Solar PV Analysis of Watford, United Kingdom
Watford, England, United Kingdom is a decent location for solar energy production throughout the year, but it's not perfect. This location can generate an average of 5.13 kilowatt-hours (kWh) per day in the summer, 4.36 kWh/day in the spring, 2.31 kWh/day in autumn and only 1.07 kWh/day in winter for each kilowatt of installed solar.
This means that solar panels will produce more energy during spring and summer when there are longer daylight hours and more direct sunlight. However, they will produce less energy during autumn and winter due to shorter days and less intense sunlight.
To get the most out of your solar panels all year round at this location, you should tilt them towards the south at an angle of about 44 degrees. This angle maximizes exposure to sunlight throughout different times of the year.
However, there are some factors that could hinder your solar panel's performance here in Watford.
Firstly, given that Watford is located within a temperate zone where cloud cover can be frequent especially during winter months which could reduce amount of sunlight reaching your panels hence reducing their output.
Secondly, snowfall although rare could also affect your panel’s efficiency as it may cover them up blocking out sun rays completely until cleared off manually or melted away by sun heat when weather improves
Lastly local buildings or trees might cast shadows on your panels particularly if they are located east or westwards from these obstacles which might reduce their effectiveness especially early morning or late afternoon when sun is low on horizon
To mitigate these issues:
- You can install a device to track daily movement of sun across sky ensuring maximum exposure
- Regular cleaning to remove dust or snow off surface
- If possible locate them far from tall structures or tree lines
In terms of topography; flat areas are ideal as hills might block early morning or late afternoon sun rays depending on direction they face.
In conclusion, while Watford isn't the perfect place for solar energy production due to its weather and environmental conditions, it's still a viable location if you take the necessary precautions.
Note: The Northern Temperate Zone extends from 35° latitude North up to 66.5° latitude.
So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 911 locations across United Kingdom. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in United Kingdom by location
Solar output per kW of installed solar PV by season in Watford
Seasonal solar PV output for Latitude: 51.6552, Longitude: -0.3879 (Watford, United Kingdom), based on our analysis of 8760 hourly intervals of solar and meteorological data (one whole year) retrieved for that set of coordinates/location from NASA POWER (The Prediction of Worldwide Energy Resources) API:
Ideally tilt fixed solar panels 44° South in Watford, United Kingdom
To maximize your solar PV system's energy output in Watford, United Kingdom (Lat/Long 51.6552, -0.3879) throughout the year, you should tilt your panels at an angle of 44° South for fixed panel installations.
As the Earth revolves around the Sun each year, the maximum angle of elevation of the Sun varies by +/- 23.45 degrees from its equinox elevation angle for a particular latitude. Finding the exact optimal angle to maximise solar PV production throughout the year can be challenging, but with careful consideration of historical solar energy and meteorological data for a certain location, it can be done precisely.
We use our own calculation, which incorporates NASA solar and meteorological data for the exact Lat/Long coordinates, to determine the ideal tilt angle of a solar panel that will yield maximum annual solar output. We calculate the optimal angle for each day of the year, taking into account its contribution to the yearly total PV potential at that specific location.
Seasonally adjusted solar panel tilt angles for Watford, United Kingdom
If you can adjust the tilt angle of your solar PV panels, please refer to the seasonal tilt angles below for optimal solar energy production in Watford, United Kingdom. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 44° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 35° South in Summer | 55° South in Autumn | 65° South in Winter | 44° South in Spring |
Our recommendations take into account more than just latitude and Earth's position in its elliptical orbit around the Sun. We also incorporate historical solar and meteorological data from NASA's Prediction of Worldwide Energy Resources (POWER) API to assign a weight to each ideal angle for each day based on its historical contribution to overall solar PV potential during a specific season.
This approach allows us to provide much more accurate recommendations than relying solely on latitude, as it considers unique weather conditions in different locations sharing the same latitude worldwide.
Calculate solar panel row spacing in Watford, United Kingdom
We've added a feature to calculate minimum solar panel row spacing by location. Enter your panel size and orientation below to get the minimum spacing in Watford, United Kingdom.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - Minimum Spacing:
We add the shadow length to the horizontal space occupied by tilted panels.
This approach ensures maximum space efficiency while avoiding shading during critical times, as the Winter solstice represents the worst-case scenario for shadow length.
Topography for solar PV around Watford, United Kingdom
Watford, United Kingdom, is located in the southeast of England and is part of the greater London area. The topography around Watford consists mainly of gently rolling hills and flatlands. It's not a mountainous region, it's more characterized by suburban development, parks and some agricultural lands.
For large-scale solar PV installations, flat or gently sloping areas are typically preferred as they reduce installation costs and maximize sunlight exposure. Given this criterion, potential suitable areas near Watford might include:
1) Agricultural lands: These areas often provide large open spaces that are well-suited for solar installations. However, it's important to consider the impact on local farming activities.
2) Industrial zones: Large rooftops or unused grounds in industrial zones can be ideal for solar panel installation due to their size and lack of shading from trees or buildings.
3) Brownfield sites: These are previously developed lands that may have been contaminated with hazardous substances. Converting these sites into solar farms can be both environmentally friendly and economically viable.
4) Landfills: Similar to brownfield sites, closed landfills can also provide ample space for installing solar panels without impacting other land uses.
5) Alongside transportation routes such as highways or railways which often have wide strips of unused land alongside them.
Ultimately though, suitability would depend on a range of factors including local planning regulations, proximity to power grids for electricity transmission/distribution purposes etc., so a detailed feasibility study would need to be conducted.
United Kingdom solar PV Stats as a country
United Kingdom ranks 14th in the world for cumulative solar PV capacity, with 13,689 total MW's of solar PV installed. This means that 4.00% of United Kingdom's total energy as a country comes from solar PV (that's 20th in the world). Each year United Kingdom is generating 203 Watts from solar PV per capita (United Kingdom ranks 25th in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in United Kingdom?
Yes, there are several incentives for businesses wanting to install solar energy in the United Kingdom. The UK government offers a Feed-in Tariff (FiT) scheme which pays businesses for every unit of electricity they generate from their solar panels. Additionally, businesses may be eligible for tax reliefs such as Enhanced Capital Allowances and Renewable Heat Incentives. Finally, some local authorities offer grants or other financial support to help businesses with the cost of installing solar energy systems.
Do you have more up to date information than this on incentives towards solar PV projects in United Kingdom? Please reach out to us and help us keep this information current. Thanks!
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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Monday 18th of March 2024
Last Updated: Monday 21st of July 2025
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Compare this location to others worldwide for solar PV potential
The solar PV analyses available on our website, including this one, are offered as a free service to the global community. Our aim is to provide education and aid informed decision-making regarding solar PV installations.
However, please note that these analyses are general guidance and may not meet specific project requirements. For in-depth, tailored forecasts and analysis crucial for feasibility studies or when pursuing maximum ROI from your solar projects, feel free to contact us; we offer comprehensive consulting services expressly for this purpose.
Helping you assess viability of solar PV for your site
Calculate Your Optimal Solar Panel Tilt Angle: A Comprehensive Guide
Enhance your solar panel's performance with our in-depth guide. Determine the best tilt angle using hard data, debunk common misunderstandings, and gain insight into how your specific location affects solar energy production.
