The usual selection of solar panels for RV:
The advantage is that after overhead installation, there is a certain space with the roof to make the air convection in the space. It can avoid direct sunlight on the roof and save part of the electric energy of the air conditioner in summer; The price is a little cheaper.
Disadvantages: high installation requirements, not beautiful enough.
The advantages are beautiful, low-key and relatively convenient installation. Note: the lower the temperature of the solar cell, the higher the efficiency. It is attached to the roof flexibly, which is not conducive to heat dissipation, and the efficiency is lower.
The disadvantages are: low efficiency and high price.
In addition, the power of solar panels in practical application can only reach 70% of the rated power. However, most of the solar panels installed on the roof of the RV can only be tiled, which is difficult to form the best irradiation angle with the sunlight. In this way, 20% – 30% of the power will be lost.
Therefore, the actual output power of RV solar panel is about half of the nominal rated power. So, when RV riders choose solar panels, try to have a large number and a large area.
Due to the easy expansibility of solar power generation and the limited roof area of RV, folding portable solar panels came into being. It is not only convenient to carry, but also a good supplement to solar power generation. It is also a good choice for everyone.
Working principle of solar system
The direct output voltage of solar energy is generally 12V, 24V and 48V. In order to provide electric energy for 220V electrical appliances, it is necessary to convert the DC electric energy generated by the solar power generation system into AC energy through the inverter. In some cases, when a variety of voltage loads are required, DC-DC inverter should also be used, such as converting 24V Electric energy into 5V electric energy, The converted electric energy can be used directly or stored in the battery for emergency.
Household appliance power and one-day power consumption of RV
1. The 21 inch TV has a power of about 50 watts. It is expected to be used for 10 hours a day. The cumulative power consumption is 500 watts, about 0.5 kwh!
2. The 90-liter refrigerator can be used all day, and the cumulative power consumption will not exceed 0.5 degrees（ Generally, it is recommended to use the interposer, so that the start-up time of the refrigerator can be controlled and will not exceed 0.2 degrees in a day)
3. A 100 watt notebook (usually 60 watts) is expected to be used for 5 hours a day, with a cumulative power consumption of 500 watts, about 0.5 kwh.
4. The 800 Watt rice cooker has a volume of 4L. It is expected to be used twice a day for half an hour. The cumulative power consumption is 400 watts, about 0.4 kwh.
5. The 900 watt electric pressure cooker is expected to be used twice a day for half an hour, with a cumulative power consumption of 450 watts, about 0.45 kwh.
6. The electric water heater of about 800 Watts has a volume of 4L. It is expected to be used three times a day for 5 minutes each time. The cumulative power consumption is 200 watts, about 0.2 kwh.
7. 10 watt LED lamps, calculated according to the quantity of 3, use for 5 hours a day, and the cumulative power consumption is 150 watts, about 0.15 kwh.
8. The 500 Watt resistance wire electric furnace (electromagnetic furnace is not recommended, with high power and high power consumption) is expected to be used twice a day for 20 minutes each time, with a cumulative power consumption of 350 watts, about 0.35 kwh.
9. According to an air conditioner, it is about 1000 watts for an hour. If it is turned on for 5 hours, it will consume about 5 degrees of electricity. Of course, these are only part of RV electrical appliances. There are still many places where RV needs electricity, so a good way to solve RV power consumption is very important. Solar energy may not completely solve these problems, but it is indeed the most ideal RV power auxiliary equipment at present!
Tips for solar energy use of RV
1. Installing solar panels is not just a matter of casual installation. You need to calculate how many watts of solar panels you need according to the power consumption of your RV appliances, and then calculate how much battery you need according to the power reserve you need for about days, and then see whether the calculated solar panels can meet the demand of roof area, whether the design is reasonable.
2. For the installation of solar panels, it should be noted that: first, you can’t step on it; Secondly, it can not be covered.
3. When buying solar panels, you must install a controller to prevent the battery from being over flushed and over-discharged. Otherwise, when you don’t need the car for a few days, and the light is just enough these days. If you don’t have a controller, you keep charging the battery. Overcharging means that your battery has a high probability of being scrapped prematurely.
4. The installed solar panels should preferably form a certain angle with the roof, so that it is easier to absorb sunlight. Some motorists measured that the conversion efficiency of tiled solar panels is much lower than that of angle installation.
