Solar panels and battery - any real world recommendations?

gpuerrilla said:
Have you some evidence to back this up?
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Prices in off-peak hours per MW/h are still pretty cheap overnight, with obvious seasonal variations but there is no issue offering cheaper electricity at these times, but suppliers don't want to do this as they lose out on higher margin income to offset losses from last year.
 
teknokid said:
Is there any disadvantage to twin inverters? It’s at no cost to us, and I figured it might give us better cloud coping ability?
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I think it may be better than one, one larger inverter may have a lower capacity than two combined - take a look at the specs, especially how many watts they can invert from the battery.
Also two would keep you running in the unlikely event one had a problem.

If your panels are on two strings, instead of one then may be better if you have shading on one panel etc.
 
I would query how they balance the load together on a single phase, presumably they both respond at the same time to to demand and CT clamp readings so overshoot unless they are sync’d together somehow ?
 
SBo said:
How much are you paying?
I’ve been contemplating an Eddi but have been getting paid more to export on agile than gas costs, until today when unit prices are ~£0 during my peak exporting hours of 12-4!
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The total cost of my system is £11.7k
 
GinG said:
Thanks for that.

I think I will go for the larger battery...I have also asked them to pride me for 2x5.2kwh batteries as a comparison.

So far price is £9522 for 6,370kwh system, 5kwh GivEnergy inverter and 8.2kwh battery.

£8755 with a 5.2kwh battery.
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GinG which company did you go with finally for that price £9522 please?
 
SoliD said:
Pretty much just had the same quote today c. £9k for 6kwh system system, 5kwh inverter and 8.2kwh battery givenergy too. coming round in a couple of weeks to give a formal price as that was just over the phone. @Journey would I be right to assume that going for another battery on top of this would be beneficial?

Currently use about 20-25kwh a day, but no electric car in the house, but plug in hybrid coming in May and as said earlier i'd ideally like to use the AC as my primary heat source. - All cooking is electric.
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Which company please? Their website and phone number will be really helpful. Thank you
 
How has the wiring been accomplished with peoples installs? Are the inverters typically situated in the attic? The inverter > battery or to the consumer unit, how have companies wired it in? All internally? Using a load of conduit? externally?

Any thing to consider in terms of roof loading? Wind etc?
 
Inverter in the loft then passed down through small bedroom, into hallway below then into isolator in porch, then into fuse cupboard because my house wiring is old :D.
 
Just ran a cable down the wall in the corner of the room. It was installed by previous owner. I have since done the room out so will eventually run it in some trunking. Not ideal but functional over form and all that.
 
Journey said:
Prices in off-peak hours per MW/h are still pretty cheap overnight, with obvious seasonal variations but there is no issue offering cheaper electricity at these times, but suppliers don't want to do this as they lose out on higher margin income to offset losses from last year.
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So not due to lots of people charging batteries and cars during the night then...
 
Economy 7 type tariffs will suit solar owners. Will have to prey I can sign up to one reasonable on price after I have mine installed.
 
gpuerrilla said:
Economy 7 type tariffs will suit solar owners. Will have to prey I can sign up to one reasonable on price after I have mine installed.
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I was taking a longer term view, since a solar PV install could be there 25 years, so in that time lots of people will be on BEV's using V2G and V2H where TOU is much better.

I don't plan on moving house again, so my system will be there for a long time, and even if I did move if would still be there as would car charger.
 
Well got my first quote finally back today. A local company to me not a big national one.

13x 390w JA Solar Panels
1x 3.67kw Solis Hybrid inverter
2x 5kWh Puredrive Battery storage units
Installation 2 East and West roofs.
MCS Certificate
IWA Insurance backed warranty - 10 Years

£12,595.49

Might be possible to get more panels on my roof but as this is only a remote survey as my roof have velux windows on 1 side and window dormers on the other.

 
LordVader said:
Well got my first quote finally back today. A local company to me not a big national one.

13x 390w JA Solar Panels
1x 3.67kw Solis Hybrid inverter
2x 5kWh Puredrive Battery storage units
Installation 2 East and West roofs.
MCS Certificate
IWA Insurance backed warranty - 10 Years

£12,595.49

Might be possible to get more panels on my roof but as this is only a remote survey as my roof have velux windows on 1 side and window dormers on the other.

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At that price you are better of just paying for you own kit, even if you end up paying 20% VAT and sorting out an MCS qualified installer. 100% room from improvement, which is sad really as you'd think the more local companies would want to offer better prices to stay relevant.

EDIT: Also seems they are avoiding a G99 application with the inverter choice. Have you asked them why?
 
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@LordVader Imo that is about £2k over par.

I have east, south and west roof arrays and the east and west do a good job, you get a nice full day of production.

Also get a bigger inverter if you can. You can always throttle them back if you’re not allowed to export more than 3.6kw and they cost almost the same.
 
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