Rahat, Southern District, Israel presents a highly favorable location for year-round solar photovoltaic energy generation, with consistently strong performance across all seasons despite some seasonal variation.

Seasonal Solar Performance

The location delivers excellent solar energy output throughout the year, with summer being the peak season at 8.31 kWh per day per kW of installed solar capacity. Spring follows as the second-best performing season at 7.26 kWh per day per kW, making these two seasons ideal for maximum solar generation. Autumn produces moderate output at 5.15 kWh per day per kW, while winter represents the lowest production period at 3.64 kWh per day per kW of installed capacity. Even during the winter months, the solar output remains substantial compared to many other global locations, indicating that Rahat maintains good solar conditions year-round. The relatively high spring and summer figures demonstrate that this location can capitalize on the region's abundant sunshine during the optimal solar months.

Optimal Panel Installation

For maximum year-round energy production at this location, solar panels should be installed at a fixed tilt angle of 27 degrees facing south. This angle has been calculated to optimize total annual solar output by accounting for the sun's varying elevation throughout the year and weighting these angles against actual solar irradiance data.

Environmental and Weather Challenges

Several significant local factors can impact solar production efficiency in Rahat and require careful consideration during installation:

• Desert dust and sand accumulation on panels, which can significantly reduce energy output
• Occasional sandstorms that deposit heavy layers of particulate matter
• High ambient temperatures that can reduce panel efficiency despite strong sunlight
• Potential for strong winds during certain weather events

Preventative Measures for Enhanced Performance

To maximize solar energy production despite these challenges, several preventative measures should be implemented during installation. Regular cleaning systems or easy-access designs for manual cleaning are essential to combat dust accumulation, as even thin layers can substantially reduce output. Installing panels with adequate spacing and ventilation underneath helps manage the high ambient temperatures that can otherwise reduce efficiency. Robust mounting systems designed to withstand strong winds ensure system longevity and consistent performance. Consider automated cleaning systems or schedule regular maintenance during the peak production seasons of spring and summer to ensure optimal performance when generation potential is highest. Water-efficient cleaning methods are particularly important given the arid climate conditions in this region.

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 100 locations across Israel. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Israel by location

Solar output per kW of installed solar PV by season in Rahat

Seasonal solar PV output for Latitude: 31.3962, Longitude: 34.7588 (Rahat, Israel), 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 27° South in Rahat, Israel

To maximize your solar PV system's energy output in Rahat, Israel (Lat/Long 31.3962, 34.7588) throughout the year, you should tilt your panels at an angle of 27° 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 Rahat, Israel

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 Rahat, Israel. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 27° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
15° South in Summer	36° South in Autumn	46° South in Winter	24° 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 Rahat, Israel

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 Rahat, Israel.

Our calculation method

1. Solar Position:
   We determine the Sun's position on the Winter solstice using the location's latitude and solar declination.
2. Shadow Projection:
   We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle.
3. 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 Rahat, Israel

Topographical Features of the Rahat Region

Rahat sits in the northern Negev Desert of southern Israel, positioned within a relatively flat to gently undulating landscape that characterizes much of this arid region. The immediate area around the city features low-lying terrain with minimal elevation changes, creating an expansive plateau-like environment that stretches across the desert floor. This topography consists primarily of sandy and rocky desert surfaces interspersed with low hills and shallow wadis (dry riverbeds) that occasionally channel seasonal rainfall.

The terrain gradually rises toward the east and southeast, where the landscape begins its transition toward the more mountainous regions of the central Negev. To the west and northwest, the land remains predominantly flat, extending toward the coastal plain. The soil composition in this area is typical of desert environments, featuring a mixture of sandy loam, rocky outcrops, and areas of harder desert pavement known locally as hamada.

Vegetation in the region is sparse and consists mainly of drought-resistant shrubs, scattered acacia trees, and seasonal desert grasses that emerge following rare rainfall events. The overall landscape presents an open, unobstructed environment with excellent exposure to solar radiation throughout most of the year, making it particularly well-suited for renewable energy development.

Optimal Areas for Large-Scale Solar Development

The expansive flat terrain surrounding Rahat offers numerous excellent opportunities for large-scale solar photovoltaic installations. The most promising areas lie to the west and southwest of the city, where the topography remains consistently level across extensive stretches of undeveloped desert land. These areas provide the ideal combination of minimal slope variation, stable ground conditions, and freedom from significant topographical obstacles that could create shading issues.

The northwestern quadrant of the region presents particularly attractive conditions for solar development, featuring broad expanses of relatively hard-packed desert surface that would require minimal ground preparation for large installations. The absence of significant vegetation or agricultural activity in these areas reduces potential land use conflicts while providing clear access for construction and maintenance activities.

Areas to the immediate south and southeast of Rahat also show strong potential, though developers would need to account for the gradually increasing elevation and slightly more varied terrain in these directions. The eastern approaches, while still feasible for solar development, present more challenging conditions due to the increasing presence of wadis and rocky outcrops that could complicate large-scale installations.

The region's generally stable geological conditions, combined with its arid climate and minimal precipitation, create an environment where solar installations would face fewer weather-related challenges compared to more temperate regions. The lack of significant water bodies, forests, or protected natural areas in the immediate vicinity further enhances the development potential for renewable energy projects across much of the surrounding landscape.

Israel solar PV Stats as a country

Israel ranks 29th in the world for cumulative solar PV capacity, with 2,555 total MW's of solar PV installed. This means that 4.70% of Israel's total energy as a country comes from solar PV (that's 17th in the world). Each year Israel is generating 277 Watts from solar PV per capita (Israel ranks 16th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Israel?

Yes, there are several incentives for businesses wanting to install solar energy in Israel. The Israeli government offers a variety of financial incentives and subsidies for businesses that install solar energy systems. These include grants, tax credits, and low-interest loans. Additionally, the government has implemented a feed-in tariff program which guarantees a fixed price for electricity generated from renewable sources such as solar power. This helps to ensure that businesses can recoup their investment in solar energy over time.

Do you have more up to date information than this on incentives towards solar PV projects in Israel? Please reach out to us and help us keep this information current. Thanks!

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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.