Its crazy that in 1999 "home solar" was a fancy, new millennium idea, and now we're still barely any closer.
Honestly, I think building regulations should mandate solar energy for homes.
Honestly, I think building regulations should mandate solar energy for homes.
Anecdotally, a ton of solar has gone up in the last four years here in Germany, both rooftop and, increasingly, in what were likely canola fields for biodiesel along highways - at first driven by Russia's invasion of Ukraine and the need to reduce natural gas consumption, but now by how absolutely cheap those panels are. Too bad they're not being made here...
My favorite installation so far: a large field in SW Germany, with the panels high enough for cattle to wander and grass to grow under them. The cattle were almost all under those panels, munching away - it was a hot day.
So i would have to disagree. We are significantly far ahead from the initial “idea”.
It happens all the time...
People have home solar, but it's hardly widespread. It's still a "fancy" thing to have.
But also, due to infrastructure. Everyone who could afford it has had a battery and inverter in our homes since forever. Hooking up some solar panels to it is relatively straightforward.
I think there are also some state sponsored subsidies involved although I couldn’t tell you how much.
In the last year, 2.11% or 308 MWh of our electricity came from solar: https://app.electricitymaps.com/map/zone/GB/12mo/monthly
By way of comparison, that same source shows Germany generating 2.16% (527 MWh) of its electricity from solar so its pretty similar: https://app.electricitymaps.com/map/zone/DE/12mo/monthly
I had solar installed last year, at the end of the summer, it cost roughly £14,000 for a system that can produce 6.51kWp and with 12kWh of battery storage (about 10kWh usable).
The 465W all-black panels (14 of them) I had installed are a little under £100 each to buy off-the-shelf, that accounts for 10% (£1400) of the cost of my system.
The batteries and inverter together another roughly £3.5k, so, about £9k of that cost was not for "solar and battery tech", a good chunk of it, somewhere around 40% of the total was labour, and the rest in scaffolding. Even if we allocate say another £1k to "hardware"; rails, wire, switchgear etc, that's still £8k easily.
Even if the hardware was free, £8-10k installation costs seems prohibitively expensive for the average UK household, unless you were totally wiping out your monthly bills and could pay it off over the lifetime of the system.
I suspect part of the issue in Australia is the same; I believe (perhaps incorrectly) you have a lot more sun down there so I'd expect the scale of (number of) installations to be higher.
What size inverter? Is it a hybrid inverter? 10kWh of Storage is 8-9kWh usable because batteries are only warrantied to 80-90% depth-of-discharge, is that enough?
Since there's only ~5.6kWp of panels in that quote it's probably over-provisioned, and it will likely come with a smaller inverter, say 3.6kW, which is what a lot of these cheaper companies will do, and export will be limited under G98 to 3.68kW.
That also means that in peak sun, your 5.6kW of panels are going to clip at the inverter capacity and you won't be able to access more than that limit in power.
£200 per extra panel isn't bad, the company I went with charged £300, but mine came with per-panel optimisers (at my request, mainly for the monitoring functionality rather than optimisation). If I wanted to add an additional elevation though, that would be per-panel cost plus ~£2000 for the additional elevation of scaffolding.
If you're going for one of these installations and haven't already, ask these questions, and if you can get a decent price that's great, I wish you luck. I'm not on reddit so I can't comment on the quality of that sub.
My system is larger than typical for a UK home, I also paid a premium to have it installed by a company with an excellent reputation for their work, I'd had a new roof the week before and wanted a high quality installation.
I also went with a company that let me decide how I wanted it installed; other companies wanted to put the batteries in my loft or under the stairs which was an absolute no from me, I don't want them inside my home, and I had them install the batteries and inverter in a brick out house on the opposite end of the property to where the consumer unit is, again, at a premium.
I had per-panel optimisers and monitoring hardware installed, and because I wasn't aware of it until later, I added the bird-mesh on after signing the contract and did get ripped off on that part (NOTE: if you get solar in the UK, and have ever so much as seen a pigeon, get bird mesh).
It's also worth noting that checking today, all of the hardware has dropped in price, my panels are now 20% cheaper, batteries are 15% cheaper, inverter is 10% cheaper, and I imagine installations and labour might be cheaper in the winter than the peak of summer like I had mine installed.
All of that said, the total cost of installation doesn't really matter so much as the ROI, which for me works out at most ~6 years, if none of the hardware fails in the meantime.
EDIT: There's a mistake in my previous comment which I based all of the subsequent numbers on; the cost of 2 batteries + inverter was closer to £5k not £3.5k.
https://www.aemo.com.au/energy-systems/electricity/national-...
https://en.wikipedia.org/wiki/Solar_power_by_country#Global_...
https://elements.visualcapitalist.com/top-20-countries-by-ba...
Australia > all of Europe (yes all of Europe, not just EU) combined on that one.
Despite Australia's high solar and battery penetration Australia's electricity generation is fairly high emissions.
https://app.electricitymaps.com/map/5y/monthly
France and Sweden have considerably lower emission electricity generation than Australia does.
They had a huge specially-made array of lead acid batteries, a backup wood-fired stove for cooking when their power went out, a refrigeration setup where they had to child-lock the fridge during an outage so visitors wouldn't open it and spoil their milk, and no grid connection (which wouldn't have easily allowed residential exports until the late 90s anyway). They also had no cooling other than a fan and windows, and wood heating.
It's honestly pretty impressive how far we've come. Particularly in Australia, where we're world leaders in home solar capacity but are lagging behind in utility-scale renewables, it's really breathtaking to see the country go from 44kWh to 1880kWh per capita capacity in 15 years based mostly off incentivised rooftop solar.
[1] https://www.greenlancer.com/post/california-solar-mandate
[2] https://www.energy.ca.gov/programs-and-topics/programs/calif...
You can go out and buy solar panels to cover your roof for a few thousand dollars/pounds/euros. You could definitely not do that in 1999.
That's insane. I cannot fathom how anyone with a home isn't doing it ASAP.
Even here in Maine, a smaller system will pay for itself rapidly and offset the high energy costs.