms, which is the issue the whole microgrid thing is supposed to solve. Of course, underground lines or well maintained lines will solve a lot of it, but that won't be cool or be a big business for companies.
Solarcity/Tesla is most likely losing money big time in that Kaua'i project. As I showed, with current PP costs, just storing and recouping each KWh costs ~13.5c. Then there is 10% round trip loss. If they also bought the land and are maintaining that land & lines by themselves, that's additional costs Tesla is absorbing within the 13.9c/KWh price.
We might just keep trolling till we hear the next burst of news on "Tesla restores power to another dozen hospitals".
