Many touring car players come to the conclusion that the electricity on the touring car is less and less sufficient through long-term experience. Yes, because with the development of science and technology, when we travel, we will carry a lot of electronic equipment in the car, resulting in more and more places using electricity. Not enough electricity has become a pain point for many RV players.
In order to solve this problem, more and more RV manufacturers have begun to include solar charging system into the optional column of car purchase, which has also attracted many potential buyers of RV. How to choose solar panels? How high-power solar panels are suitable for installation? Today, let’s talk about the solar panels of RV.
The electric energy supply in the RV basically comes from four aspects, namely, battery, driving generator, external 220V power supply and solar charging system, so the solar charging system plays an important role in the RV.
Many RV players will install a set of solar panels after buying a new car, although it seems not difficult to install the solar charging system, many riders don’t know how high-power RV solar panels need to be installed? Is the higher the installed power, the better?
Do you need to install solar panels?
At present, most players will install solar panels. From a practical point of view, it is a good choice to install a set of solar panels on the RV. Clean solar energy is used to generate electric energy to supplement the RV. If you use an RV for a long time and often travel outside, solar energy is even more important.
How much power does the RV need?
Many riders don’t know how much power solar panels should be installed. In fact, this problem completely depends on the actual situation of their own power consumption.
Let’s take C7 RV as an example: if C7 is calculated according to its body length of 6m and width of 2m, the overall area of the roof is about 6m × 2 = 12 (square meters). Except for the space occupied by the overhead forehead area, outdoor unit of air conditioner, overhead skylight and satellite TV antenna, the roof of RV has a usable area of about 5 square meters.
The optional solar panels on the C7 factory roof can be installed with 6 solar panels under the condition that they are not covered by other equipment. The power is in the range of 300w-400w. It can ensure the normal operation of interior lighting equipment and other small household appliances.
Working principle of the solar system
The use of solar energy in RV is mainly to absorb the sunlight through the solar panel laid on the roof, and then convert it into AC for daily use through inverter. 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 energy generated by the solar power generation system into AC energy through the inverter.
In some cases, when a variety of voltage loads need to be used, DC-DC inverter also needs to 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.
How much electricity can solar panel generate in a day?
If the rated power of the solar panel is 400W, under the condition of standard light intensity and battery power shortage, the theoretical power storage capacity in one hour is 400W ÷ 18V × 12V × 1H = 0.267kw · h, which is often referred to as 0.267kwh. If it is calculated according to the average illumination of 6 hours per day. Then 0.267kw · H × 6 = 1.602kw · h, about 1.6 kwh.
After calculation, we can see that in theory, a group of 400W solar panels can produce 1.6 kwh of electricity a day. If the light intensity and intermediate loss of electric energy are included, the charging efficiency is calculated according to 70%, and the actual charging capacity in a day is 1.6 ×. 0.7 = 1.12 kwh.
So what electrical appliances can this 1.12 kwh electricity undertake for normal operation? For a self-propelled C-type RV within 6 meters, the total lighting equipment of the RV is temporarily calculated as 100W. The combined power of 80W refrigerator, 80W LCD TV, 30W laptop and mobile phone is about 300W, that is to say, these electrical equipment can work together for 1.6 ÷ 0.3 = 5.3 hours. Now you should understand, so many professional players will recommend that you choose solar energy between 300-400w.
