How much tilt should photovoltaic panels have to be to be effective

To optimize performance, tilt your panels at an angle that is 10-15 degrees less than your latitude. For example, if you live at a latitude of 40 degrees, set your panels at about 25-30 degrees. [pdf]

Does Tongwei photovoltaic panel need a battery

In cloud conditions, the panel output can be as low as 80%, meaning you will need a reliable battery system to hold energy stored for those days when the generation via solar isn't enough. [pdf]

Hong Kong ultra energy group

The United Energy Group (UEG) (: ) is a Chinese oil & gas exploration and production company. The company pursues projects in and and is looking into further investment options in South East Asia and the Americas. [pdf]
[FAQS about Hong Kong ultra energy group]