This online tool aims to promote self-sufficiency in buildings with flexible loads, by properly sizing the
photovoltaic and battery storage systems to be installed in a building, and providing an efficient schedule for
the flexible loads. The tool has been developed in the framework of “Cost-effective rehabilitation of public
buildings into smart and resilient nano-grids using storage – BERLIN” project. The objective of BERLIN is to
implement cross-border pilot measures to support innovative and cost-effective energy rehabilitations in
public buildings based on the nano-grid concept, the building block for smart micro-grids. The project focuses
on increasing grid penetration, combined with energy storage and demand-side management, along with
enhancement of energy efficiency in buildings. The goal is to increase the level of self-resilience in public
buildings and to make them greener, smarter, and sustainable.
The tool calculates the proper size of a hybrid PV+storage system to achieve one of the following objectives:
- Maximum self-sufficiency
- Maximum net present value (NPV)
- Cost-effective solutions for enhanced self-sufficiency
The tool also incorporates an option for an exhaustive analysis, that delivers the results for all possible PV and battery system size combinations, as well as a fast analysis for 9 PV and battery size combinations to quickly evaluate the economic performance and energy efficiency of such solutions in the examined building. The required inputs are: electrical consumption, building location, PV and battery size range for the analysis, electricity costs, and the policy applying to renewables in the region of the case study. A financial analysis is undertaken for a period of 5-25 years (based on user’s choice), taking into consideration several technical and financial parameters. The tool can be used by both professionals and non-professionals users. - Feel free to use the tool for your analyses.