We’re in the midst of a massive cleantech revolution. Solar power is beginning to disrupt the hell out of the power industry. Electric vehicles are on the verge of putting gasmobiles to sleep. Wind power is already one of the cheapest options for new electricity generation in the world — if not the cheapest. The movement is exciting to watch. And, in a decade or so, we might need to change our name from Solar Love to Electricity Love. The solar revolution is certainly one of the more exciting things to watch. Below is some solar number fun that should get your blood pumping. Full disclosure: much of the legwork for this piece was done by one of our excellent readers — we’ll just call him Solar Love advisor #1.
Low Solar Prices Around the World
EU solar without subsidies as low as $1.20/watt: Deutsche Bank has reported that about ⅓ of small- to mid-sized solar installations in the EU are now going in without subsidies. Furthermore, “Multi-megawatt projects were being built south of Rome for €90c/W,” as RenewEconomy notes. “This was delivering electricity costs (LCOE – with 80 per cent self consumption) of around €80/MWh (€8c/kWh).” That’s about $1.20/W and 10–11¢/kWh.
UK solar down to $1.59/watt: The UK’s largest solar far, a new 34-megawatt solar farm near Leicestershire in the English Midlands, is said to cost just over one pound a watt ($1.59/W). That’s about 20% less than the UK’s Department of Energy and Climate Change number for large-scale solar in 2012.
Spain unsubsidized solar down to $1.47/watt: A completely unsubsidized 250 MW solar farm being developed in the northwestern region of Cádiz, Spain, is reportedly going to come in at €275 million, which would be about €1.1/watt or $1.47/watt.
Germany’s average solar PV price at $2.08/watt (unsubsidized): The Photovoltaik-Preisindex from photovoltaik-guide.de has the average solar power system price in Germany (including utility, commercial, and residential solar PV system) at €1.56 ($2.08) in July. The lowest price it hit on that index was €1.50, or $2.00/watt, in February.
India solar farm comes in at $1.52/watt: Shifting over to India, the price is not all that different from the UK and Spain. A 100-megawatt solar farm in the Ramanathapuram district of Tamil Nadu is supposed to cost ₹920 billion ($15.16 million at the moment), which would be about $1.52/watt.
Australia getting/giving rooftop solar for as low as $1.90(USD)/watt for residential solar (before subsidies): Since I’ve used USD above, I’m using it here, too. Solar Choice’s July Solar PV Price Index indicates a before-subsidy low of AUD$2.06/watt (USD$1.90/watt) for residential solar. After relevant feed-in tariffs, the low is AUD$1.38/watt (USD$1.27/watt). The AUD$2.06/watt low was in both Western Australia and Tasmania. The after-subsidy low of AUD$1.38/watt was in Western Australia (Perth). After incentives, the average price of residential solar down under was AUD$1.76/watt (USD$1.62/watt) in July. Impressive.
Translating To ¢/kWh, And The US Situation
The $/watt numbers are interesting, but what we often want to know is actually ¢/kWh. That helps us compare to our electricity bills and to other types of power plants. To do a location-based comparison, we also need a solar insolation map. Given that the largest number of our readers are American (as well as the two of us writing this article), we’ve decided to focus on the US in this section.
Using 20-year, 5% financing, the EIA’s 1c/kWh projection for fixed O&M (no subsidies), and the US solar insolation map above, we get these numbers:
$1.20/W =
- 7.3¢ per kWh in Zone 5 (4.2 solar hours, 17.5% capacity — Northeast/Midwest)
- 5.8¢ per kWh in Zone 2 (5.5 solar hours, 23% capacity — Southwest)
$1.50/W =
- 8.3¢ per kWh in Zone 5
- 7¢ per kWh in Zone 2
$2.00/W =
- 11.4¢ per kWh in Zone 5
- 9.9¢ per kWh in Zone 2
To put that into better perspective, the average price of electricity in the US was 11.8¢ per kWh in May, according to the EIA. (And, assuming 3% inflation, the 20-year average cost of electricity would be 16¢ per kWh.)
- In New York, the average price of residential electricity was 18.3¢ per kWh.
- In Illinois, it was 10.5¢ per kWh.
- In Michigan, it was 14.2¢ per kWh.
- In Florida (which is in Zone 4 of that solar insolation map), it was 11.3¢ per kWh.
- In California (which is mostly in Zone 3, but partly in Zones 1, 2, and 4), it was 15.8¢ per kWh.
- In Texas (which is mostly in Zone 3, but partly in Zone 2), it was 11.2¢ per kWh.
In other words, the average price of residential electricity in the above states (and the US on average) is considerably higher than solar at $1.50/watt or even $2.00/watt over 20 years, and the case would get even better if you included the rising electricity prices that are projected by basically everyone in the industry. (For non-residential electricity prices or prices for other states, check out the full EIA spreadsheet.)
Basically, when we could get to Australia’s or Europe’s solar price level, solar will blow up across the US even more so than is happening today.
