PE Solar Inverter
The Grid sharing solar UPS works without any change-over. The total load is shared by the solar MPPT and the utility during mains availability and between battery and solar power during mains power failure.
Efficiency is the most important factor in a solar system which can be defined as the conversion of the available solar power to useful electrical energy to the load. The inverter efficiency significantly improves overall efficiency but the measure of utilization of the complete power from solar is dominantly the key factor to be emphasized. The inverter efficiency is generally emphasized; however the utilization factor is seldom indicated.
Solar system overall efficiency is combined contribution of three sections namely MPPT converter, inverter and most importantly the utilization factor. The utilization factor however is the most significant parameter and new generation energy experts has realized this and is given due consideration. The utilization factor can be explained as the measure of solar energy utilized to available solar energy.
The output of MPPT is fed to the power sharing module which ensures that the maximum power from solar is utilized for the inverter to function. If the solar panel power availability is adequate to cater to the load demand, no power is drawn from the grid and the solar power shall take care of the battery charging.
The power from mains is conditioned (using AC-DC-AC conversion) in the Grid shared concept and hence some are of the opinion that the efficiency on mains mode is compromised, but this ambiguity is unfounded as the very purpose of using solar concept is to minimize the mains power dependency, with efficient planning only a fraction of the mains power is utilized.The UPS output gives conditioned power without any change-over and hence is ideal for critical applications like servers, diagnostic equipment and process machineries.
The intelligent module utilises the entire power available from solar and in the event of a short-fall in power availability from solar, the mains power is drawn to compensate the deficit of power.
For example: If the total load is 10KW and we use a 10KW Grid sharing Solar UPS with 10KW Solar panel ,under normal conditions the entire 10KW power is supplied by the Solar energy and no power is drawn from mains. But if the solar power falls down to 9KW due to reduced sunlight intensity, then the deficit 1KW power is drawn from the mains/ Battery bank and rest 9KW from solar.
Power sharing in GSS UPS for catering to the load can be configured as per requirement, with primary source as Solar power, secondary source as Grid, Battery as third source or with primary source as Solar, secondary source as battery bank, Grid power as third source. It can also be configured to work only on Solar and Grid without battery bank with Solar as the primary source.
• DSP based technology, Intelligent MPPT tracking
• Rugged, high reliability - long life design using IGBT
• High converter efficiency (>96%)
• Computer interface via RS-232/RJ45 allow to monitor and store solar data application.
• 35% extra battery life using temperature compensated float-cum-boost battery charger.
Compliance certified as per IEC 62509:2010 by NABL certified lab.
Convert existing Online UPS Offline UPS/Inverter to a Solar based system
Intelligent transfer switch automatically transfer the load between solar and grid and ensures maximum utilization of solar power.
Depending on need the solar wattage can be upgraded in phases, initially the solar module can be selected only to charge the batteries to provide backup during power failure, gradually the capacity of panels can be upgraded to cater the entire load.
Deep discharge protection by adjusting the DOD level setting
Day time battery discharge protections for night operated load
User friendly LCD display energy meter to read solar power, energy in units (kWh), various status and parameters of the charge controller - Facilitates the efficiency evaluation of the solar installation.
PE windmill inverter with MPPT is one of the No. 1 windmill inverters manufactured in India indigenously. Depending on the power curve provided by the turbine manufacturer, the MPPT is customized for best efficiency.
The Grid sharing windmill UPS uses the grid and the windmill in parallel;windmill as the primary source and grid as the secondary source.
The intelligent module utilizes the entire power available from windmill and the remaining power from the mains if there is a shortfall. The windmill supplies the power to the load and also charges the batteries during normal load demand conditions; however, during the peak demand of the load is higher the difference of power from mains grid.
Grid sharing windmill inverter ensures 100% utilization of available power
PE Grid sharing Solar UPS concept-Download
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Write up - The Grid sharing solar UPS works-Download