The energy yield versus domestic consumption from our home solar 4.3 kWp roof top array over a recent 24 hour period when the house was empty. It’s an interesting graph (to me at least) in terms of intermittency versus baseload during a sunny windless high pressure winter’s day in Ireland. During the solar load period, most of the energy was exported to the grid as mircogen whilst during offload, the power was imported to maintain “system services” in the house. It’s likely most other roof top systems in my area, county, country and region experienced the same phenomena given the regionality and intermittency of weather - ie weather systems occur at a regional scale…. So batteries or interconnection are generally touted as the solution which feels a bit like H2 electrolyses as a solution to curtailment of wind - great but you need a lot of localised electrolyser capacity to harvest the wind energy peaks - that capacity will be generally be redundant but will still have to be paid for by someone…. I am installing some electrical storage capacity (though as a geo, I do have concerns about lithium sourcing); I really wonder how the energy system will evolve/balance/cope with more and more intermittent inputs but fewer material energy management instruments…
John O'Sullivan’s Post
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Project & Operations Manager | Onshore Drilling (Geothermal) / Offshore Deepwater (Oil And Gas) | Sustainability, Energy Transition & ESG | Ghostwriter, Copywriter & Digital Marketer | M&A Advisor
2moInteresting data John and as you point out intermittent - in addition to the batteries, you could also consider diverting the energy to the hot water tank - essentially another battery that is often overlooked. 🤔