More doom and gloom

[openspaceman]

1 hour ago, sime42 said:

 

You've got it all mixed up boyo. The increase in forest fires that we're seeing is nothing to do with Climate Change, it's just because of all those pesky arsonists. (Well, that's what I read on here anyway, in relation to the fires in Greece last year).

Well yes it is as it is the slight change in conditions that allows the fires to take off, for whatever way they are started. The world as we knew it was a miracle of circumstances that made it just right.

[peds]

1 hour ago, sime42 said:

 

You've got it all mixed up boyo. The increase in forest fires that we're seeing is nothing to do with Climate Change, it's just because of all those pesky arsonists. (Well, that's what I read on here anyway, in relation to the fires in Greece last year).

 

Oh right, I remember. Probably either Antifa or Greenpeace arsonists, generally. 

[Muddy42]

2 hours ago, Steven P said:

Depends what you are asking for, the cheapest (least efficient) are half the price of the most efficient, ranging from about £800 / kwh to £1500 / kwh.

Because you say kwh, I presume you are just referring to the cost of batteries? I was trying to look at the total cost - PV panels, inverter and batteries.  Granted every installation is different - mine are on a shed rather than my house which makes the installation simpler, but requires a longer cable.  My only stipulation was I didn't want a tesla battery because I think Elon is a pr1ck. 

 

1 hour ago, openspaceman said:

Bear in mind it was a price for parts to DIY and roof mounting adds to the cost, I bought scaffold poles and mounted on them for my recent 1800W

 

15 410 Canadian Solar  @£78

3 Pylontech 3000c @£975

1 5kWsunsink ecco offgrid/grid inverter @£1,049

=£5144

 

 

Ah so the fact its DIY will explains the reduced cost, nice 1.

[openspaceman]

3 minutes ago, Muddy42 said:

Ah so the fact its DIY will explains the reduced cost, nice 1.

Yes, my Daughter's mcs installed similar system with a Zappi ev charger came in at £12k 11 months ago. Professional installation has the advantage of reclaiming VAT and allows you to get an export tariff.

[sime42]

8 minutes ago, peds said:

 

Oh right, I remember. Probably either Antifa or Greenpeace arsonists, generally. 

 

Ah, knew I'd seen the pearl of wisdom somewhere.

 

 

[peds]

14 minutes ago, sime42 said:

 

Ah, knew I'd seen the pearl of wisdom somewhere.

 

Colour me shocked!

[Muddy42]

15 minutes ago, openspaceman said:

Yes, my Daughter's mcs installed similar system with a Zappi ev charger came in at £12k 11 months ago. Professional installation has the advantage of reclaiming VAT and allows you to get an export tariff.

 

I had the PV installed last year and am currently looking at battery systems from Giv energy or My energy.  Yes I am procrastinating about the cost (dropping VAT has helped) but its also quite hard to size the system properly because Octopus havn't installed a smart meter yet (grrr!).

[Steven P]

1 hour ago, Muddy42 said:

Because you say kwh, I presume you are just referring to the cost of batteries?

 

Whoops - that was meant to be kW

[openspaceman]

2 hours ago, Muddy42 said:

 

I had the PV installed last year and am currently looking at battery systems from Giv energy or My energy.  Yes I am procrastinating about the cost (dropping VAT has helped) but its also quite hard to size the system properly because Octopus havn't installed a smart meter yet (grrr!).

Professionally installed with battery sufficient for storing a winter day's worth of electricity worked out at £2k/kW for her, she is in a particularly good position for Solar PV and produces about 50% more than my similarly sized (4kW original and 1800W DIY addition) in the year. If I were buying again I would have a bigger battery to cover my worst day's demand. I don't see much point going bigger than that because off peak charging covers you for dull days. What is interesting to me is that her Solis hybrid inverter does not allow her to charge to a set % state of charge. The reason this is desirable is that you need to enter the day with enough room in the battery to absorb any solar PV but still have enough to cover the evening demand until the next offpeak slot if it is a dull day.

 

The economics if you have an EV are something like:-

 

Peak rate 31p/kWh

Offpeak rate 9p/kWh

Battery amortisation say 7p/kWh

Charge-discharge loses 20%

 

So using the battery to avoid peak rate costs 9p/.8+7p=18.75p so a saving of 12.25p/kWh by using battery to avoid peak rates.

 

...and what has this to do with wood burning stoves being banned?

 

 

[Muddy42]

40 minutes ago, openspaceman said:

Professionally installed with battery sufficient for storing a winter day's worth of electricity worked out at £2k/kW for her, she is in a particularly good position for Solar PV and produces about 50% more than my similarly sized (4kW original and 1800W DIY addition) in the year. If I were buying again I would have a bigger battery to cover my worst day's demand. I don't see much point going bigger than that because off peak charging covers you for dull days. What is interesting to me is that her Solis hybrid inverter does not allow her to charge to a set % state of charge. The reason this is desirable is that you need to enter the day with enough room in the battery to absorb any solar PV but still have enough to cover the evening demand until the next offpeak slot if it is a dull day.

 

The economics if you have an EV are something like:-

 

Peak rate 31p/kWh

Offpeak rate 9p/kWh

Battery amortisation say 7p/kWh

Charge-discharge loses 20%

 

So using the battery to avoid peak rate costs 9p/.8+7p=18.75p so a saving of 12.25p/kWh by using battery to avoid peak rates.

 

...and what has this to do with wood burning stoves being banned?

 

 

 

Nothing really, unless someone strays into CHP!

 

Yes I don't have an EV and am not really interested in export, nor trading power (charging batteries at off-peak to export at peak) etc.  Selfishly I see this at solving someone else's problem and the export prices aren't good enough yet. I'm aiming to have battery simply to keep power back from the average day to cover the average night's usage (or if that's not possible simply reduce winter peak power usage).