Our final product is designed to address the critical challenge of harnessing surplus solar energy not consumed by solar panels during the day. It is intended to store this excess energy to meet the nighttime consumption demands of households, representing an innovative solution in the field of renewable energy.
Each EES is made up of eight batteries organized in sets of two units, forming four groups interconnected by cables. This strategic arrangement provides optimized storage capacity, ensuring efficient retention and distribution of accumulated energy. The shape of our product is innovative, we adopt the shape of a sheet hyperboloid. Each hyperboloid "base" accommodates two of the four battery packs, allowing for balanced and effective distribution in space. We provide a 3D image of our product (appendix XVII) to facilitate the understanding of this visual design.
Compared to lithium batteries often found in electric scooters, such as those from Bird and Lime, which have typical capacities between 300 and 500 Wh, equivalent to 0.3 to 0.5 kWh when new, our EES offers considerably greater storage capacity. This guarantees substantial and reliable support for residential nighttime energy demands, increasing energy efficiency and autonomy for end users. We anticipate an energy capacity of approximately 0.25 kWh when reaching approximately 80% of the batteries' useful life. With this, the set of eight batteries would reach a total of 2 kWh, which would double the average nighttime consumption of 1 kWh per family in Portugal, according to data from EDP. This energy capacity would make it possible to fully cover this daily consumption, demonstrating the viability of batteries as an efficient and suitable source for residential energy needs.
The EES will be connected to a hybrid inverter and a BMD. The hybrid inverter distributes energy throughout the house, battery and public grid through usual cables and converts the direct electrical current from the solar panels into alternating electrical current. The hybrid inverter is the best option, allowing energy to be stored in the battery when the household's consumption is satisfied. Since our battery remains in direct current, a BMD is necessary, which controls its charging and discharging.
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