Solar panels and battery - any real world recommendations?

timmy85 said:
What is a fair price for a system of that nature then if19k is expensive?
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these are estimated prices for the non-integrated solutions (eg powerwall where the battery and inverter come as a set)

£200 per panel
£1500 per 5kwh battery storage
£1500 for the inverter (regardless of size they're all similar prices)
£500 per set of scaffolding
£500-1000 for miscellaneous bits like DNO approval/bird-proofing etc
(£500 for island mode if required)
 
timmy85 said:
What is a fair price for a system of that nature then if19k is expensive?
Click to expand...

Well if you are getting a Tesla PW3 plus expansion pack that can be had for £9995 installed (it is 2x 13.5kWh correct?), so you are therefore paying another £9k for the solar side of things. I'd say you want to be looking at more like £16k maximum. IMO.
 
Finally got my G99 back after Northern powergrid used every single one of the 45 working days allowed. 9 weeks in total.

6kW export allowed. The inverter is fine.

Will definitely have to use the battery to avoid clipping in summer. Might be a struggle on the sunniest days.

Edit: Actually it's not too bad. PVWatts suggests on a perfect day around the solstice it would only lose 19.2kWh due to clipping. My battery is 18.08kWh and there's other house use I can schedule to then like the heat pump DHW cycle, so it might be fine.
 
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Got a tiny bit of light today so charged my power bank up 10%, that's 0.68p of electricity paid off the £220 total cost for my shed setup. Feeling pretty eco right now...
 
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I've ordered a Lifetime 60282 Outdoor Storage Shed for my back yard. It's made of plastic with some steel support. Wonder if it's a good idea to put 4 solar panels on top. I have two spare EcoFlow Stream microinverters (these things are 92 quid on eBay most of the time), so the whole thing won't cost much.

I think Lifetime have snow load extra support kit - I'll try to find a compatible one with the shed and order it as well. But what would be a good way to mount the solar panels on the plastic roof of the shed?
 
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I've had an alternative price now from someone else for -

19 x Aiko 470W panels
1 x Sigen 6kW Inverter.
1 x 10Kwh Sigen battery
Includes a "free" EV charger and installation too apparently.

For £13k installed.
 
timmy85 said:
I've had an alternative price now from someone else for -

19 x Aiko 470W panels
1 x Sigen 6kW Inverter.
1 x 10Kwh Sigen battery
Includes a "free" EV charger and installation too apparently.

For £13k installed.
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£11-12k would be my estimate - but seeing as you live in the south, £13k is probably acceptable

however i think that inverter is underspecced for that setup? would a 7-8k inverter be preferable else would have lots of clipping
 
Much better price, and as long as they allow room above, the stack is easily expanded if you need more storage.

I'd also suggest increasing inverter size.

Probably a better choice than Tesla, I see a lot of complaints about lack control with Powerwall systems. SigEnergy is a relatively new company, which does concern some people.
 
In which case the 6kw inverter may not be a significant bottleneck. I’ve got 21 430w panels split east to west and I usually peak at around 6kw in full summer sun and heat. It can go higher on cloudy days though, up to the full 8kw but not for more than a few minutes until the panels heat up.

It wouldn’t hurt to get the bigger one and the price difference is negligible. It will also help if you expand the battery storage later down the line.
 
sigenergy do a 8k inverter and i'd ask for the upsize

i have 4.4kwp panels with a 3.6kw inverter - wish i had gone with a 5 kw inverter honestly
the inverter gets really toasty at max loads during the summer (70c+)

and if anything, since you're applying for a g99 already with a 6kw inverter, you can ask for a higher export if you have a 8kw inverter
 
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