Comparative Analysis of Reliable, Feasible, and Low-Cost Photovoltaic Microgrid for a Residential Load in Rwanda

Table 3

The sizing of PV, battery, and converter to supply power to AC load. This case can well fit in regions far from the national utility.

Load demand: 5467 Wh	Battery needed Li-ion (ASM) 12 V/100 Ah with DoD 100%	Solar panels needed for off-grid systems with 5.5k Wh/m^2 yearly radiation
Load by considering two days of autonomy: 10934 Wh	1200 Wh need to charge this load for one day with or 10 strings which makes battery size of	We consider solar irradiance of 1000 W/m^2 with 5.5 hours of solar availability
The site where data was collected manifests clearness index of 0.55 (Figure 3) which is a good indicator for clear and sunny region, so two days of autonomy is a good approximation to minimize the battery cost in this design	The 10 strings of batteries will be connected in parallel to make a battery bank be able to accumulate maximum solar charges. It is noted that the battery is the only component that is mostly expensive, and they need a replacement before the lifetime of solar photovoltaics	Solar panel capacity: . Using this CS6K-295MS solar, we get minimum of or simply 8 solar panels to meet the daily load demand