The battery provided by solar energy has very little energy. Coupled with the higher cost, this is not cost-effective.
Or in other words, if you buy a more expensive energy-saving refrigerator, but in terms of electricity saved, the extra money you have to pay for electricity compared to the purchase of a regular refrigerator can be paid for. during 10 years. In other words, you can only recover the cost after 10 years, which is not very cost-effective.
The power of a tricycle is around 300 watts and the power of the solar panel is around 100 watts.
When a 12V battery is charged with a solar panel, the charging voltage. is 18V. Four 25W 18V battery boards are connected in series to form a voltage of 72V, which can charge a 48V battery. The price is about 1,500 yuan.