rent a roof solar panels

zee_2

with the rent a roof scheme with say a 3.5 kw panels , is there a division of power generated between household and panel owner to grid.
is there any way to see how much power being generated that could be used by household to reduce bills
any other info on power side ONLY appreciated.

macman

Any power unused onsite goes back to the grid.An export meter is not fitted on domestic installs, as it is assumed that you are exporting 50%, you (or in this case the panel owner) are paid the FITS accordingly.
Most installs come with a portable generation meter.

zee_2

thanks for answer, does that mean for example 10kw produced in a day ,at least 5kw goes to grid.

macman

No, it means that whatever kWh's your system produces in a day, 50% is assumed to go the grid, for FITS purposes. You are paid on the export tariff at 50% of your generation meter readings. To know the exact amount exported requires a export meter, at extra cost.

Cardew

macman wrote: »

No, it means that whatever kWh's your system produces in a day, 50% is assumed to go the grid, for FITS purposes. 'You are paid on the export tariff at 50% of your generation meter readings. To know the exact amount exported requires a export meter, at extra cost.

Just a point of clarification, on a Rent a Roof scheme 'you' don't get any money.

You can use as much of the electricity as the panels generate; in theory if it generated say 3,000kWh a year you could use all of that electricity in your house.

In practice, given the pattern of generation, it is impossible to achieve that goal.

There will be a meter stating how much the panels are generating at any one time, but that output can vary wildly from one moment to the next.

In practice you will probably save in the region of £100 a year if you work at measures to use as much as possible.

nesssie1702

If you've got a mortgage on your house, then there are implications for that if you "rent the roof" on the property.....

macman

I should perhaps have said 'FITS are paid on the export tariff at 50%...'
Obviously if you have signed away your FITS then you will only benefit from the generation you consume onsite rather than purchase from the grid.

zee_2

thanks for some answers ,some points
1. it is housing assn house and they are advising it.
2. i,m 68 so what happens in 25 years will be of no interest
3. in scotland there is 10 moratorium on house purchase ,by then may be dead.
I was just wondering how renta roof comp.could make money if tennant had access to all power generated to use ,does not make sense , there must be an allowance for r a roof to make profit surely.

macman

Because even if the tenant were to use 100% of all the power generated, the rent a roof co still get the FITs, which are based on 50% of metered generation, regardless of the amount actually exported.
You get the panels free, and any power you can use without drawing it from the grid, in return for signing over the FITs.

Cardew

zee wrote: »

thanks for some answers ,some points
1. it is housing assn house and they are advising it.
2. i,m 68 so what happens in 25 years will be of no interest
3. in scotland there is 10 moratorium on house purchase ,by then may be dead.
I was just wondering how renta roof comp.could make money if tennant had access to all power generated to use ,does not make sense , there must be an allowance for r a roof to make profit surely.

Whoever installs the panels on your roof gets a large subsidy for any electricity that the panels produce(it is called a Feed In Tariff -FIT), they also get a payment for 50% of the electricity generated, even if you used it all.

In your case, you have nothing to lose by having the panels fitted and it will save some money on your bills.

Do you have gas, or Economy 7?

C_Mababejive

A good way for roof renters to maximise there capture is to have a low wattage immersion heater fitted to your hot water cylinder. If you havent got one,well im not sure there is much point in roof renting.