Results in Engineering· 2026Q1
Investigation of electric grid unavailability and back-feeding on the economic viability of a grid-connected rooftop solar photovoltaic system integrated with battery energy storage
- 2citations
- Q1SCImago
- 2026year
Short summary
A grid-connected rooftop solar PV system with battery storage is most economically viable when grid unavailability is low (0.8%) and the system can back-feed energy, achieving a 5.5-year payback and $0.118/kWh LCOE.
AI-generated from the title and abstract; the full text is not read.
Key points
- Grid unavailability significantly affects the economic performance of solar PV systems.
- Systems with 0.8% grid unavailability and back-feeding capability achieved the best economic results.
- Optimal system performance included 143,129 MWh lifetime energy generation and a 0.773 performance ratio.
- The best-case scenario resulted in a 5.5-year payback period and an LCOE of $0.118/kWh.
- A total of 46,155 tons of CO2 emissions were saved over the 25-year project lifetime.
AI-generated from the title and abstract; the full text is not read.
Abstract
ABSTRACT The generation of energy with renewable energy resources is necessary to achieve the sustainable development goal of clean and affordable energy. This study investigates the effect of an unreliable electric grid on solar photovoltaic energy integration. Also, it assesses the effect of back-feeding energy to the electric grid on the economic viability of the system. The case study location is Eagle Square in the Federal Capital Territory Abuja of Nigeria. A detailed analysis of technical, economic and environmental aspects of the solar photovoltaic system is discussed. The study considered electric grid islanding of the mini grid system due to power outage on the main electric grid with unavailability ranging from 0.8% to 67% annually. PVSyst was used to integrate the building 3D model with solar photovoltaic panels and run the energy simulation. The best performing system had the ability to back-feed energy to the grid with a 0.8% grid unavailability, the lifetime energy generation was 143,129 MWh at a performance ratio of 0.773. The project had a payback period of 5.5 years with an LCOE of 0.118 $/kWh, it had a total carbon dioxide emission saving of 46,155 tons for the 25 years project lifetime.
The authors' abstract, as published at the source. Results in Engineering, 2026 · DOI ↗
Continue with a free account
Ask the paper: 3 free questions a day about this paper; save it, get its citation, new summaries every day for your field. Takeaways are Premium.
Continue free on the webSign in with Google or Apple; no card needed. You come back to this paper.
On your phone:
Field: Electrical and Electronic Engineering
Electrical and Electronic EngineeringEngineering