Economics of charging at 7p and exporting at 15p

Moxi
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Re: Economics of charging at 7p and exporting at 15p

#41

Post by Moxi »

Ha! can you remember when we used to discuss payback in terms of years!

how the times change

I hope everyone has a brilliant bank holiday weekend and that the sun shines resolutely upon one and all's panels !

Moxi
Yuff
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Re: Economics of charging at 7p and exporting at 15p

#42

Post by Yuff »

nowty wrote: Fri May 02, 2025 4:14 pm £182.03 profit for last month, enough to buy 3 x 450W PV panels including delivery from City Plumbing or 4kWh worth of LFP cells including delivery from Fogstar. :mrgreen:

Rinse and repeat. :twisted:

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Impressive Nowty but a little bit too much pink on that import chart :hysteria:
Monthly report - can do better


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14 kW Mitsubishi Ecodan ASHP
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EVs x 4 240 kWh Batteries
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nowty
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Re: Economics of charging at 7p and exporting at 15p

#43

Post by nowty »

Yes a bit too embarrassing for me, 3 feckups in one month and quite large ones too. :oops:

It does not take much peak rate to wipe out several days worth of profit. :evil:
19.6kW PV > 117MWh generated
Ripple 6.6kW Wind + 4.5kW PV > 34MWh generated
7 Other RE Coop's
105kWh EV storage
90kWh Home battery storage
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Rain water use > 530 m3
Yuff
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Re: Economics of charging at 7p and exporting at 15p

#44

Post by Yuff »

nowty wrote: Sat May 03, 2025 9:51 am Yes a bit too embarrassing for me, 3 feckups in one month and quite large ones too. :oops:

It does not take much peak rate to wipe out several days worth of profit. :evil:
It wouldn’t for us mere mortals that make pennies a day but those crisp £20 daily notes take a bit more to wipe them out. But you’re doing big numbers so feck ups do cost quite a bit.
When I forget to adjust something the annoyance at fecking it up is completely out of kilter with the cost :head-bang:
14 kW Mitsubishi Ecodan ASHP
11 x 460w Solar panels
Two 9.5kWh GivEnergy Batteries
EVs x 4 240 kWh Batteries
Ripple 5.8 kW PV 0.547 kW Whitelaw Brae
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Stinsy
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Re: Economics of charging at 7p and exporting at 15p

#45

Post by Stinsy »

My first ever month of positive figures also featured some F-ups and 3 days where the Octopus-connected EV wasn’t home so limited to the 6-hr cheap slot.
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
6x 2.4kWh Pylontech batteries (14.4kWh)
LuxPower inverter/charger

(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
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Joeboy
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Re: Economics of charging at 7p and exporting at 15p

#46

Post by Joeboy »

Stinsy wrote: Sat May 03, 2025 10:08 am My first ever month of positive figures also featured some F-ups and 3 days where the Octopus-connected EV wasn’t home so limited to the 6-hr cheap slot.
Congratulations, nice to be on the right side of the line.
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Fintray
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Re: Economics of charging at 7p and exporting at 15p

#47

Post by Fintray »

Not in Nowty's league for profit but not a bad month for the not so sunny North compared to the sun-blessed south and no fancy import cost graphs either (yet!).
Missing £11.51 of export from the 14th April for some reason.

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3.87kWp PV
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nowty
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Re: Economics of charging at 7p and exporting at 15p

#48

Post by nowty »

Fintray wrote: Sat May 03, 2025 8:28 pm Not in Nowty's league for profit but not a bad month for the not so sunny North compared to the sun-blessed south and no fancy import cost graphs either (yet!).
Missing £11.51 of export from the 14th April for some reason.

Image
Surely you have beat me at export and if your import is all at cheap rate your profitability is similar.
19.6kW PV > 117MWh generated
Ripple 6.6kW Wind + 4.5kW PV > 34MWh generated
7 Other RE Coop's
105kWh EV storage
90kWh Home battery storage
40kWh Thermal storage
GSHP + A2A HP's
Rain water use > 530 m3
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Fintray
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Re: Economics of charging at 7p and exporting at 15p

#49

Post by Fintray »

nowty wrote: Sat May 03, 2025 9:45 pm Surely you have beat me at export and if your import is all at cheap rate your profitability is similar.
£158.89 estimated but not confirmed.
3.87kWp PV
10.24kWp PV SolarEdge system
Tesla Powerwall 2
MK2 PV router DHW diverter
Morso 5kW WBS
Vaillant AroTherm 10kW ASHP
Nissan Leaf
Yuff
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Re: Economics of charging at 7p and exporting at 15p

#50

Post by Yuff »

I’m looking to upgrade our batteries to take advantage of the import export rates currently available to us IOG users.
I am having our heat pumps/ heating system, hopefully made more efficient, and electrician is looking at adding to our current storage which is attached to our panels on a hybrid GivEnergy system.
He has suggested maybe having a separate system if it can get DNO approval and I’m wondering if this might be better as it could potentially allow me to export whilst also keeping the house warm during the winter. He is thinking about a Fox ess ac coupled inverter and batteries which can be added on to as he thinks this might work out better value for adding storage.
Currently when I export I turn all the heating off.
The plumber has removed the buffer tank and has replaced the 2 heat pumps with a single larger heat pump and he is opening the UFH to one thermostat rather than 6 individual ones.
With our current system I could never have all zones and radiators on, at the same time, as the radiator flow temps were never high enough so some rads never came on and I had turned the temperatures down on the rads as well.
Hopefully this will all work better in the winter :xx:
14 kW Mitsubishi Ecodan ASHP
11 x 460w Solar panels
Two 9.5kWh GivEnergy Batteries
EVs x 4 240 kWh Batteries
Ripple 5.8 kW PV 0.547 kW Whitelaw Brae
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