# Benefit Analysis of Grid-Connected Floating Photovoltaic System on the Hydropower Reservoir
## 4 Conclusions  
Through the analysis and evaluation of both economic and financial aspects, it has been found that with the base cases of both:  
Economic evaluation of the plant is the first main finding for the verification consultant and the national agency to select the solution and optimal plan, to compare the general economic criteria of the plant. The national economy points of view with the electricity price of 14.5 UScent/kWh, IRR = 17.2%, NPV = 664.3 billion VND, B/C = 1.55 > 1, payback period is 9.3 years and;  
Figure 5: Sensitivity analysis results.  
\begin{table}
\begin{tabular}{c l c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Targets**} & **1. Investment** & **2. Power** & **3. O\&M Costs** & **4. Investment Capital Increased** \\  & & **Cipital Increased** & **Generation** & **Increased by 10\%** & **by 10\%, Electricity Generation** \\  & & **by 10\%** & **Reduced by 10\%** & **Decreased by 10\%** \\ \hline
1 & IRR \% & 8.43\% & 8.08\% & 10.9\% & 5.70\% \\
2 & NPV\({}_{\text{f}}\) (billions & 82.9 & 56.8 & 205.50 & 79.2 \\
3 & B/C\({}_{\text{f}}\) & 1.073 & 1.055 & 1.20 & 0.931 \\  & Discounted & & & & \\
4 & payback period & 17.5 & 18.0 & 14.7 & \textgreater{}20 \\  & (years) & & & & \\ \hline \hline \end{tabular}
\end{table}
Table 8: Sensitivity analysis results.  
Financial evaluation of the plant based on the factors constituting the electricity price, including revenue sources, reasonable expenses through electricity selling price, risk evaluation from sensitive analysis results is the second main finding for investors to make investment decisions. The investor's opinion with financial discount coefficient (iF = 6.95%); electricity selling price 9.35 UScent/kWh, IRR = 11.14%, NPV = 220.3 billion VND, B/C = 1211 \(>\) 1, payback period is 14.4 years.  
Therefore, the plants are effective, have the ability to recover capital, and can ensure debt repayment obligations for banks as well as capital sponsors. The plant is feasible, considering both economic and financial aspects, especially taking advantage of the available space, helping to protect the environment and regulate the climate, replacing the PV plants installed on agricultural land, forest land, and buildings.  
Conceptualization, T.-T.B.; methodology, N.-H.N.; software, B.-C.L.; validation, N.-H.N. and B.-C.L.; formal analysis, N.-H.N. B.-C.L.; investigation, N.-H.N. and T.-T.B.; resources, N.-H.N. and T.-T.B.; data curation, N.-H.N. and T.-T.B.; writing--original draft preparation, N.-H.N. and B.-C.L.; writing--review and editing, N.-H.N. and T.-T.B.; visualization, N.-H.N. and B.-C.L.; supervision, N.-H.N. and B.-C.L.; project administration, N.-H.N. and T.-T.B.; funding acquisition, [PERSON], [PERSON]-H and T.-T.B. All authors have read and agreed to the published version of the manuscript.  
This work was supported by Da Nhim - Ham Thuan - Da Mi Hydropower Joint Stock Company and Industrial University of Ho Chi Minh City, Ho Chi Minh 700000, Vietnam.  
Not applicable.  
All data generated or analyzed during this study are included in this published article.  
The auhors declare no conflict of interest.