Iboost - yes or no

nigelpm

Dave_Fowler wrote: »

For my 6kWp system
So for me that's £78 per year minimum. I am very fortunate in that I was able to design, build and install my own controller for a cost of around £140 - so it has already paid for itself.

Dave F

Sorry, should have stated my calcs were based on a 4kw/h system limited to 3.6 Kw/h by DNO.

For a 6Kw system the economics become much more preferable.

nigelpm

Minrich wrote: »

What is there to go wrong with it ? Its just a glorified switch afterall.

Who says its a cheap bit of kit ?

Who knows?

Seems prudent to stick in 4 years maximum anyway though given smart Meters will make them obsolete anyway from 2019.

EricMears

nigelpm wrote: »

....smart Meters will make them obsolete anyway from 2019.

Are there any plans to introduce smart meters that are also able to measure export ?

nigelpm

EricMears wrote: »

Are there any plans to introduce smart meters that are also able to measure export ?

In a word yes.

http://www.solarpowerportal.co.uk/news/smart_meters_can_cut_fit_confusion_says_ofgem_3356

“The rollout of smart meters will provide consumers with greater information regarding their consumption of electricity. The technical specification for these meters includes the ability to measure exported electricity,” an Ofgem spokesperson told Solar Power Portal. “As older meters are replaced we expect fewer consumers to be affected by this issue.”

The smart meter rollout begins in earnest in 2015 with a targeted end date of 2020.

Martyn1981

EricMears wrote: »

Are there any plans to introduce smart meters that are also able to measure export ?

I believe that they'll measure export, but I don't think there is any requirement to use the information for payment of the export element, yet.

Reading the referenced article (rather than the extract), it is actually about those old (and rare) meters that can add export to import.

Mart.

Martyn1981

nigelpm wrote: »

Who knows?

Seems prudent to stick in 4 years maximum anyway though given smart Meters will make them obsolete anyway from 2019.

seems significantly different to the earlier advice:

nigelpm wrote: »

These things are built to last 3-5 years.

Typed on my 7 year old (2yr guaranteed) computer, whilst listening to the radio on my 1yr guarantee JVC 2 cassette deck, CD, radio player ..... which is 27 yr old!

Mart.

nigelpm

Martyn1981 wrote: »

seems significantly different to the earlier advice:



Typed on my 7 year old (2yr guaranteed) computer, whilst listening to the radio on my 1yr guarantee JVC 2 cassette deck, CD, radio player ..... which is 27 yr old!

Mart.

haha. All true. Just throwing it out there.

nigelpm

Martyn1981 wrote: »

I believe that they'll measure export, but I don't think there is any requirement to use the information for payment of the export element, yet.

Mart.

This is a good point and one which further googling hasn't been able to prove or disprove.

Still in any financial calculation it helps to be prudent but I concede a 5 year life is probably about right.

tr8

I had Immersun added when I had my hot water tank replaced as part of a upgrade from a old unlaged copper tank system ,to a new Gledhill 400l twin coil, twin heater stainless steel twin skin tank, running main pressure system.
Since October 4th to today it has transferred 634kwh to my hot water tank, and some days already the tank is full at 68'C when I get home
When I heat from gas it is the top coil so only does about 200l and heats to 50'C,
The Immersun heats the top 1st element then, the bottom 1/2.
It is linked to my 4kw solar panel and as we work and kids at school we sent loads to the grid before this was fitted.
I will easily supply over 1500kwH in a year, may be over 2000kwH my gas works out at 3.9p per kwH. + the cost of running the boiler what ever that is.
I will get my money back in 4 years,( paid £211.63 inc vat) I have the free 5 year warranty Immersun were giving away.
It takes about 17kwh to heat the tank from cold to full heated, in many summer days I produce over 30KwH. best was 39.7kwH in my SunnyBoy log.


Do your own maths but it works for us.

nigelpm

tr8 wrote: »

I had Immersun added when I had my hot water tank replaced as part of a upgrade from a old unlaged copper tank system ,to a new Gledhill 400l twin coil, twin heater stainless steel twin skin tank, running main pressure system.
Since October 4th to today it has transferred 634kwh to my hot water tank, and some days already the tank is full at 68'C when I get home
When I heat from gas it is the top coil so only does about 200l and heats to 50'C,
The Immersun heats the top 1st element then, the bottom 1/2.
It is linked to my 4kw solar panel and as we work and kids at school we sent loads to the grid before this was fitted.
I will easily supply over 1500kwH in a year, may be over 2000kwH my gas works out at 3.9p per kwH. + the cost of running the boiler what ever that is.
I will get my money back in 4 years,( paid £211.63 inc vat) I have the free 5 year warranty Immersun were giving away.
It takes about 17kwh to heat the tank from cold to full heated, in many summer days I produce over 30KwH. best was 39.7kwH in my SunnyBoy log.


Do your own maths but it works for us.

Nice one. Clearly works for you which is great.

My point was that people need to work it out before assuming it will work for them.