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Solar lamps offer significantly increased energy efficiency, making them cheaper to operate while delivering the same high brightness performance.Comparison 1:
Commercial power lamps are difficult to install: There are complicated operation procedures in the project of commercial power lamps. 1. Laying of cables: excavation of cable trenches, laying of dark pipes, threading in tubes, backfilling and other basic works. 2. Long time of installation and debugging: if any line has problems, it must be reworked in a large area.
Other difficulties such as complexity of topography and wiring, the high cost of manual and auxiliary materials.
Solar power lamps are simple to install: Instead of laying complicated wires, the solar power lamps are installed with only two steps: a cement base followed by fixed stainless steel screws.Comparison 2:
High electricity cost of commercial power lamps: There are high fixed electricity charges in the work of municipal lighting lamps; It also requires long-term consistent maintenance or replacement of lines and other configurations, and the maintenance cost increases year by year.
No electricity cost of solar power lamps: Solar lighting is a one-time investment with long-term benefits and low maintenance cost.Comparison 3:
Safety risks of commercial power lamps: Due to construction quality, landscape engineering transformation, material aging, abnormal power supply, conflicts of water and electrical pipeline and other causes, there are a lot of safety risks.
No safety risks of solar power lamps: Solar lamps are ultra-low voltage products, whose operation is safe and reliable.
Other advantages: environmentally friendly, which can add new selling points for the development and promotion of advanced ecological community; Sustainable reduction of property management costs, reduce the owners’ share of public cost.
To sum up, solar lighting is safe and without safety risk, energy saving and no consumption, environmentally friendly, simple installation, automatic control and maintenance free.
Solar photovoltaic power generation need comprehensive consideration of various factors. To make the best cost-effective products, only master the accurate information can decide the installation of panels, the minimum power and specifications (the effective daily capacity of solar panels must outstand the load power consumption), battery capacity, performance and control mode. Wrong estimation of relevant factors will directly affect the performance and cost of independent photovoltaic power generation system.
（1）Site location: location, latitude, longitude, altitude, etc.
（2）Meteorological conditions of the installation site: calculate the total solar radiation amount per month, direct radiation amount (or sunshine percentage), annual average temperature, the longest consecutive rainy days, maximum wind speed, special meteorological conditions such as hail, snow and other.
（3）Maximum load: the daily working time and average power consumption of the load, and the working time of continuous cloudy and rainy days.
（4）Electricity characteristics of load: the output current of solar array is DC. If the load is AC, the load needs to be converted by inverter. Doing so causes the energy loss of supply from solar energy to load, and therefore the solar cells needed more. This will make solar power systems more expensive.
（5）Requirements of AC load: in addition to requiring larger solar panels for ac load, requirements for inverters also vary with load. Generally speaking, the inverter requirements of pure resistance load (such as heating wire) are not high, ordinary modified wave inverter will be good. But inverter requirements of television and electric motor are relatively high, thus the inverter power and the output characteristic need to be high. Those situations need high-power sine wave inverter to guarantee the load works normally. Different loads require various cost.
（6）Usage limitations: some countries and regions have specific environmental requirements for batteries. Nickel-cadmium batteries, in particular, are restricted in Europe and the United States. There are also restrictions on the transport of lead-acid batteries. These factors will lead to increased cost of solar photovoltaic products.