https://wattcurious.com/ Renewable energy, explained for the curious. en Mon, 21 Sep 2026 00:00:00 GMT https://wattcurious.com/wind-hydropower/why-wind-turbines-stop-in-strong-wind https://wattcurious.com/wind-hydropower/why-wind-turbines-stop-in-strong-wind Mon, 21 Sep 2026 00:00:00 GMT Wind & Hydropower A gale carries more energy than a turbine can safely take. Why output flattens at rated speed, how blades shed power, and what cut-out really protects. https://wattcurious.com/wind-hydropower/why-wind-turbines-have-three-blades https://wattcurious.com/wind-hydropower/why-wind-turbines-have-three-blades Mon, 21 Sep 2026 00:00:00 GMT Wind & Hydropower Three blades is the fewest that loads a rotor evenly while capturing nearly all the energy available. Why two shakes, why four barely helps, and what it costs. https://wattcurious.com/solar-energy/why-solar-panels-lose-efficiency-in-hot-weather https://wattcurious.com/solar-energy/why-solar-panels-lose-efficiency-in-hot-weather Mon, 21 Sep 2026 00:00:00 GMT Solar Energy Heat costs voltage, not light. What warming does inside a silicon cell, how to read the temperature coefficients, and why the hottest days are not the best. https://wattcurious.com/solar-energy/why-is-my-solar-system-producing-less-power https://wattcurious.com/solar-energy/why-is-my-solar-system-producing-less-power Mon, 21 Sep 2026 00:00:00 GMT Solar Energy Most shortfalls are not faults. How to work out what output to expect, read the day curve, compare strings, and separate ordinary losses from real problems. https://wattcurious.com/geothermal-heat-pumps/why-does-my-heat-pump-freeze-up https://wattcurious.com/geothermal-heat-pumps/why-does-my-heat-pump-freeze-up Mon, 21 Sep 2026 00:00:00 GMT Geothermal & Heat Pumps Frost on a heat pump is usually normal and self-clearing. How defrost works, what separates ordinary frost from a fault, and why ground loops freeze too. https://wattcurious.com/wind-hydropower/what-is-the-betz-limit https://wattcurious.com/wind-hydropower/what-is-the-betz-limit Mon, 21 Sep 2026 00:00:00 GMT Wind & Hydropower No open-flow rotor can capture more than 59.3% of the wind's power. The derivation in full, what the limit does not say, and where it does not apply. https://wattcurious.com/batteries-storage/what-is-depth-of-discharge https://wattcurious.com/batteries-storage/what-is-depth-of-discharge Mon, 21 Sep 2026 00:00:00 GMT Batteries & Storage Depth of discharge is how far you empty a battery each cycle. Why deeper cycles cost more than their share, and how usable capacity is really chosen. https://wattcurious.com/next-gen-off-grid/what-is-agrivoltaics https://wattcurious.com/next-gen-off-grid/what-is-agrivoltaics Mon, 21 Sep 2026 00:00:00 GMT Next-Gen & Off-Grid Crops and panels on the same land, working because plants stop using extra light long before panels do. The physics, the microclimate and the design variables. https://wattcurious.com/batteries-storage/what-happens-to-excess-solar-energy https://wattcurious.com/batteries-storage/what-happens-to-excess-solar-energy Mon, 21 Sep 2026 00:00:00 GMT Batteries & Storage Surplus solar has four possible destinations and one of them is never being produced at all. How curtailment, storage, export and diversion actually work. https://wattcurious.com/batteries-storage/what-does-a-battery-management-system-do https://wattcurious.com/batteries-storage/what-does-a-battery-management-system-do Mon, 21 Sep 2026 00:00:00 GMT Batteries & Storage A pack of cells in series is only as good as its worst cell. How a BMS measures, balances, estimates and protects — and what it cannot rescue. https://wattcurious.com/next-gen-off-grid/tidal-energy-vs-wave-energy https://wattcurious.com/next-gen-off-grid/tidal-energy-vs-wave-energy Mon, 21 Sep 2026 00:00:00 GMT Next-Gen & Off-Grid Tides are a clock, waves are weather. How each resource works, why predictability changes everything, and why survival loads dominate both. https://wattcurious.com/solar-energy/string-inverters-vs-microinverters-vs-power-optimizers https://wattcurious.com/solar-energy/string-inverters-vs-microinverters-vs-power-optimizers Mon, 21 Sep 2026 00:00:00 GMT Solar Energy Three architectures, one question: where does maximum power point tracking happen? How that choice changes shading response, monitoring, failure modes and access. https://wattcurious.com/wind-hydropower/pelton-vs-turgo-vs-cross-flow-turbines https://wattcurious.com/wind-hydropower/pelton-vs-turgo-vs-cross-flow-turbines Mon, 21 Sep 2026 00:00:00 GMT Wind & Hydropower Three impulse turbines, three ways of catching a jet. How bucket shape sets the head and flow each suits, and why part-flow efficiency decides real installations. https://wattcurious.com/solar-energy/on-grid-vs-off-grid-vs-hybrid-solar-systems https://wattcurious.com/solar-energy/on-grid-vs-off-grid-vs-hybrid-solar-systems Mon, 21 Sep 2026 00:00:00 GMT Solar Energy Three architectures answering one question: what happens when the sun is not shining. Why a grid-tied array goes dark in an outage, and what hybrid actually adds. https://wattcurious.com/solar-energy/monocrystalline-vs-polycrystalline-vs-thin-film https://wattcurious.com/solar-energy/monocrystalline-vs-polycrystalline-vs-thin-film Mon, 21 Sep 2026 00:00:00 GMT Solar Energy The difference is how the silicon atoms are arranged — or whether there is silicon at all. What crystal structure costs, what it buys, and when it matters. https://wattcurious.com/batteries-storage/lfp-vs-nmc-vs-lead-acid-battery-life https://wattcurious.com/batteries-storage/lfp-vs-nmc-vs-lead-acid-battery-life Mon, 21 Sep 2026 00:00:00 GMT Batteries & Storage LFP normally outlasts NMC, and both outlast lead-acid in daily cycling. What ages each chemistry, and why duty cycle matters more than the badge. https://wattcurious.com/solar-energy/how-to-clean-solar-panels https://wattcurious.com/solar-energy/how-to-clean-solar-panels Mon, 21 Sep 2026 00:00:00 GMT Solar Energy Dirt costs output, but the wrong cleaning method costs the module. What soiling does to light, what damages glass and coatings, and a method built around both. https://wattcurious.com/next-gen-off-grid/how-to-calculate-home-energy-load-off-grid https://wattcurious.com/next-gen-off-grid/how-to-calculate-home-energy-load-off-grid Mon, 21 Sep 2026 00:00:00 GMT Next-Gen & Off-Grid Energy, continuous power and surge are three different numbers, and an off-grid system has to satisfy all three. The method, the losses, and where estimates fail. https://wattcurious.com/batteries-storage/how-temperature-affects-solar-batteries https://wattcurious.com/batteries-storage/how-temperature-affects-solar-batteries Mon, 21 Sep 2026 00:00:00 GMT Batteries & Storage Cold takes capacity you get back; heat takes life you do not. What happens inside a cell at each extreme, and why charging cold is the real hazard. https://wattcurious.com/batteries-storage/how-pumped-hydro-storage-works https://wattcurious.com/batteries-storage/how-pumped-hydro-storage-works Mon, 21 Sep 2026 00:00:00 GMT Batteries & Storage Storage as a hill: the equation, the reversible pump-turbine, where the round-trip losses go, and why a machine made of water responds in seconds. https://wattcurious.com/solar-energy/how-partial-shade-affects-solar-panels https://wattcurious.com/solar-energy/how-partial-shade-affects-solar-panels Mon, 21 Sep 2026 00:00:00 GMT Solar Energy Why shading one cell costs far more than its share, what a bypass diode actually does about it, and why the direction a shadow runs decides the damage. https://wattcurious.com/wind-hydropower/how-offshore-wind-farms-send-electricity-to-shore https://wattcurious.com/wind-hydropower/how-offshore-wind-farms-send-electricity-to-shore Mon, 21 Sep 2026 00:00:00 GMT Wind & Hydropower A submarine cable behaves nothing like an overhead line. Why AC export runs out of room with distance, what HVDC buys, and where the crossover sits. https://wattcurious.com/wind-hydropower/how-micro-hydro-power-works https://wattcurious.com/wind-hydropower/how-micro-hydro-power-works Mon, 21 Sep 2026 00:00:00 GMT Wind & Hydropower Two measurements decide a micro-hydro site. How head and flow become power, why gross head is never net head, and what a flow duration curve really tells you. https://wattcurious.com/geothermal-heat-pumps/how-geothermal-heat-pumps-work https://wattcurious.com/geothermal-heat-pumps/how-geothermal-heat-pumps-work Mon, 21 Sep 2026 00:00:00 GMT Geothermal & Heat Pumps A ground-source heat pump moves heat between a building and the soil using a refrigerant cycle. Why the shallow ground is such a good source, and what sets the COP. https://wattcurious.com/geothermal-heat-pumps/ground-source-vs-air-source-heat-pumps-in-cold https://wattcurious.com/geothermal-heat-pumps/ground-source-vs-air-source-heat-pumps-in-cold Mon, 21 Sep 2026 00:00:00 GMT Geothermal & Heat Pumps In deep cold an air-source heat pump loses capacity just as demand peaks, while a ground loop barely notices. What that costs, and what modern machines changed. https://wattcurious.com/next-gen-off-grid/green-vs-blue-vs-grey-hydrogen https://wattcurious.com/next-gen-off-grid/green-vs-blue-vs-grey-hydrogen Mon, 21 Sep 2026 00:00:00 GMT Next-Gen & Off-Grid The colours describe how hydrogen was made, not the gas. Steam reforming, carbon capture and electrolysis compared by chemistry, energy and emissions. https://wattcurious.com/solar-energy/do-solar-panels-work-on-cloudy-days https://wattcurious.com/solar-energy/do-solar-panels-work-on-cloudy-days Mon, 21 Sep 2026 00:00:00 GMT Solar Energy Yes — panels run on diffuse light, not sunshine. How much output cloud really costs, why rain often helps, and how to tell weather from a fault. https://wattcurious.com/geothermal-heat-pumps/closed-loop-vs-open-loop-geothermal https://wattcurious.com/geothermal-heat-pumps/closed-loop-vs-open-loop-geothermal Mon, 21 Sep 2026 00:00:00 GMT Geothermal & Heat Pumps One circulates its own fluid forever; the other pumps groundwater through and returns it. The heat-transfer gain, the water chemistry, and how to choose. https://wattcurious.com/solar-energy/can-hail-damage-solar-panels https://wattcurious.com/solar-energy/can-hail-damage-solar-panels Mon, 21 Sep 2026 00:00:00 GMT Solar Energy Module glass survives most hail — but the expensive damage is the kind you cannot see. What the test standard proves, and what to check after a storm. https://wattcurious.com/solar-energy/best-tilt-angle-and-direction-for-solar-panels https://wattcurious.com/solar-energy/best-tilt-angle-and-direction-for-solar-panels Mon, 21 Sep 2026 00:00:00 GMT Solar Energy One cosine decides how much light a panel collects. Why latitude sets the starting point, how flat the optimum really is, and what tilt does besides catch light.