solar panels

runner2021

Petriix said:

Is that Project Solar?
If so, avoid like the plague!

No, it is infinity renewables

runner2021

ispookie666 said:

If you remove the cost of battery, the system comes to £2.2per watt, which I think is on the higher side (especially if they are all going on the same roof orientation with string inverter).  Bigger the system, the lower the per watt cost (provider inverter does not need upsizing)  
I had quotes from £1.54 to 2.54 per watt, the latter for LG panels and for micro inverters.  

That's a very clear way to compare, thank you.

runner2021

QrizB said:

There's no way you'll use 100% of the electricity you generate. On a good summer's day you'll potentially generate 20kWh but your average daily consumption is only 9.6kWh and I'd imagine that (like most UK households) you use more in the winter than in the summer, so if you generate more than 10kWh you'll export the balance.

If you do really well you'll consume 2/3rds of what you generate, for an annual benefit of £461 in your first year. You might be able to export the other 1/3rd at 5p/kWh for an additional £61, a total of £522. Even allowing for 6% annual energy inflation I make it 15 years to pay back.

(I do note that the installer has quoted Social Energy's "Better Together" tariff, which potentially pays 20p/kWh for export. Unfortunately it's not easy to tell exactly what the deal is with Social Energy; their website is big on marketing but light on prices, which makes it impossible to compare.)

It is really hard to compare, I don't think they've even stated a figure.  Why does it have to be so complicated?

Spies

Try contact solar, they seem very competitive. 

Solarchaser

I use double your amount of electricity and have over 20kwh usesble batteries and I still can't consume everything I generate.

Id avoid this company tbh, they sound like charlatans 

Exiled_Tyke

These figures are complete nonsense and the installer knows that. As far as I'm concerned all trust in them has now evaporated so I'd stay well away and look for more reputable (and cheaper) alternatives. 

Meatballs

It took a good few quotes, but eventually got one around the £1/W mark. For premium panels it seemed like 1.5 was reasonable (but not cost effective anyway?).

michaels

runner2021 said:

Hmm glad I asked, sounds like this might be a bit overpriced.  Figures asked for above: 

Installation cost: £11505 incl VAT

Predicted system output: 3660kWh/annum

Current assumed energy cost: 18.83p and predicted energy inflation @6%

Recent annual electric usage: 3490kWh per annum

Predicted on-site energy consumption: 100%

Roof pitch: 35 degrees

Degrees from south: 1 degree
Location: Southampton

10x Suntech Monocrystalline 360W panels (@£3500)

Solax 5.8kW triple power high voltage battery (@£3495)

Social Energy tariff

Guaranteed minimum solar energy output will be 3675kW for the first year

Combined annual average benefit of approximately £2051

Please say if there's anything else I need to include.  Thanks in advance

Don't think you need to be Mensa at maths to figure out that if you produce more than you use then you won't be using 100% of your output.  More likely somewhere between 33% up to 67% as you have a battery is likely to be own consumption, the remainder of output can be sold back to the grid at 5p/unit.  Inflation plus 6% price increases is also a pretty hefty assumption as it would make fuel bills unaffordable for many within a few years.

QrizB

One (other) thing I don't quite get with that quote:

runner2021 said:

10x Suntech Monocrystalline 360W panels (@£3500)

Solax 5.8kW triple power high voltage battery (@£3495)

If the solar panels are £3500 and the battery is £3495, that's £6995 - a reasonable price for the system as offered. So why is the total system price £11500?

Unless that's meant to be the price of the physical panels and all the rest of the kit - inverter roof rails, fitting etc. - is extra, in which case you're really being ripped off. This Austrian website (link) prices suntech panels around 40c/watt, not the £1/watt that your installer is asking. (Bimble Solar have a range of panels at ~35p/watt (link) similar to that Austrian price.)

runner2021

QrizB said:

One (other) thing I don't quite get with that quote:

runner2021 said:

10x Suntech Monocrystalline 360W panels (@£3500)

Solax 5.8kW triple power high voltage battery (@£3495)

If the solar panels are £3500 and the battery is £3495, that's £6995 - a reasonable price for the system as offered. So why is the total system price £11500?

Unless that's meant to be the price of the physical panels and all the rest of the kit - inverter roof rails, fitting etc. - is extra, in which case you're really being ripped off. This Austrian website prices suntech panels around 40c/watt, not the £1/watt that your installer is asking. (Bimble Solar have a range of panels at ~35p/watt similar to that Austrian price.)

Yes there are extras: 

PHOTOVOLTAIC SYSTEM (3.60 kWp) 5% 1,999

ELECSA ELECTRICAL BALANCE OF SYSTEM £501.00

SCHLETTER GERMAN MOUNTING RAILS £515.00

Thanks for the insight