Geographic location creates dramatic performance variations: Solar panel efficiency can vary by 25-40% between different regions, with the “solar belt” between 35°N and 35°S latitude receiving optimal irradiance of 4-7 kWh/m²/day compared to just 2-4 kWh/m²/day in higher. Geographic location creates dramatic performance variations: Solar panel efficiency can vary by 25-40% between different regions, with the “solar belt” between 35°N and 35°S latitude receiving optimal irradiance of 4-7 kWh/m²/day compared to just 2-4 kWh/m²/day in higher. Orientation Impact is Massive: The difference between optimal and poor solar panel placement can impact energy production by up to 30%, making proper positioning one of the most critical factors in maximizing your solar investment return. Temperature. It is true that south-facing solar panels are the most productive for generating solar power in the northern hemisphere, but it's not the only option. Orientation affects how much sunlight your system captures, directly impacting performance, efficiency, and long-term savings. Whether you're in Kent, Essex, Surrey, or elsewhere in the UK, choosing. The feasibility of solar panel installation is often dictated by the existing architecture of a structure, which may not align with the most favorable direction for sun exposure.