Chinese Tier 1 brand Solar Panel (Longi, Jinko, Trina, Canadian, Ja etc.)
This type of product is mainly Tier 1 solar module product in China, include Longi solar panel. Jinko solar panel, Canadian Solar panel, ja solar panel etc.all of which are among the top 10 world-renowned brands. The original A grade product is mainly mono crystalline and half cut cell solar modules, with a power range of 400watts to a maximum of 700watts.quality warranty is 25 years.
A grade, this type of film is characterized by a neat and uniform appearance, printed electrode grid lines, no broken grid, no surface stains, no leakage, no aluminum package, no hidden cracks, no scratches, no black core, no reverse current, stable electrical performance, and high conversion efficiency
Chinese tier 1 brand solar panel
Tier 1 Solar Panel,Mono Solar Panel N Type,Solar Panels Bifacial 555 Watt,Solar Panel Mono Topcon Cell PLIER(Suzhou) Photovoltaic Technology Co., Ltd. , https://www.pliersolarpanel.com
Roku recently partnered with TV manufacturers such as TCL and Vizio to launch a smart TV that integrates directly with the Roku system. Although the TCL model will not be launched in the Chinese market, we are still very interested in the combination of “Chinese brand + foreign system†and take a look at the simple experience of this TCL Roku TV.
Design and Intelligent Systems
TCL Roku TV has four models of 32, 40, 48 and 55 inches, of which the 32-inch resolution is only 1366768 pixels, other models are 1080P. The model for this trial is the 48-inch model, priced at about 500 US dollars (about 3072 yuan), or very cheap. 
In terms of body design, there is nothing special about it. Due to cost constraints, we found that the screen is not purely flat, and the borders are slightly wider than the high-end models. The TV is also equipped with a Roku-style remote control. Instead of designing digital buttons, Netflix and other streaming media services are placed in a clear position, allowing one-touch access. In addition, the five-dimensional navigation keys and other functional buttons appear to be It is also quite easy to use.
Roku TV's interface and menus are very simple and easy to understand. Basically, the graphical icons of the squares also show various items. There is no cost to start with. To use Roku, you first need to connect to WIFI and then sign up for an account or sign in directly. You can also install apps on your phone and tablet to connect to the Internet. 
One of the features of the Roku system is the input selection. Most TVs will let you choose among "HDMI 1HDMI 2", and Roku allows you to customize the name, such as "limited TV", "PS game", etc., to make it easier to use. When everything is ready, you can use a variety of applications, games, etc., very convenient. In addition, you can also create multiple custom home screens to achieve a personalized application arrangement and set to boot by default.
In general, although smart TV system applications are similar, but the interface design and some operational details can still make users feel a little different, Roku does a good job in this area, has a smooth responsiveness, rich Application resources and an easy-to-use interface experience can also support shared play functions for iOS and Android devices.
Function and picture quality
In addition to 32-inch models with 1366768 resolution, 60Hz standard, other sizes of TCL Roku TV have adopted 1080P/120Hz, and they also have built-in Roku 2 and 3 box functions. In terms of local playback, USB interface and DLAN transmission are supported without any problems in use. 
Compared to smart systems, the quality of the TV itself is somewhat mediocre. The main drawbacks are poor black levels, inaccurate colors, and screen consistency. We only tested the 48-inch model, its black level and contrast are inferior to the Samsung F5000 and other models; and in terms of color accuracy, the skin color display is red, cyan is completely blue, and the accuracy is not good. In terms of screen uniformity, the lower right corner of the screen is too bright and there is also a light leakage across the bottom edge. In addition, the sporting effect is not too good, in the test only 300 standard, but the input delay is also good, only 28.9 milliseconds.
to sum up 
In general, TCL Roku TV is a smart integrated, low-cost, budget-grade smart TV. The biggest selling point lies in the versatility of the Roku system, which is almost unsatisfactory in terms of picture quality. Of course, for users in the U.S. market, it is still a cheap, easy-to-use option, and domestic users have no trouble accepting it.
Using solar cell testing equipment to measure and screen, the conversion efficiency, filling factor, and appearance that meet certain standards are first level. Generally, the conversion efficiency, filling factor, and appearance of first level are better than those of level B
The level of solar panels can be divided into first level, second level, third level, and fourth level, and the first level components can be divided into first level+and first level - two levels. The second level is also the same, and the cost difference between different levels of solar panels is also very large.
TIER 1 brand include
Longi, Jinko, Trina, JA, Canadian, znshine, etc.
quality warranty
25 years
grade
original A grade (each solar panel can be checked on official website with barcode)
power range
400watt to max 700watt
The original TCL Roku smart TV is like this
The development of smart TVs abroad is far more complicated than in China. Basically, in addition to systems developed by Samsung, Sony, and others, domestic models use the Android customization system, while foreign countries rely on Amazon, Apple, Roku, and other TV boxes, through their own ecosystem and content consumption models. Attract users. Interestingly, these TV box makers are gradually integrating the smart system directly into the TV like the Chinese TV brand, allowing users to get a more vertical experience. Roku took the lead in this step.