RE: AS OF 1125 today13 Dec 2022 01:23
I know Mr Sebas evangelistic energy presentations seem very compelling, but it's full of spin, averages, generalisations and exaggerations.
I believe there is benefit in cheap solar and wind energy. I believe ther may be some role for battery storage. I think the prospect of Most people being able to have a solar/wind/battery off grid installation is a pipe dream with current technology.
I have a solar system on my roof. I am just fitting a multi kva lifepo4 storage system to maximise savings.
So I have spent quite a bit of time analysing usage, availability and cost.
I use 130 Kwh per day currently. It is cold. Most of this is heating and with a heat pump returning an average cop under winter conditions of 3.15 I could reduce this demand to 50 Kwh. The average daily output of my panels at this time of year would not meet 10% of this. I would need a significant wind generator, planning permission would be unavailable to all those not in isolated rural locations. So a battery would need to store summertime energy for winter use- not possible as my total yearly generation is less than my total usage.My roof is 75% solar panels, there is the garden but even that completely solared would be unlikely to meet the shortfall. I would also need a storage capacity of 60% of yearly capacity to utilise all summer surplus in the winter. A battery of just over £100,000 would store sufficent to enable it's full utilisation. It might not however cover with a sufficient margin for a poor year. Without wind a self sufficient energy system is not viable domestically in the united kingdom.
He further claims that solar is just cents per watt. When I insatlled mine 10 years ago it was £2.10 per watt.
A neighbour has recently been quoted for a similar size system at £1.10 per watt. Not cents per watt and certainly not a 80% drop in prices in 10 years.
Industry will probably be paying cheaper rates, no doubt, but he promotes the idea of off grid small standalone year round generation.
It may be viable in some countries but not here.
He goes on to say thsat nowhere in the world needs more than 3-4 days of storage with wind/solar/batteries. He then later explains the scenario for Germany where he stipulates 110 hours of battery storage. Contradicting himself in minutes.
There is a great future for renewable energy as an add on to conventional in some geographical areas and as a main source in others until a new technology emerges. ( fusion). The idea he peddles of it being a low cost upgrade for all people in all places is absolute green fairy insanity.