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Solar is now ‘cheapest electricity in history’, confirms IEA (International Energy Agency) (from 2020)
(www.carbonbrief.org)
this post was submitted on 12 Nov 2023
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Technology
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that battery is way too big for the energy produced by the solar array
Yet the battery could produce more savings than the solar.
Electricity prices can vary by time of day, as demand varies. Charge it at cheap-o-clock, use it at normal times, you make savings.
It can produce more savings sure in terms of electricity costs, but when including capital, solar is presently much more cost effective. In my area some 6.8kw panels have a four year ROI.
This is entirely regional though. The further you are from the equator, the more seasonal variation there is in sunlight levels, and heating/cooling loads. Around here our solar production is minimized during the season when our energy needs are maximized. We also don’t have variable rate billing, though we only get partial credit for excess generation, so battery storage will never pay for itself until something changes.
95% of what we generate during the goes to the battery and once fully charged we can go days without needing to recharge it
and then your solar panels are doing anything for you in days. you seem to have been offered a very bad deal. I suggest you find other company to analyse your case
Nope that's literally the only way you can make solar viable here. We get no credits or anything for the excess power we generate and we use hardly any power during the day. So literally any excess power the panels generate goes to waste. And if we go to a smaller unit the money we save is negligible again
You do get paid for unused solar, it's just less than it used to be. The idea is that you're meant to shift your loads to the day. Even without the additional feed in, 6.6kw only costs 2.5k and pays itself off within 4 years if you're shifting your loads to the solar peak
Also, it feels like you've installed an overly big battery system.
Panels and batteries are subsidised here in Victoria and the panels only costs 2500aud for a 6.6k system. Most people spend 20k on batteries or less
How can we shift our peak power use when no one is there to use it?. Again we did all the math even with the company and we all came to the same figure. If we did solar only then the system would cost us more in the long term as we still need to draw power during our peak usage. Battery was the only way to make it viable.
You can get devices which hook into your smart meter and measure energy usage, and optimise for that.
The reason you don't get much feedin anymore (unless you're a Virtual power plant, at times more power is needed), is because previously, people were just generating too much excess power during the day, and forcing non-renewables to turn on again at night (so it was pointless). Ideally, you should be trying to export 0kwh back to the grid