Optimal sizing of Battery Energy Storage System in a PV-Battery system for a Net Zero Home

Abstract

The need to reduce the greenhouse gases related to energy consumption in buildings has led to interest in net zero energy homes (NZEH). NZEH will be able to generate and transfer as much energy as demanded from the grid. To achieve this there has been an increase and adoption of photovoltaic (PV) system for generation within the home system. A battery energy storage system (BESS) will allow for demand dispatch and to overcome the intermittent nature of PV generation. An optimal BESS size will be cost effective, reduce wastage and ensure efficient system operation. An optimal sizing algorithm is implemented and a novel constraint introduced to enforce net zero transfer. The algorithm is assessed on a residential load profile. The results show that the system can achieve the desired objective but with an increase demand on the grid