Hi all, a newbie here!
I have been using solar since the first UK FIT scheme in 2011. I have 2 arrays and typically generate just over 8,000KWh per annum. My export tariff is based on 50% deemed export at 3.82p per KWh (ie about £150 per annum).
I had a Powerwall with the new Gateway installed last month and took the opportunity to update the gas system at the same time to include an immersion heater in a more efficient cylinder.
I am really pleased with everything so far and have not used any gas or electricity since the installation. I suspect that will be the case for several months to come. I am still exporting a lot as well and I like the look of the new Outgoing Octopus rate.
However, I am looking ahead to Winter, when there will be a different need. We have a conservatory with 2 Fischer storage heaters which draw up to 2.7KW total.
I am considering switching to the Octopus Go EV rate – 5p per hour from 00:30 to 04:30 each day.
In my ideal winter world (I think!) I would use this 4 hour window to run the storage heaters and get them hot for the next day and also to top up the battery ready for the next day. I recognise that this may mean that I over fill the battery some days, but Outgoing Octupus means they would buy surplus energy back at 5.5p. I am aware that I would forego my FiT export component which is at a lower rate anyway. I think I can make sense of this calculation through trial and error.
However, my question is not really about my logic in trying to achieve this. I have been trying to make sense of how I would use the Tesla App to make this happen.
I think that I would have to use Cost Saving mode and, in the late evening, set the Reserve to a percentage close to the State of Charge at that time. I would set the strorage heater timers to come on at 00:30 and off before 04:30 and anticipate that they would then draw from the grid as the battery is below the reserve figure, so that I am using the 5p rate to maximise their heat capacity. They can then trickle charge through the day, probably with a boost in the afternoon.
I am also assuming that, because I am “cost saving” mode, the battery would take the opportunity to get back above the reserve level by charging from the grid. Is this a reasonable assumption? I have not convinced myself yet!
I would not be surprised if my thinking is flawed, as I have found it difficult to understand the way the different modes are intended to work.
Any views, comments would be very welcome
Many thanks
I have been using solar since the first UK FIT scheme in 2011. I have 2 arrays and typically generate just over 8,000KWh per annum. My export tariff is based on 50% deemed export at 3.82p per KWh (ie about £150 per annum).
I had a Powerwall with the new Gateway installed last month and took the opportunity to update the gas system at the same time to include an immersion heater in a more efficient cylinder.
I am really pleased with everything so far and have not used any gas or electricity since the installation. I suspect that will be the case for several months to come. I am still exporting a lot as well and I like the look of the new Outgoing Octopus rate.
However, I am looking ahead to Winter, when there will be a different need. We have a conservatory with 2 Fischer storage heaters which draw up to 2.7KW total.
I am considering switching to the Octopus Go EV rate – 5p per hour from 00:30 to 04:30 each day.
In my ideal winter world (I think!) I would use this 4 hour window to run the storage heaters and get them hot for the next day and also to top up the battery ready for the next day. I recognise that this may mean that I over fill the battery some days, but Outgoing Octupus means they would buy surplus energy back at 5.5p. I am aware that I would forego my FiT export component which is at a lower rate anyway. I think I can make sense of this calculation through trial and error.
However, my question is not really about my logic in trying to achieve this. I have been trying to make sense of how I would use the Tesla App to make this happen.
I think that I would have to use Cost Saving mode and, in the late evening, set the Reserve to a percentage close to the State of Charge at that time. I would set the strorage heater timers to come on at 00:30 and off before 04:30 and anticipate that they would then draw from the grid as the battery is below the reserve figure, so that I am using the 5p rate to maximise their heat capacity. They can then trickle charge through the day, probably with a boost in the afternoon.
I am also assuming that, because I am “cost saving” mode, the battery would take the opportunity to get back above the reserve level by charging from the grid. Is this a reasonable assumption? I have not convinced myself yet!
I would not be surprised if my thinking is flawed, as I have found it difficult to understand the way the different modes are intended to work.
Any views, comments would be very welcome
Many thanks