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Davo456 wrote: »
So, I have a 3KwH solar array which I've happy with.
Would something like this, make economic sense ?
ok, its not as pretty as the Tesla ones, but I think I could mount it quite easily in the loft perhaps.
I haven't found any real feedback on the company or the equipment on-line, and it does seem quite reasonably priced ? or is it too cheap to be any good ?
Any feedback would be much appreciated.
Martyn1981 wrote: »
I can save about £120pa from reduced leccy import savings and £30pa by then being able to switch to a no-standing-charge account. So a 10yr warranty gives me £1,500 to play with, but a 20yr warranty gives me £3,000 to play with, even though it may be the same battery, same cycles etc.
Electricity imported - 94kWh (123kWh in August 2016)
Generated - 309kWh ( 326kWh in August 2016)
Battery discharge - 93.91kWh
ImmerSUN diversion - 47.64kWh (95kWh in August 2016)
Bit of context - we were away on holiday or the first week of August, and then the kids were away from home for another 10 days, so probably our electricity and hot water demand were a bit lower than typical. Again shy of 100kWh/month, and if I average across the 9months of install so far I'm avoiding importing 73kWh/month. At current electricity import prices this battery will take at least 10 years to recover its costs - which is longer than the warrantied life-cycle of the batteries. Starting to feel like an expensive and futile experiment! Certainly feeling like a 4kWh battery isn't quite big enough for my daily usage, probably 6kWh would be a better size.
Maybe I should look again at variable-rate tariffs and perhaps consider an additional night-time charge-up on an economy7-type cheap rate?
The battery degradation model used in the study was developed after tests were carried out on LiNiCoAlO2/C6 18650-type cells, meaning a Lithium Nickel Cobalt Aluminum Oxide battery was used. The STA has stated this chemistry is not suitable to use in this application as it has a "low number of discharges", adding that its “short lifecycle and rapid degradation rate is well understood”.
“For domestic solar PV applications, a battery that can discharge over 10,000 times is needed (like Lithium Phosphate or Lithium Titanate). Fundamentally the study seems to show us what the industry already knows - that choice of battery is vital and this is not a suitable battery for a PV installation,” the statement adds.
Nearly two-thirds of all solar storage systems sold in Germany come from these four suppliers. According to EuPD Research, about 16,800 photovoltaic storage systems were sold in the country in the first half of the year. Falling prices and an attractive rooftop market are driving demand upwards.
theboylard wrote: »
Couple of bits in this piece concern me
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