Solar panels and battery - any real world reccomendations?
- Thread starter GinG
- Start date
The maximum price they will charge you per kWh of energy on Agile regardless of the wholesale price
Yea it's disgraceful.
Soldato
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I think someone wants a referral! 
Soldato
- Joined
- 21 Jul 2005
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- Officially least sunny location -Ronskistats
In before thread title is update to "no referrals". 
Seriously though when do we think Octopus will up their new GO rates? Price cap for October due to be announced by the regulator at the end of Aug. Have they changed immediately following the announcement previously for new fixed tariffs eg GO or waited until the cap change?
I want to be on it for winter when I’ll start night charging my batteries but not summer when I’m exporting.
Oh yeah, you are on Agile right now, sorry I forgot. No idea if they'll put it up again, but the savings are pretty significant if you are using say 1500kWh to charge the packs over 120 days/nights at night at 7.5p vs the 40p day rate, that is a saving of £487 alone.
I have a quote for a 10 x 390w system with SolarEdge hybrid inverter and optimisers. It will be on a flat roof so looking at an integrated fixing system (so more expensive than a sloped roof or flat roof ballast system). Total cost is coming around £9k all in. Based in Essex and total annual estimated production will be 3.6MW. This is the cheapest quote I have so far but I still think the quote is on the high side and will try to negotiate, but what would be a reasonable price for this system in todays market for SE England?
Any reason why it's to be an integrated system?
To keep the weight on the roof down to a min - with this system total weight will be approx 400kg, and a ballast system well over a tonne. It's only a garden room roof so would like to avoid that much weight on the roof if I can.
Integrated isn't quite the right word,they'll use penetrating roof mounts - been looking at these for mine, but they are quite expensive, I've designed my own system which I'm confident won't leak.
It's a garage, so no internal ceiling which makes it simpler.
It's a garage, so no internal ceiling which makes it simpler.
I'm having PV across two flat roof areas, one garage and the other garden room gym and they are ballast types.
What is the roof area and type of roof support/spaces as even with over 1000Kg it's surprising what it reduces loadings to be per square meter.
Fair point - roof is approx is 7m x 4m (28sqm). Looking at flat roof joists span tables - on a C24 47mm x 170mm joist at 400mm centers, it would support a load of 50kg/m2 so 1.4 tonnes in total. Not sure if that's the right way of looking at it?
Regardless, excluding the roof fixings, the quote is coming in at £7500. I also checked and it is not a hybrid inventor. What would be a sensible price given today's market?
Yes that's pretty much it assuming you've used your span as 4m.
With regards to price, on a standard system you'd normally be looking at between 4.5kto 5k and optimisers (Tigo) around another 0.5k (around 5-5.5k total).
However, the system you are quoted does usually seem to carry a slight premium, so maybe someone else could confirm, but I wouldn't have expected another 2k though.
£9k. Damn, glad I did it myself.
I 3d printed my own mounts because I didn't want heavy weights on the flat roof, or anything penetrating the membrane.
My mounts are glued to the roof / screwed into the brickwork. As far as I can see there's nothing like what I did available commercially.
Just keep in mind, this is very close to what you're getting fitted, with slightly better quality panels, higher power inverter.
I 3d printed my own mounts because I didn't want heavy weights on the flat roof, or anything penetrating the membrane.
My mounts are glued to the roof / screwed into the brickwork. As far as I can see there's nothing like what I did available commercially.
Just keep in mind, this is very close to what you're getting fitted, with slightly better quality panels, higher power inverter.
3KW SOLAR PANEL PV KIT SYSTEM WITH SOLAREDGE MICRO INVERTERS | eBay
1 x 3000 Central inverter, SOLAREDGE latest model HD WAVE (new with 12 years manufacturers warranty). 11x P350 Solaredge micro inverters/optimisers (new with manufacturers warranty). 3KW SOLAR PHOTOVOLTAIC (PV) SYSTEM.
www.ebay.co.uk
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Do you really need the SolarEdge and have you had a quote without? What’s the shading/orientation issues like? It’s all about breakevens, yes you will generate a bit more with optimisers but will it offset the additional cost? There’s lots on the web about how modern panels don’t benefit nearly so much from optimisers, worth a Google.
My system with 3 split orientations needed them, I saved £1500 by going for Tigos and Tigo monitoring over SolarEdge.