Experimental PV calculator

[Fintray]

The power from both my systems goes through the smart meter and all export (and import) is currently on the Flux tariff, there is no deduction of the readings from the FIT's generation meter.

Presumably 3p gets deducted from the 50% that would have been deemed export?

Nothing gets deducted as you sign up for a certain tariff and that is what you receive.

[openspaceman]

The power from both my systems goes through the smart meter and all export (and import) is currently on the Flux tariff, there is no deduction of the readings from the FIT's generation meter.

Presumably 3p gets deducted from the 50% that would have been deemed export?

Nothing gets deducted as you sign up for a certain tariff and that is what you receive.

I understand that for measuring the export, you get paid for what goes out.

It is the FIT part that I don't understand. My FIT is made up of the generation amount (~40p/kWh) and there is a deemed export of 50% of that for which I get paid ~3p/kWh ( I don't remember the precise figures but it's immaterial) so to get SEG you must get taken off the deemed export arrangement, effectively 1.5P /kWh should be taken off your FIT payments.

[marshman]

My fit statements (and I assume everyone else's) have 2 separate bits, one is Generation and the other is Export.

I simply contacted SSE (my FiTs provider) and asked for export payments to be stopped. A marker is put on the FiTs register to show you are no longer entitled to export payments under the FiTs scheme. You are then free to register for SEG payments from a supplier of your choice.

Your FiT payments and statements then only show details of your generation which comes from your Total Generation Meter. So no deduction as you don't get paid it. Everyone knows that you are (or are not) getting FiT export payments as they can look/check the FiT register.

Be aware that this is essentially a one way process. Once you have "given up" FiT export payments you cannot go back - at least that is what I was told and understood.

[Fintray]

Presumably 3p gets deducted from the 50% that would have been deemed export?

Nothing gets deducted as you sign up for a certain tariff and that is what you receive.

I understand that for measuring the export, you get paid for what goes out.

It is the FIT part that I don't understand. My FIT is made up of the generation amount (~40p/kWh) and there is a deemed export of 50% of that for which I get paid ~3p/kWh ( I don't remember the precise figures but it's immaterial) so to get SEG you must get taken off the deemed export arrangement, effectively 1.5P /kWh should be taken off your FIT payments.

My FIT's payments (installed 2010) are now 68.3p/kWh generated, if I was still on the deemed export with OVO I would also get and additional 3p/kWh (or so) on 50% of my generation figure, that is in addition to and not deducted from the FIT tariff.

Agree with all that Marshman has stated above.

[nowty]

............. if I was still on the deemed export with OVO I would also get and additional 3p/kWh (or so) on 50% of my generation figure, that is in addition to and not deducted from the FIT tariff.

Agree with all that Marshman has stated above.

The FIT export tariff is now 4.82p / kWh for installs before July 2012 and 6.79p / kWh for installs post that date.

[openspaceman]

Thanks Marshman, that was my understanding too . I shall contact my FIT company and ask to be taken off the deemed export register.

Just have to choose which Octopus tariff

[sharpener]

The power from both my systems goes through the smart meter and all export (and import) is currently on the Flux tariff, there is no deduction of the readings from the FIT's generation meter.

1. Thanks. So you now get SEG payments from Octopus for all exports, and FIT generation payments - but not export payments - from Ovo/SSE for the original FIT system, is that how it works?

2. How do they know you are no longer entitled to the export portion, deemed or otherwise?

3. What I was told about difficulty in metering the export from DC-connected generation appears to have been wrong then.

1. Yes, that is correct.
2. Octopus contacted SSE and told them I was moving my export to them.
3. Both my systems are AC connected, so I don't know about how DC generation would be counted.

Thanks. It seems from the subsequent discussion that the existing TGM will continue to record all the FIT generation and a smart meter will correctly record the total of all exports for SEG whether they originate on the AC or the DC side. So no problem. Except that SP say I can't have a smart meter as they will not work here.

As an aside, my new DC-connected panels had to have an AC meter assigned so its serial number could be put on the MCS certificate(!). But it wasn't wired up and remains to this day in the installers' stores as they said it could not be re-used.

[nowty]

As an aside, my new DC-connected panels had to have an AC meter assigned so its serial number could be put on the MCS certificate(!). But it wasn't wired up and remains to this day in the installers' stores as they said it could not be re-used.

Sounds similar to my OffGrid MSC system where it had my MPAN number assigned to it.

[richbee]

Richbee, depending on your tariff optimising for minimum import may not be the best strategy. For example with my flux simulations, I have a very high import and export as I'm effectively trading electricity between low rate and peak rate. This is hard on the battery though - around 400 cycles/year.

What tariff are you on at the moment? If you are on a single rate tariff you may be leaving a lot on the table.

I've just gone through the Octopus tariffs in more detail - I see what you mean about Flux - exporting at 21 or 33p/kWh could make a big difference instead of the current 5p - even if I'm not planning to do much swapping - ie deliberately charging at low rate and exporting at peak rate

[LesNewell]

I do have to wonder how sustainable that tariff is. Nothing else out there even comes close. It will be interesting too see if it is still around in a couple of years. In the mean time I intend to make full use of it as soon as my solar is installed. Apparently it should not be long now.