- Joined
- 16 Sep 2021
- Messages
- 2,884
- Reaction score
- 30
- Country
Is that taking into account increasing prices of fuel?
Solar Power -
- Thread starter Munroast
- Start date
Have you made a G99 application for an 8KW system or are you limiting the output to the grid to 3.68KW's ?
The quotes I had were just squeezing in under £10k without batteries. But I don't think they were trying too hard and that was only from two suppliers, I'd need to shop much more before I bought. I think I could get something closer to £9k.
I doubt I'd even look at PowerWall, they're just too expensive and too large for me. I'd be looking for a pylontech or similar modular one.
Last edited:
The quotes I had were on the basis they'd apply for G99 but that the kit could software limit to 3.68, or whateve I was capped at, if needed.
Export value of power under SEG is pitiful, so missing out on some of it isn't that big a deal.
Op asked how much panels produced so hopefully gave figures based on real experience.
In your 60 year example , did you take into account the nearly £700 a year saved in not having to buy from the grid? ...and prices are set to rise yet again
My site is relatively poor compared to others, in that we lose the sun earlier than others due to hills, but this is what my 4kW array has done...
I get 16p per 'click'; and 4.5p for the 50% of all energy deemed to be exported to the grid.
I get 16p per 'click'; and 4.5p for the 50% of all energy deemed to be exported to the grid.
Sort of. You are definitely allowed to connect 3.68kW (often rounded up to 4kW) to the grid and to feed that much power to the grid without any special permission. Think of it as the equivalent of permitted development.
If you want to install more you either need to make sure you won't push more than 3.68kW by limiting your export, or get permission from the grid operator (DNO). Exporting power is a terrible way to make money now, so losing a bit of the export doesn't matter that much. The advantage of a larger sized system is that you have more power to use when you want it.
Most of the power is generated between 10am and 4pm on sunny summer days.
How much do you spend on electricity at those times? With no heating or lighting demand?
What do you expect to save if you reduce usage at times of minimal usage?
- Joined
- 31 May 2016
- Messages
- 25,100
- Reaction score
- 5,499
- Country
That’s why you need reversible aircon. But even then that’s only 1kw used.
Without a battery or EV you're doing well to use 1/3 of the power you generate. If you schedule washing machines, tumble driers, air conditioners or electric heating you can get a surprising amount done. But most of your power will go to the grid.
During the summer the productive hours are much greater than 10-4 as well. The panels don't need to be going full tilt, just producing something is good
- Joined
- 31 May 2016
- Messages
- 25,100
- Reaction score
- 5,499
- Country
Late spring was often best for my old system as the cooler air allowed the panels to produce more. In the summer a S or SW facing setup will be hitting 500w-1K+ from about 6AM depending on the size, wont drop until 8PM
but not a significant value.
If you're only using 300W then solar panels producing 400W is significant.
