# Possibilities of Powering Military Equipment Based on Renewable Energy Sources
## 3 Conclusions  
Currently, significant development and innovations in the use of renewable energy sources is ongoing, especially with regard to mobile solar-wind power plants and the use of photovoltaic panels. Various sectors of the economy, groups of people, and various organizations are interested in solutions in this field. Unique structures and solutions are created to improve the efficiency of systems, as well as to develop the possibilities of putting them in use and reducing the production costs. The economic evaluation of the use of renewable energy sources shows the disadvantages and advantages of such a solution. The main disadvantages are:  
1. High dependence on weather conditions.
2. Solar panels cannot be charged at night.
3. Power plants should have shock resistance and a construction that will provide protection against mechanical damage.
4. It should take up to 10 min for the power plant to start up.
5. The service is for a maximum two soldiers.  
Advantages of using solar-wind generators:
1. Independence from power grid infrastructure.
2. Mobility of solutions.  
* Economy of gasoline or oil used today by power generators, which may use 4-20 L during an hour of operation (depending on the power). With 20 h of operation, you save 80-400 L of fuel per day for one piece of equipment (cost 100-500 Euro/day).
* No need to refuel generators with fuel.
* No noise during operation.
* Protection of the natural environment.
* Charged batteries can be used multiple times.
* Provision of power for the soldier's armaments and military equipment as well as command posts.  
According to the authors, the cost of implementing renewable energy sources should allow for significant fuel savings. The simple design of the devices will result in their quick repair or replacement of damaged elements. It is likely that their use will become widespread. Research is underway on solutions that are very light and mobile and will provide energy. Their availability will depend on the price and needs of soldiers.  
The study reviews contemporary solutions in the field of photovoltaic panels and mobile solar-wind power plants, which have either generated the interest of various armies or are already operational. Their task is to provide electricity based on renewable energy sources and primarily for the various parts of command posts. These systems are used by the armed forces of Germany, the United Kingdom, Greece, and the USA. Along with the development of technology, solutions are chosen to enable the development of large-area and high-power mobile power systems in a short time. The concept of a personal power supply device for a soldier has been presented. Attention has been focused on unmasking the possibilities of PV panels, which leave a clear thermal trace during operation. Further research envisages the development of a personal power supply device, the construction of a model for this device, and field tests of the model by soldiers.  
[PERSON] supervised the investigations and took part in elaboration of the article conceptualization, investigation methodology, and writing the article. [PERSON] and [PERSON] performed measurements and took part in elaboration of the article conceptualization, [PERSON] and L.W. validation of the model and writing the article. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
Not applicable.  
The authors declare no conflict of interest.