Founded in 1987, Sangle was formerly known as the Solar Energy Research Office of the Energy Research Institute of Shandong Academy of Sciences, and is a relatively qualified solar water heater manufacturer in China. As the first brand in China to introduce electric energy as an auxiliary energy source into solar water heaters, Sunle has been known as the three giants of Shandong solar energy in the industry, together with Huangming and Linuoruite, but in recent years, Sunle has been operating poorly, with an asset-liability ratio of 92%, gradually opening up a gap with other leading brands.
 
The product quality of Sang Le vacuum glass tube solar water heater is acceptable, and there are two series: Hua Hua Fugui and King Kong Guard. The products are equipped with intelligent controllers as standard, but they lack highlights in both technology and design.
 
The minimum capacity of the 131L is priced at 4100 yuan, which is not cost-effective, and the bracket is made of traditional galvanized steel. The bracket of the King Kong Guardian series is made of thickened aluminum alloy, which has higher strength and corrosion resistance than galvanized steel, and the series has four capacities of 170L, 200L, 250L and 300L, and the price is 5600-5700 yuan, which is better than the Huakai Fugui series. These two series are made of polyurethane insulation layer using OMS high-pressure foaming technology of Italian technology, and the insulation effect is in the upper reaches of the industry, slightly inferior to the four seasons Muge and Sun Rain.
 
In order to get rid of the dilemma of continuous losses, Sang Le has established a Sino-Japanese joint venture with the world giant Yazaki General Industry Co., Ltd. in the flat panel solar water heater business to seek better development. Since then, the flat-panel Yangchen Meijing products have been compatible with Chinese and Japanese technologies. The collector is a Japanese-designed super-energy plate consisting of 96 flow channels, which has a higher area utilization rate and a significant increase in the heat-absorbing area than the conventional flat plate collector. The surface is made of 3.2mm low-iron tempered glass, which is 6 times stronger than ordinary FRP and more impact-resistant. In order to minimize heat loss, the product is coated with polyurethane insulation layer on the back of the super energy plate, the super energy board, the surface of the pipeline between the water tanks, and the surface of the water tank liner. For the time being, the product is only available with a capacity of 100L, and the price is about 8,000 yuan.
 
Compared with the traditional glass vacuum tube solar water heater, Sunle's flat panel solar water heater has novel technology, multi-channel design, 25 years ultra-long collector life, and SUS444 heat conduction inner tube is the first in the industry. Consumers who like split design and are optimistic about flat products can focus on Mulberry products. The warranty time is only 3 years, but it promises to repair the product damage caused by natural disasters such as typhoons free of charge, and the after-sales service is timely.