A Techno-Economic Analysis of a PV-Battery System in Greece

Abstract

A techno-economic assessment has been carried out to evaluate the economic feasibility of energy self-consumption from a combination of photovoltaics and lead-acid batteries (PV-BAT). The Total annual economic cost (TAEC) and the cost per unit of energy were first calculated, from PV-BAT data collected over a 12 month period and then from energy system model data for the same period. A comparison of the actual renewable energy yield to optimal model output revealed that energy was restrained partially due to limited storage resources. The cost per kilowatt-hour for the two examined scenarios ranged from 0.55 to 0.62 €/kWh and from 0.42 to 0.46 €/kWh, respectively, showing room for further cost reductions. Despite currently lower energy purchasing costs from electricity providers, these findings constitute a significant price indication of the kilowatt-hour produced by PV-BAT, showing the need for further investigation into battery sizing can be optimized and battery cost can be reduced.

Reliability Evaluation of PV Systems with Integrated Battery Energy Storage Systems: DC-Coupled and AC-Coupled Configurations

“…In this study, a lifetime model estimating the power cycling capability of IGBTs with junction temperature limitations of 150°C is used [20]. The number of cycles to failure is then defined as shown in Equation (7). The input to the model is the matrix of n i for T jm and ∆T j and t on values.…”

“…In [6], the residential PV-battery systems were studied from a control point of view. A techno-economic analysis of a PV-battery system is investigated for the installation site in Greece [7] with DC-coupled configuration. Similarly, the benefits of connecting battery to a PV system in a DC-coupled configuration are investigated in [8], while AC-coupled configuration is investigated in [9].…”

Renewable Energy Sources Penetration in Greece: Characteristics and Seasonal Variation of the Electricity Demand Share Covering

“…Considering the volatility and stochastic nature of renewable technologies operation, the efficient management of power systems, in terms of planning and operation, has been the subject of several publications [7][8][9][10][11][12]. In addition to this, the idea of energy storage has been developed [13], especially for non-interconnected islands [14].…”

Accurate Sizing of Residential Stand-Alone Photovoltaic Systems Considering System Reliability

“…Several studies conclude that SAPV systems are an economic and profitable solution for residential customers without access to the DN [33]. These studies show that the initial investments in PV panels, batteries, and installation costs have an amortization period smaller than the PV plant useful life [20,34]. Therefore, for many residential customers the reliability of the electrical supply is the key factor when planning the installation of a SAPV system, rather than the investment costs.…”