KinDzaDza wrote: ↑25 Mar 2022 07:33
Мне надо вложить примерно 25000 в панели, что примерно окупится через 9-10 лет судя по моим счётам за электричество за последние 5 лет. Я пока не вижу смысла их устанавливать.
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Solar panels are brilliant. Depending on where you are in the country, you are looking at returns of 15% to 33% per annum, which is much better than anything in the stock market.
In my case, I originally calculated my repayment period to be 4.5 years, because I went for a larger micro inverter system.
An interesting side affect of solar was being able to track our usage.
The whole family got involved, putting the dishwasher and appliances on time delay until the morning, swapping out lightbulbs for energy efficient ones, being cautious about aircon and making sure that it wasn’t drawing more power than the solar was producing.
Because of our changed behaviour, the solar is actually having faster returns - more of our energy usage is consuming our own generated electricity, and we import less. We are currently being paid about $1.30 a day after all exports/imports/service fees, and I haven’t had a bill to pay in months. Feels great!
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Hydroelectric generation , generating stations can ramp (change their output) much quicker than something like a thermal generating station (such as coal, natural gas, or nuclear) can.
A hydroelectric station can go from zero to full load in a matter of minutes, where a thermal station might take something like eight hours or more. The biggest thermal stations, such as nuclear plants, can take days to do this task.
Despite what your bill would lead you to believe, price of electricity is not actually static.
It fluctuates wildly from minute to minute depending on where power is needed and how it can get there.
The overall demand also isn't constant - it's highest during the day (peak) and lowest late at night (off-peak).
Because thermal stations (like the ones owned by our coal-loving friends in Alberta) take so long to ramp, they have to be operated at a near-constant load level. This means that they tend to be near-capacity during the day, and tend to have large surpluses at night.
But hey, that energy has to go somewhere, so the grid operators will sell it on the open market at rock bottom prices.
This is where the magic of ramping comes in. BCH can selectively reduce load or even shut down generating units entirely, conserving water behind the dams because it's cheaper to buy power from elsewhere at night.
The next day, however, the price of electricity goes up, so BCH stops importing and starts exporting.
Because they saved water behind the dams, they can open the units up full bore and generate a surplus of power, which they can then export to Alberta and the United States.
At this point, the market value of power is actually much higher than normal, so BCH turns a profit, this profit is used to subsidize lower energy rates for the consumer.
