{"id":1095,"date":"2025-12-12T11:45:00","date_gmt":"2025-12-12T10:45:00","guid":{"rendered":"https:\/\/blog.fronius.com\/solar-energy\/know-how\/how-do-solar-panels-work-in-winter-facts-tips\/"},"modified":"2026-03-04T13:28:27","modified_gmt":"2026-03-04T12:28:27","slug":"photovoltaics-in-winter","status":"publish","type":"post","link":"https:\/\/blog.fronius.com\/solar-energy\/en\/know-how\/photovoltaics-in-winter\/","title":{"rendered":"Photovoltaics in winter\u2014is it worth it? Facts &amp; tips"},"content":{"rendered":"\n<p><strong><strong>Summer and sun go hand in hand with solar power, but what happens in winter? PV systems are also reliable electricity generators in the winter months, albeit with lower yields because the sun is lower and the days are shorter. However, contrary to popular belief, cold and snow can actually have a positive effect on performance. Read on to find out why this is the case, how do photovoltaics work in winter, how to make your PV system fit for winter, and how to make optimum use of your own solar energy in winter\u2014either for heating or in combination with a battery.<\/strong><\/strong><\/p>\n\n\n\n<!--more-->\n\n\n\n<nav class=\"wp-block-stackable-table-of-contents stk-block-table-of-contents stk-block stk-ecd51d1 stk-block-background\" data-block-id=\"ecd51d1\"><style>.stk-ecd51d1 {margin-bottom:55px !important;}<\/style><p class=\"stk-table-of-contents__title\"><strong>Table of Contents<\/strong><\/p><ul class=\"stk-table-of-contents__table\"><li><a href=\"#warum-photovoltaik-auch-im-winter-funktioniert\">Why photovoltaics also works in winter <\/a><\/li><li><a href=\"#welche-auswirkungen-hat-der-tiefe-sonnenstand-im-winter-auf-die-auslegung-von-pv-systemen\">What effects does the low position of the sun in winter have on the design of PV systems?<\/a><\/li><li><a href=\"#wie-viel-strom-produziert-pv-im-winter\">How much electricity can be produced with PV in winter?<\/a><\/li><li><a href=\"#energieautarkie-im-winter-kommt-auf-den-verbrauch-an\">So is energy self-sufficiency actually possible in winter? It all comes down to consumption.<\/a><\/li><li><a href=\"#schon-gewusst\">Did you know?<\/a><\/li><li><a href=\"#was-macht-eine-pv-anlage-winterfit\">Winterizing your PV system \u200b<\/a><\/li><li><a href=\"#schnee-auf-den-solarmodulen-was-tun\">Photovoltaic System and snow <\/a><\/li><li><a href=\"#checkliste-zur-optimierung-des-eigenverbrauchs-im-winter\">Checklist for optimizing self-consumption in winter<\/a><\/li><li><a href=\"#fazit\">Conclusion<\/a><\/li><\/ul><\/nav>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"warum-photovoltaik-auch-im-winter-funktioniert\"><strong><strong>Why photovoltaics also works in winter<\/strong> <\/strong><\/h3>\n\n\n\n<p>It is easy to explain why a photovoltaic system produces less electricity in the winter months: fewer hours of sunshine mean lower energy output.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"zum-einen-liegt-es-an-der-geringeren-sonnenstrahlung-globalstrahlung\"><strong><strong>Part of the reason is due to lower solar radiation (global radiation)<\/strong><\/strong><\/h4>\n\n\n\n<p>The tilt of the Earth\u2019s axis means that the sun sits lower in the sky in the northern hemisphere during winter. The position of the sun is flatter and the sun\u2019s rays are not perpendicular to the modules but instead are at an acute angle. Less <strong>direct radiation<\/strong> means less energy production per square meter overall. In addition, the intensity of the radiation decreases in winter because the light also travels a longer distance through the Earth\u2019s atmosphere when the sun is low\u2014meaning part of the radiation is absorbed by clouds, dust, water vapor, and other particles on the way.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"zum-anderen-an-den-kurzeren-tageslangen-und-schwierigeren-wetterbedingungen\"><strong>Shorter days and more difficult weather conditions add to the problem<\/strong><\/h4>\n\n\n\n<p>In winter, the days are significantly shorter, which greatly reduces the number of hours with direct sunlight even in clear conditions. Typical wintry weather (more cloud cover, fog, and snow) also contributes to weaker solar radiation.<\/p>\n\n\n\n<p>However, PV systems also use <strong>diffuse radiation<\/strong>. Diffuse radiation does not come directly from the sun but is instead scattered by air molecules or water particles in the atmosphere. It is thanks to this scattered radiation that the electricity production of a PV system remains stable on cloudy, overcast winter days, albeit at a lower yield.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"172\" src=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-1-en-1-1024x172.jpg\" alt=\"\" class=\"wp-image-1127\" srcset=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-1-en-1-1024x172.jpg 1024w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-1-en-1-300x51.jpg 300w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-1-en-1-768x129.jpg 768w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-1-en-1.jpg 1170w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Lower angles of incidence, less direct radiation, and fewer hours of sunshine all affect the yield of a PV system in winter<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"welche-auswirkungen-hat-der-tiefe-sonnenstand-im-winter-auf-die-auslegung-von-pv-systemen\"><strong><strong>What effects does the low position of the sun in winter have on the design of PV systems?<\/strong><\/strong><\/h3>\n\n\n\n<p><a>PV systems with an east-west orientation produce significantly lower yields in the winter months of November, December, and January because, as we have already mentioned, the solar radiation is not at the optimum angle (the sun rises later and is further south). It is also important to consider the geographical location and terrain in the system design, as fog lines, mountains, forests, or nearby buildings can all influence the usable sunshine time. In winter, the maximum yield is achieved during the midday hours.<\/a><\/p>\n\n\n\n<p>Consequently, the modules should be installed at a steeper angle due to the flatter angle of incidence. While rooftop systems with module inclinations of between 10 and 30 degrees are ideal in summer, roof stands with steep mounting angles or fa\u00e7ade systems with modules mounted high on the building offer significant advantages in winter. The latter are also less susceptible to prolonged periods of shade or partial shade in winter.<\/p>\n\n\n\n<p>Additional potential mounting areas such as fences or garden walls can also be optimally utilized with vertically mounted modules. Another advantage is that snow barely sticks to modules in fa\u00e7ade systems and frost thaws more quickly\u2014a practical solution in particularly snow-prone regions.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"525\" data-id=\"1022\" src=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-2-1024x525.jpg\" alt=\"\" class=\"wp-image-1022\" srcset=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-2-1024x525.jpg 1024w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-2-300x154.jpg 300w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-2-768x394.jpg 768w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-2.jpg 1170w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"525\" data-id=\"1028\" src=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-3-1024x525.jpg\" alt=\"\" class=\"wp-image-1028\" srcset=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-3-1024x525.jpg 1024w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-3-300x154.jpg 300w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-3-768x394.jpg 768w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-3.jpg 1170w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>\n\n\n\n<p>Efficient even in winter: vertical PV systems make optimum use of the low angle of the sun.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"wie-viel-strom-produziert-pv-im-winter\"><strong><strong>How much electricity can be produced with PV in winter?<\/strong><\/strong><\/h3>\n\n\n\n<p>From around March to October in our latitudes, an efficient PV system can achieve a high level of self-sufficiency in your own energy supply, especially in summer when a lot of surplus energy can be expected. A south-facing PV system achieves daily yields in summer that are five to six times higher than the dimensioning. For a 10 kWp system, this means around 50 to 60 kWh per day.<\/p>\n\n\n\n<p>In winter, on the other hand, the yield is much lower for the reasons mentioned\u2014 a rooftop system only generates around 10% at this time of year. With a 10 kWp system, this is around one kilowatt hour per day, while a south-facing fa\u00e7ade system of the same size can produce roughly 10 kWh per day. These yields primarily apply to the three months of November, December, and January. The monthly yields from April to September are usually very high, which is why the average annual yield of a PV system is still excellent.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-very-light-gray-to-cyan-bluish-gray-gradient-background has-background\"><thead><tr><th><strong>8 kWp <\/strong><\/th><th>Orientation<\/th><th><strong>East-West 30\u00b0<\/strong><\/th><th><strong>South 30\u00b0<\/strong><\/th><th><strong>South fa\u00e7ade 90\u00b0 (2023)<\/strong><\/th><\/tr><\/thead><tbody><tr><td>January<\/td><td>PV yield<\/td><td><strong>210 kWh<\/strong> (with snow &lt; 100 kWh)<\/td><td>380 kWh<\/td><td><strong>450 kWh<\/strong><\/td><\/tr><tr><td>February<\/td><td>PV yield<\/td><td>370 kWh (with snow &lt; 200 kWh)<\/td><td>580 kWh<\/td><td>600 kWh<\/td><\/tr><tr><td>March<\/td><td>PV yield<\/td><td>680 kWh (with snow &lt; 420 kWh)<\/td><td>920 kWh<\/td><td>790 kWh<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">A comparison of the photovoltaic yield by design shows that a south-facing fa\u00e7ade system can sometimes generate twice as much yield in the winter months, and even three to four times as much if there is prolonged snow cover.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"energieautarkie-im-winter-kommt-auf-den-verbrauch-an\"><strong><strong>So is energy self-sufficiency actually possible in winter? It all comes down to consumption.<\/strong><\/strong><\/h3>\n\n\n\n<p>Covering the entire energy demand in the cold season with photovoltaics alone appears unrealistic, but oversizing your PV system over the whole year is likely to be highly worthwhile. It\u2019s essential to take a range of factors\u2014such as the heating system\u2014into account here. For example, a single-family home with a pellet heating system and consumption of around 8 kWh per day can achieve a high degree of self-sufficiency (up to 90%) in winter, if the PV system is well located and oriented. Conversely, even a low-energy house with a 10 kWp PV system including a heat pump can be expected to achieve a maximum 20% self-sufficiency in winter because the daily electricity demand for the heat pump alone is 10 to 40 kWh.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"planungstipps-fur-maximalen-pv-ertrag-im-winter\"><strong><strong>Planning tips for achieving maximum efficiency with your PV system in winter:<\/strong><\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Select the ideal combination of south and east-west orientation with three strings.<\/li>\n\n\n\n<li>Optimize the module inclination angle for a low sun position\u2014the ideal inclination on the roof for maximum winter yields is 20 to 50\u00b0. Seasonal adjustment is an option thanks to adjustable mounting systems.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"525\" src=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-5-1024x525.jpg\" alt=\"\" class=\"wp-image-1040\" srcset=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-5-1024x525.jpg 1024w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-5-300x154.jpg 300w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-5-768x394.jpg 768w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-5.jpg 1170w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Adjustable PV modules can be set to a steeper inclination to attain maximum winter yields.<\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Consider a south-facing vertical PV system\/fa\u00e7ade system, especially in snowy areas.<\/li>\n\n\n\n<li>Install bifacial solar modules, which can utilize light on both sides. These modules make particularly effective use of the so-called albedo effect\u2014the reflection of bright surfaces such as snow.<\/li>\n\n\n\n<li>If necessary, dimension the photovoltaic system slightly larger (depending on heat pump consumption + 3-5 kWp)\u2014consider the annual balance!<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"schon-gewusst\"><strong>Did you know?<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading has-decoration-background-color has-background\" id=\"arbeiten-pv-anlagen-bei-kalte-tatsachlich-besser\"><strong><strong>Is it true that photovoltaic systems &nbsp;are more efficient in cold weather\u200b?<\/strong><\/strong><\/h4>\n\n\n\n<p class=\"has-decoration-background-color has-background\">Yes, tend to work better at colder temperatures because the ambient temperature has a direct effect on the efficiency of the solar cells.<\/p>\n\n\n\n<p class=\"has-decoration-background-color has-background\">The so-called temperature coefficient is a key performance indicator for solar modules, giving the percentage by which the module\u2019s output increases or decreases per degree Celsius change in temperature compared to the standard test condition (= 25 \u00b0C). Solar modules largely consist of crystalline silicon and have a negative temperature coefficient of approx. -0.3 to -0.5% per degree Celsius. The module output drops by precisely this percentage for every degree Celsius above the test temperature of 25 \u00b0C.<\/p>\n\n\n\n<p class=\"has-decoration-background-color has-background\">Why is that? As temperatures rise, the voltage decreases while the current increases only slightly, resulting in the overall electrical power decreasing because it is the product of voltage and current. Conversely, this means that performance increases as soon as temperatures fall. At low temperatures, the voltage of the modules remains higher and the overall output increases. Chilly sunny days can therefore be more productive than hot summer days.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"was-macht-eine-pv-anlage-winterfit\"><strong><strong>Winterizing your PV system \u200b<\/strong><\/strong><\/h3>\n\n\n\n<p>First things first, regular maintenance and careful monitoring of the photovoltaic system are fundamental to enjoying optimal energy output and longevity. So if you always keep a close eye on your PV system\u2014both online in the monitoring app and directly on the roof\u2014you can respond quickly to irregularities and largely avoid surprises caused by technical problems, even in winter. Tip: carrying out a quick professional check in late fall pays off, ensuring that the system starts the winter season with clean surfaces and full performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"schnee-auf-den-solarmodulen-was-tun\"><strong><strong>Photovoltaic System and snow<\/strong> <\/strong><\/h3>\n\n\n\n<p>Does snow on the modules mean no solar power? Yes and no. Modules can generate electricity with diffuse light, even when covered with a loose layer of snow a few centimeters deep. The heat from the modules together with a greater tilt angle causes snow and ice to melt and slide off unassisted. So the modules usually clean themselves.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"525\" src=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-6-1024x525.jpg\" alt=\"\" class=\"wp-image-1046\" srcset=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-6-1024x525.jpg 1024w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-6-300x154.jpg 300w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-6-768x394.jpg 768w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-6.jpg 1170w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">The inherent heat and inclination of the PV modules means snow usually slides off unaided.<\/figcaption><\/figure>\n\n\n\n<p>But if there is a thick layer of snow deeper than 15 centimeters on the roof, sunlight can no longer penetrate to the photovoltaic modules. In this case, it\u2019s necessary to carefully weigh up the advantages and disadvantages of snow clearance. How high are the actual energy losses and the associated electricity costs?<\/p>\n\n\n\n<p>If it is a matter of higher costs for a short period of time, it may be best to accept this loss rather than hiring a professional snow clearing company. In locations at higher altitudes with consistently high snow loads or where there is a risk due to extremely wet, heavy snow, it\u2019s advisable to remove the snow and relieve the load. Once again, please make sure you only allow professionals with special equipment up on the roof\u2014the risk of accidents is far too great for amateurs. If necessary, clear accessible areas of the system from the ground using soft tools such as snow brushes with soft bristles or telescopic pushers. Never use road salt\u2014the salt particles damage the modules and lead to a loss of performance.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"525\" src=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-7-1024x525.jpg\" alt=\"\" class=\"wp-image-1052\" srcset=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-7-1024x525.jpg 1024w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-7-300x154.jpg 300w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-7-768x394.jpg 768w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-7.jpg 1170w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">You can clear readily accessible PV modules of snow yourself\u2014a specialist company must take care of all the others.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"checkliste-zur-optimierung-des-eigenverbrauchs-im-winter\"><strong><strong>Checklist for optimizing self-consumption in winter:<\/strong><\/strong><\/h3>\n\n\n\n<p><strong>1. Use battery storage:<\/strong><br>Surplus PV electricity is <a href=\"https:\/\/www.fronius.com\/en\/solar-energy\/home-owners\/products-and-solutions\/store-solar-power\" target=\"_blank\" rel=\"noreferrer noopener\">stored in the battery<\/a> during the day and made available later on; in the winter months where there\u2019s little to no PV surplus and with variable tariffs, it makes sense to charge the battery with cheap grid current and then fall back on it when grid current becomes pricier again.<\/p>\n\n\n\n<p><strong>2. Heating and hot water with PV:<\/strong><br>Your own solar power can also be used for heating and generating hot water in winter. Load regulators like the <a href=\"https:\/\/www.fronius.com\/en\/solar-energy\/home-owners\/products-and-solutions\/heating-with-pv\" target=\"_blank\" rel=\"noreferrer noopener\">Fronius Ohmpilot<\/a> use even the smallest amounts of PV surplus to control the heating element in the boiler or buffer tank and keep the water temperature in it constantly high. Coupled with photovoltaics, heat pump operation is also more efficient: The heat pump does not have to switch itself on and off as often, which reduces the load on the entire household heating system and makes it last longer.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"525\" src=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-8-1024x525.jpg\" alt=\"\" class=\"wp-image-1058\" srcset=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-8-1024x525.jpg 1024w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-8-300x154.jpg 300w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-8-768x394.jpg 768w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-8.jpg 1170w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">The Fronius Ohmpilot uses even the smallest amounts of surplus solar energy to heat water.<\/figcaption><\/figure>\n\n\n\n<p><strong>3. Intelligent energy management<\/strong><br>With a monitoring tool such as <a href=\"https:\/\/www.fronius.com\/en\/solar-energy\/home-owners\/products-and-solutions\/solar-monitoring\" target=\"_blank\" rel=\"noreferrer noopener\">Fronius Solar.web<\/a>, you always have an overview of yield and loads, and even hidden power guzzlers in the household, and you can make specific settings to ensure your PV system works even more efficiently.<\/p>\n\n\n\n<p>Intelligent AI-based energy management tools such as the <a href=\"https:\/\/www.fronius.com\/en\/solar-energy\/home-owners\/products-and-solutions\/solar-monitoring\/energy-cost-assistant\" target=\"_blank\" rel=\"noreferrer noopener\">Fronius Energy Cost Assistant<\/a> continuously analyze the expected electricity production, consumption, and current electricity prices, and optimally adapt the battery\u2019s storage strategy accordingly. This makes efficient use of energy resources and effectively saves electricity costs.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"525\" src=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-9-1024x525.jpg\" alt=\"\" class=\"wp-image-1064\" srcset=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-9-1024x525.jpg 1024w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-9-300x154.jpg 300w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-9-768x394.jpg 768w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-9.jpg 1170w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">The photovoltaic system can also be continuously optimized in winter using an app.<\/figcaption><\/figure>\n\n\n\n<p><strong>4. Adjusting the timing of consumption <\/strong><br>If energy-intensive appliances such as washing machines, dishwashers, etc. run when the PV system is producing a lot of solar power\u2014i.e. primarily around midday in the winter\u2014this has a positive effect on self-consumption. In addition, load shifting and changes in your own energy consumption behavior also have an impact on your wallet.<\/p>\n\n\n\n<p><strong>5. Charging an electric car <\/strong><br>Even if the photovoltaic system energy output and surplus are lower in winter than in summer, it makes sense to charge your electric car using your own solar power: once again, it\u2019s important to adjust the daytime charging times to the sunniest hours around midday. Smart charging boxes allow dynamic PV surplus charging and can also automatically use variable electricity tariffs at low tariff times overnight.<\/p>\n\n\n\n<p><strong>Tip:<\/strong> the PV-optimized <a href=\"https:\/\/www.fronius.com\/en\/solar-energy\/home-owners\/products-and-solutions\/e-mobility\/wattpilot-flex-electric-car-charger\" target=\"_blank\" rel=\"noreferrer noopener\">Fronius Wattpilot Flex<\/a> charging solution can automatically switch between 1-phase and 3-phase charging and thereby utilize even the smallest PV surplus of 1.38 to 22 kW\u2014ensuring that no ray of sunshine goes unused, even in winter.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"525\" src=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-10-1024x525.jpg\" alt=\"\" class=\"wp-image-1070\" srcset=\"https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-10-1024x525.jpg 1024w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-10-300x154.jpg 300w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-10-768x394.jpg 768w, https:\/\/blog.fronius.com\/solar-energy\/wp-content\/uploads\/sites\/3\/2025\/12\/se-blog-pv-im-winter-bild-10.jpg 1170w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Energy sector integration allows the efficient use of surplus PV power for heating and mobility in winter.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"fazit\"><strong>Conclusion: <strong>Is photovoltaics worth it in winter?<\/strong> <\/strong><\/h3>\n\n\n\n<p>On the shorter winter days, photovoltaic systems in our latitudes produce significantly less electricity than in summer. However, with appropriate system planning\u2014e.g., with a south-facing fa\u00e7ade system or modules set at higher inclination angles\u2014it\u2019s possible to make the best possible use of the sun even in winter. Smart energy management tools help to efficiently integrate the battery storage system, charging station, and load regulator into the overall energy system and increase self-consumption at the same time. Meaning that a certain degree of self-sufficiency is possible even during the chilly winter months.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Summer and sun go hand in hand with solar power, but what happens in winter? PV systems are also reliable electricity generators in the winter months, albeit with lower yields because the sun is lower and the days are shorter. However, contrary to popular belief, cold and snow can actually have a positive effect on [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":1078,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[110,68],"class_list":["post-1095","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-know-how","tag-photovoltaik-en-2","tag-pv-anlage-en-2"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How do photovoltaics work in winter?<\/title>\n<meta name=\"description\" content=\"Learn how photovoltaics work in winter in our pro guide. 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