Tesla Powerwall in South Africa - prices and what it offers

[AlphaJohn]

Are Powerwalls Li-ion, or LiFePO4?

LiFePO4 = Litium ion

Powewall = (NMC) Nickel Manganese Cobalt
PylonTech = (LiFePO4) Iron Phosphate

The one catches fire the other doesn't

Both boast 6000+ Cycles & 10 year + Lifespan.

 

[AlphaJohn]

If everybody gets a powerwall or alternative solution, would the grid not collapse?

If you turn off one area to shed 1000MW then switch to another area 2 hours later, the first area will increase their electricity usage by 1000MW to recharge their powerwalls resulting in a net shedding of 0MW.

If they all stayed Eskom fed, yes, but seeing that Inverter + batteries are the most expensive part, its a gateway for most to go solar and remove their loads completely. <-- Reason why Eskom wanna start charging people saying goodbye cause they lose income.

 

[Mike Hoxbig]

Are Powerwalls Li-ion, or LiFePO4?

@Speedster you can have this one...

 

[Speedster]

Are Powerwalls Li-ion, or LiFePO4?

LiFePO4 = Litium ion

Powewall = (NMC) Nickel Manganese Cobalt
PylonTech = (LiFePO4) Iron Phosphate

The one catches fire the other doesn't

Both boast 6000+ Cycles & 10 year + Lifespan.

LiFeP04 is a lithium-ion in that it is the lithium ions that move from the negative electrode through an electrolyte to the positive electrode during discharge and back when charging. Lithium nickel manganese cobalt oxide (aka NMC) is also a lithium-ion, as are a number of other popular battery technologies.

 

[RonSwanson]

LiFePO4 = Litium ion

Powewall = (NMC) Nickel Manganese Cobalt
PylonTech = (LiFePO4) Iron Phosphate

The one catches fire the other doesn't

Both boast 6000+ Cycles & 10 year + Lifespan.

Both can catch fire. NMC has a slightly lower threshold for thermal runaway than LiFePO4 (210 vs 270 degrees C), but then again who runs their batteries at 200 degrees plus?

NMC are characterised by far higher charge and discharge rates than LiFePO4, and their compact nature (more energy dense).

 

[AlphaJohn]

Both can catch fire. NMC has a slightly lower threshold for thermal runaway than LiFePO4 (210 vs 270 degrees C), but then again who runs their batteries at 200 degrees plus?

NMC are characterised by far higher charge and discharge rates than LiFePO4, and their compact nature (more energy dense).

Safety of Lithium-Ion batteries - PowerTech Systems

Safety of Lithium-Ion batteries - PowerTech Systems

www.powertechsystems.eu

 

[RonSwanson]

Safety of Lithium-Ion batteries - PowerTech Systems

Safety of Lithium-Ion batteries - PowerTech Systems

www.powertechsystems.eu

That LFP still got very hot, regardless of whether it caught fire or not. It's also pretty much common cause to keep batteries away from drill presses, and other impact tools...

 

[SpaceY]

Powerwalls are liquid cooled units, hence why they offer 80% guaranteed life, unlimited discharge cycles, 100% to 0% depth of discharge unlimited times a day. Most other batteries have DOD 80 or 90 % with a single cycle a day and then the warranty fine print.

Also the tesla app is years ahead of any product in the market. Last year the latest update pushed units to 50% more output than normal.

 

[McGuywer]

Powerwalls are liquid cooled units, hence why they offer 80% guaranteed life, unlimited discharge cycles, 100% to 0% depth of discharge unlimited times a day. Most other batteries have DOD 80 or 90 % with a single cycle a day and then the warranty fine print.

Also the tesla app is years ahead of any product in the market. Last year the latest update pushed units to 50% more output than normal.

Are you saying that you never need to buy another battery? (If you are fine with only 80% output).

 

[Slootvreter]

Written like an ad

 

[SauRoNZA]

Are you saying that you never need to buy another battery? (If you are fine with only 80% output).

He’s saying unlike other battery warranties Tesla don’t put a cycle limit in place.

 

[RedViking]

LiFeP04 is a lithium-ion in that it is the lithium ions that move from the negative electrode through an electrolyte to the positive electrode during discharge and back when charging. Lithium nickel manganese cobalt oxide (aka NMC) is also a lithium-ion, as are a number of other popular battery technologies.

And this people, right here, is why I failed science. I just know there is power. And there is no power. But they make these definitions the things that give you 30% or more.

/respect

 

[RedViking]

He’s saying unlike other battery warranties Tesla don’t put a cycle limit in place.

Imagine how much it will cost you under warranty to send it back to the supplier. Just to get it removed and transported and the new one installed back in again will cost an arm and a leg, unless they cover all that, it makes the warranty a lot less attractive.

 

[itareanlnotani]

Has anyone fitted a system for a household that uses between 40-50kw a day?

I'd suggest something like the 16KW Sunsynk at 60k odd.
Then 20KW of panels if you can fit on the roof 100-120k ish
And Suitable amounts of battery. Ideally at least 40-50kWh - 250k++

Probably looking at 500k for a system like that though, which is possibly a bit much. I'd even say thats not enough battery, you'd want 100kWh to be safer. which would put you at 750k++

There is a much cheaper way though - drop your daily load from 40-50kWhrs a day to something less.
If its geysers, go with Heatpump or Solar Hot Water. If cooking, move to gas. If Halogens toss them replace with LED etc.

Reducing your daily usage is the cheapest method. Fix that first before you throw money at problems.

I'm in the opposite situation. I reduced load to single figures daytime, now I'm looking for ways to increase usage so I don't waste excess power.

 

[itareanlnotani]

LiFePO4 = Litium ion

Powewall = (NMC) Nickel Manganese Cobalt
PylonTech = (LiFePO4) Iron Phosphate

The one catches fire the other doesn't

Both boast 6000+ Cycles & 10 year + Lifespan.

Moving to LFP though, pricing is better.

Tesla Hints At Transition Of All Energy Storage To LFP Batteries

Tesla CEO Elon Musk said that the company expects to transition all stationary energy storage (ESS) products to the LFP battery chemistry.

insideevs.com

 

[maumau]

I dream of owning a Tesla Powerwall

 

[maumau]

Backup power is nice. But I've currently got a hybrid inverter sitting with a error code 09 which renders it all a very expensive paperweight at the moment, and I ain't an electrician :/

So yeah, it can be a pain also. Hopefully insurance will cover it, once I can get someone to help fix who will actually reply.

Just be prepared to deal with stuff like that

Wonder how difficult it would be to get maintenance/service on a Powerwall in SA.

Why isn't it working?

 

[itareanlnotani]

Why isn't it working?

Smells like an Axpert error

Axpert error code 09

Hallo everyone could anyone have a direct cause of the error code 09 on an Axpert inverter.

powerforum.co.za

Blown mosfets on the board is likely. So hardware issues..

 

[SauRoNZA]

Imagine how much it will cost you under warranty to send it back to the supplier. Just to get it removed and transported and the new one installed back in again will cost an arm and a leg, unless they cover all that, it makes the warranty a lot less attractive.

Like any other warranty that is all their problem, not yours.

This applies to any brand.

The real bonus here is all these things have logging and data and in most cases the claim would be approved beforehand and simply swopped out with a new one.

 

[RedViking]

Like any other warranty that is all their problem, not yours.

This applies to any brand.

The real bonus here is all these things have logging and data and in most cases the claim would be approved beforehand and simply swopped out with a new one.

So they will cover the installation and removal as well? Just making sure I get this right. You are very sure of this?