best design hybrid system with battery bank 3KW 4KW 5KW

Before selecting or purchasing any equipment required for a hybrid or stand-alone power system the installer should have a good understanding of the basics of sizing an energy storage system - The most important part of the process is establishing the load profile or building a load table to estimate the amount of energy required to be generated and stored per day. If you cannot develop a load table then a professional solar installer or system designer should be consulted. The general steps are as follows:

Estimate the loads - how much energy is required per day in kWh. For off-grid power systems, a load table should be developed for both summer and winter requirements. The maximum demand or peak demand also needs to be considered when selecting the battery and inverter/charger.

Determine the battery size required in Ah or Wh. You need to take into account the battery type and chemistry, maximum depth of discharge (DoD), round-trip (charging) efficiency and maximum charge rate.

Determine how many solar panel/s are required to charge the battery and supply the loads taking into account the local conditions such as - average irradiance throughout the year, shading issues, panel orientation, and temperature derating factors.

After steps 1 to 3 have been established you can now select the appropriate Inverter/charger, solar inverter/s or Solar Charge Controller/s to suit the system.

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The company has been awarded Xi 'an High-tech Enterprise, Shaanxi Private Science and Technology Enterprise, Xi 'an Private Science and Technology Enterprise and other awards, and passed the ISO9001:2008 quality management system certification, ISO14001:2004  environmental management system certification, OHSAS18001:2007 occupation health and safety management system certification, and has the self-import and export rights, part of the export products through the European Union CE and German TUV certification.