ASHP with large thermal store (for load shifting)

[Beelbeebub]

17 hours ago, SteamyTea said:

Am I reading that right.

314 Ah at 3.2V, so 1 kWh.

6000 discharges, so £0.19/kWh before the cost of the juice you put in.

 

 

I think the spec is for one "cornex" module 

 

The price is includes 16 of them so 16kwh. 

 

Crazy low price. Less than 3p a kwh over 6k cycles 

Edited December 1 by Beelbeebub

[Beelbeebub]

At these low battery storage prices I wonder how long before someone like octopus will install a battery system at your house for free, you pay an elevated standing charge but get upto 15kwh a day "included" then a higher unit price afterwards. 

 

The battery charges up under control of energy firm at various times when the wholesale price is really low. 

 

Say the kit (battery plus 10kw inverter) costs energy Co £5k installed and is 15kwh usable. 

 

We assume the kit will last 10 years. So. Energy Co. Need £500 a year capital, let's say £730 or about £2 a day. 

 

The usual price for 15kwh at 25p plus 50p.standing charge is £4.25

 

If the energy. Co offered £3.75 a day, they would have 1.75 to buy 15kwh of energy, abiut 11.5p a unit average over the year. 

 

I reckon thry could do that. They can already seem to afford to give EV owners 8p a unit. 

[SteamyTea]

27 minutes ago, Beelbeebub said:

I think the spec is for one "cornex" module 

That would make sense.

11 minutes ago, Beelbeebub said:

At these low battery storage prices I wonder how long before someone like octopus will install a battery system at your house for free

I suggested this years ago as a cheap way to reinforce the local grid.

[Michael_S]

I guess reinforcing local grid is an issue for the DNO not the energy supplier so the economics becomes more complicated.

I also guess in theory the more short term storage is available the more prices will be arbitraged across the day and thus the less financial gain will be possible from possessing a battery - so the big differences between day and night rates will become a thing of the past and the return on battery systems will fall?