| 1. Solar photovoltaic systems | Commercial rooftops, factories, public facilities, and utility-scale projects | Generates electricity without direct operational greenhouse-gas emissions; can reduce grid-electricity purchases where generation matches demand. | Site solar resource, module performance, system design, product durability, repair options, and end-of-life arrangements | Annual energy yield (kWh), installed cost per kW, performance warranty, degradation rate, and lifecycle emissions per kWh | Output varies by location, shading, orientation, and weather. Compare lifecycle impacts and recycling provisions, not only operational emissions. |
| 2. Onshore and offshore wind power | Wind-rich sites, grid-scale generation, and suitable industrial or community projects | Produces electricity with no direct fuel combustion during operation and can diversify a renewable electricity supply. | Measured wind resource, turbine suitability, grid access, wildlife and habitat assessment, and community engagement | Expected annual generation, capacity factor, availability, cost per MWh, and lifecycle emissions per kWh | Generation is site-dependent and variable. Assess permitting, transmission needs, noise, biodiversity, and blade end-of-life plans. |
| 3. Battery energy storage | Renewable-energy shifting, peak management, backup power, and grid services | Can store electricity for later use and help integrate variable renewable generation; climate benefit depends on charging sources and use. | Chemistry, safety certification, usable capacity, cycle life, efficiency, traceable mineral sourcing, and take-back options | Usable kWh, round-trip efficiency, warranted cycles, retained capacity, safety performance, and cost per delivered kWh | Account for conversion losses, degradation, fire safety, replacement, and recycling. Compare performance under the expected temperature and duty cycle. |
| 4. High-efficiency heat pumps | Building heating and cooling, hot water, and some low- or medium-temperature industrial processes | Transfers heat rather than generating it through direct combustion; can reduce energy use and emissions compared with less efficient heating, depending on the power mix. | Seasonal performance, operating-temperature range, refrigerant global-warming potential, local service capacity, and system compatibility | Seasonal coefficient of performance, annual energy use, peak electrical demand, refrigerant charge, and operating cost | Actual performance depends on climate, system design, insulation, and operating temperatures. Include refrigerant leakage and end-of-life handling in assessments. |
| 5. LED lighting and smart controls | Offices, warehouses, factories, streets, and public buildings | Can reduce lighting electricity use when replacing less-efficient lighting; occupancy and daylight controls can further limit unnecessary operation. | Luminous efficacy, light quality, driver and control compatibility, product lifetime evidence, and replaceable components | Lumens per watt, watts per area, annual kWh, rated operating hours, control coverage, and maintenance cost | Savings depend on the existing lighting and usage pattern. Check glare, flicker, dimming compatibility, and responsible handling of electronic waste. |
| 6. Building energy management systems | Large commercial buildings, campuses, hospitals, and multi-site portfolios | Uses monitoring and controls to identify energy waste and coordinate heating, cooling, ventilation, and lighting more efficiently. | Meter coverage, interoperability, data security, commissioning, occupant comfort, and measurement-and-verification methods | Energy use per floor area, peak demand, fault detection rate, system uptime, and verified savings against a documented baseline | Software alone does not guarantee savings. Evaluate sensor accuracy, ongoing tuning, cybersecurity, data ownership, and staff training. |
| 7. Industrial waste-heat recovery | Manufacturing, power generation, data centers, and facilities with usable process heat | Captures heat that would otherwise be rejected and reuses it for process heating, hot water, or power generation where technically suitable. | Heat-source temperature and consistency, process integration, material compatibility, maintenance needs, and measured net energy gain | Recovered thermal energy, useful heat delivered, fuel displaced, system availability, and payback under actual operating hours | Feasibility depends on the heat source, distance to demand, operating schedule, and fouling or corrosion risks. Include auxiliary energy use in calculations. |
| 8. Water reuse and recycling systems | Industrial facilities, commercial buildings, campuses, and water-stressed regions | Treats suitable wastewater for reuse, potentially reducing freshwater withdrawals and wastewater discharge. | Required water quality, treatment reliability, local permits, energy and chemical use, monitoring, and residuals management | Freshwater displaced (m³), reuse rate, treated-water quality, energy per m³, and system downtime | Match treatment to the intended use and local standards. Assess concentrate or sludge disposal, public-health safeguards, and lifecycle water impacts. |
| 9. Precision irrigation and soil-moisture monitoring | Agriculture, nurseries, landscaping, and managed green spaces | Uses field data and targeted delivery to help apply water closer to crop or landscape needs, potentially reducing avoidable water use. | Sensor calibration, local agronomic suitability, data connectivity, ease of maintenance, and compatibility with existing irrigation equipment | Water applied per area, water productivity, soil-moisture accuracy, crop yield or quality, and pump energy use | Results depend on crop, soil, weather, and management. Validate against a baseline and avoid over-irrigation or unintended impacts on crop yield. |
| 10. Recycled and low-carbon construction materials | Buildings, infrastructure, packaging, and product manufacturing | May reduce demand for virgin resources or embodied emissions when recycled content or lower-impact production is verified and fit for purpose. | Verified environmental product declarations, recycled-content evidence, durability, safety compliance, supply traceability, and end-of-life recyclability | Embodied emissions per functional unit, recycled-content percentage, service life, material yield, and reuse or recycling rate | Compare equivalent performance and use consistent lifecycle boundaries. Recycled content or a “low-carbon” label alone does not establish lower total impact. |