Riverside, California is a pretty good place for generating power from the sun. Throughout the year, there's a decent amount of sunlight to convert into electricity using solar panels. In simple terms, during summer and spring, you'll get more energy because the days are longer and sunnier. On average in summer, each kilowatt of installed solar can generate about 7.85 units (kWh) of electricity per day while in spring it's slightly less at around 7.07 units per day.
The energy production dips a bit in autumn and winter when days are shorter and there might be more cloud cover. In autumn, you can expect about 5.26 units per day for every kilowatt of installed solar and this drops further to around 3.88 units during winter.
To make the most out of your solar panels throughout the year here at Riverside, it's best to tilt them towards south at an angle of approximately 30 degrees - this will allow them to catch as much sunlight as possible across all seasons.
As far as local factors that could affect your solar panel performance go - like weather or environmental conditions - Riverside doesn't have too many challenges compared to other places but there are some things worth considering:
1) Dust & Debris: Like any other outdoor equipment, dust or debris on your panels can block sunlight which reduces their efficiency over time so regular cleaning is important.
2) Heat: While sunny days are great for producing power from solar panels too much heat isn't – high temperatures can actually reduce their efficiency so providing some sort of cooling mechanism may be beneficial.
3) Local Wildlife: Birds or squirrels could potentially cause damage by nesting under or chewing on wiring respectively so consider installing guards if this becomes an issue.
By taking these factors into account when installing your system you should be able maximize its potential throughout the year in Riverside!
Note: The Northern Sub Tropics extend from 23.5° latitude North up to 35° latitude.
So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 4253 locations across the United States. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in the United States by location
Solar output per kW of installed solar PV by season in Riverside
Seasonal solar PV output for Latitude: 33.9449, Longitude: -117.3834 (Riverside, United States), 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 30° South in Riverside, United States
To maximize your solar PV system's energy output in Riverside, United States (Lat/Long 33.9449, -117.3834) throughout the year, you should tilt your panels at an angle of 30° 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 Riverside, United States
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 Riverside, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 30° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 18° South in Summer | 39° South in Autumn | 48° South in Winter | 27° 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 Riverside, United States
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 Riverside, United States.
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 Riverside, United States
Riverside, United States is located in Southern California. It is situated within the Inland Empire metropolitan area of the state. The topography around Riverside includes rolling hills and flat plains with a few mountainous regions to the north and east. The city itself lies on relatively flat terrain.
The surrounding areas are mostly composed of semi-arid desert lands which receive a significant amount of sunshine throughout the year, making them potentially ideal for large-scale solar PV installations.
Areas that could be most suited for large-scale solar PV include:
1) Desert regions nearby: These areas typically have high sun exposure and low cloud cover throughout the year, making them excellent locations for large-scale solar farms.
2) Unused agricultural land: While care must be taken not to disrupt important farmland, there are often unused or less productive agricultural lands that can be converted into solar farms.
3) Rooftops in urban or industrial areas: Large buildings such as factories or warehouses often have expansive rooftop spaces that can accommodate many solar panels.
4) Brownfield sites: These are previously developed sites that may be contaminated but could potentially be cleaned up and used for renewable energy projects like solar farms.
In all cases, considerations would need to include accessibility (proximity to roads and power lines), environmental impact assessments, potential impacts on local communities including any benefits such as job creation, etc.
United States solar PV Stats as a country
United States ranks 2nd in the world for cumulative solar PV capacity, with 95,209 total MW's of solar PV installed. This means that 3.40% of United States's total energy as a country comes from solar PV (that's 26th in the world). Each year United States is generating 289 Watts from solar PV per capita (United States ranks 15th in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in United States?
Yes, there are several incentives for businesses wanting to install solar energy in the United States. These include federal tax credits, state and local rebates, net metering policies, and renewable energy certificates (RECs). Additionally, many states have enacted legislation that requires utilities to purchase a certain amount of electricity from renewable sources such as solar.
Do you have more up to date information than this on incentives towards solar PV projects in United States? 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: Tuesday 23rd of April 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.




