Electricity (1 Viewer)

[magicbastarder]

this is from the boards FAQ on solar:

Should I get an EDDI?

So first off an EDDI is a device which takes the “excess energy” that you are exporting to the grid (usually for free until the feed-in-tariff comes in) and uses that to heat the water in your immersion tank.

The general thinking is that EDDI’s while they are a useful and convenient device, for €500 or so, it’s unlikely that you will get that money back in the lifetime of the device. If you think about it, €500 will probably pay to heat your immersion tank once a day everyday for 3 years.

That said, while the return on investment may be questionable, many people do get in the EDDI’s as from April-October, it’s nice to have the convenience of hot water available for this “once off” fee. As many people have oil/gas boiler that they need to fire up to heat water in the summer months then the convenience of the Eddi is also worth considering.

 

[magicbastarder]

though i'm not so sure at all about the claim that you'd spend €500 in 3 years heating the tank in full every day (though i assume they mean in the above situation that you do have solae power). if you're heating it from the mains, you're probably looking at 5 units of electricity to heat water from 10C to 60C - so that's over euro a day if it's a 100L tank.

 

[magicbastarder]

the ideal homes exhibition is on this weekend, and much as i hate things like that, i'll head over and get some more quotes.

 

[magicbastarder]

another dumb question - is the feed-in (currently) a flat 19.5c per unit, regardless of what price plan you're on?
i.e. could you charge the battery at 2am for an hour at 8c per unit, and immediately sell it back at 3am for 19.5c per unit?

 

[dudley]

I think noise beside the airport is ok.

These are massive companies in Germany filling fields with panels that were previously let out for farming whose crop is cash from the government buying their electricity. You can see how cut troat it can be, like as if they give a shit about some 70 year old in a farm house and whether he can sleep at night with the noise. Oh and they are installing 100s of acres alarmingly quickly.

Local residents claim €772m health bill from Dublin Airport noise impacts

The report says close to 17,000 people have been affected by cardiovascular issues as a result of noise impact from the airport.

www.thejournal.ie

 

[Anthony]

another dumb question - is the feed-in (currently) a flat 19.5c per unit, regardless of what price plan you're on?
i.e. could you charge the battery at 2am for an hour at 8c per unit, and immediately sell it back at 3am for 19.5c per unit?

Can you sell from a battery? Battery havers?

 

[pete]

another dumb question - is the feed-in (currently) a flat 19.5c per unit, regardless of what price plan you're on?
i.e. could you charge the battery at 2am for an hour at 8c per unit, and immediately sell it back at 3am for 19.5c per unit?

I do not know, but would assume the suppliers are not going to allow that.

 

[pete]

Can you sell from a battery? Battery havers?

Yes, but i think it’s usually done as a misconfiguration.

 

[ann post]

As I said you (and I do specifically mean YOU here, but anyone can) could easily set up home assistant to do everything an Eddi does for considerably less money.



And don’t forget about gridshifting - In theory I can buy 5kwh between 2am-5am at 7.45c per kwh then use it after 8am when we would otherwise be paying 29.22c per kwh or if I was really clever I’d hold back enough to get through the 5pm-7pm 40.75c peak rate.

I realise that’s only saving like a Euro a day, but it’s over €350 a year and that adds up over time AND IT’S THE PRINCIPLE DAMMIT.

Also if loads of people (about 8% of the country) did that we'd be able to stop using coal in the mix.

 

[magicbastarder]

Thursday saw the highest ever solar generation in Ireland, possibly beaten again yesterday.

 

[ernesto]

Thursday saw the highest ever solar generation in Ireland, possibly beaten again yesterday.

Yeah been a great week.

Have been generating approx 37kwh almost daily and exporting at least 50%

 

[pete]

Yeah been a great week.

Have been generating approx 37kwh almost daily and exporting at least 50%

We're on 20kwh/day for the last few days. 6 south facing panels, 3 north facing.

NEED MOAR PANELS

 

[ernesto]

We're on 20kwh/day for the last few days. 6 south facing panels, 3 north facing.

NEED MOAR PANELS

That's pretty good!

You have less than half the panels we do; we've 10 west and 10 east and we are on on a hill so not ideal. Ours must be inefficient but it's the most amount of panels we could fit on the house.

 

[pete]

north facing is as bad as it gets

 

[ann post]

has anyone got a per panel average per year

or even a year total kwh and the number of panels and i can do the math myself?

 

[ernesto]

has anyone got a per panel average per year

or even a year total kwh and the number of panels and i can do the math myself?

Yes. This is for 2024




20 panels and a 5kwh battery

 

[pete]

has anyone got a per panel average per year

or even a year total kwh and the number of panels and i can do the math myself?

I'll try to get a report that splits out the north facing vs south facing panels because due to sun elevation it makes a big difference in deepest winter, but a relatively small difference in peak summertime.

Time	Monthly Yield(kWh)
01/2024	108.000
02/2024	158.000
03/2024	244.000
04/2024	379.000
05/2024	462.000
06/2024	504.000
07/2024	480.000
08/2024	440.000
09/2024	283.000
10/2024	213.000
11/2024	93.000
12/2024	66.000

 

[ann post]

I'll try to get a report that splits out the north facing vs south facing panels because due to sun elevation it makes a big difference in deepest winter, but a relatively small difference in peak summertime.

Time	Monthly Yield(kWh)
01/2024	108.000
02/2024	158.000
03/2024	244.000
04/2024	379.000
05/2024	462.000
06/2024	504.000
07/2024	480.000
08/2024	440.000
09/2024	283.000
10/2024	213.000
11/2024	93.000
12/2024	66.000

How many total panels is this?

 

[pete]

How many total panels is this?

9.

6 South facing
3 North facing

 

[pete]

It doesn't seem to be possible to export a monthly or annual report that includes the split between the two sets of panels. I can do it on a daily basis but that's it.

I'll see if I can automate it somehow because I'd actually like to have that data myself.