Investor Presentaiton
1200.0
ROOFTOP SOLAR PV
30% instead of 10% of rooftop solar PV electricity fed into the grid
PV Rooftop Output (Watt)
Cloudy day 13th December 2018
Typical Load Profile of 2.2 kVA residential with 2 kWp rooftop PV
system (Watt)
1000.0
800.0
600.0
400.0
200.0
0.0
LOAD (WATT)
2500
2000
1500
1000
500
0
69
14:15
00:ST
15:45
16:30
17:15
18:00
18:45
0:60
20:15
21:00
21:45
22:30
23:15
989
0 1 2 3 3.
488
Load Profile with Solar Electricity
Excess Solar Electricity
A market survey on rooftop solar PV installation conducted by GIZ and IESR in 2018 shows that 13% of households (>1.3 kVA) in Jabodetabek
areas are interested to install rooftop solar PV, counting for 368 MW of installed capacity. Around 79% of respondents expect a payback period
of less than 7 years.
Our simulation of a 2.2 kVA grid connected house with a 2 kWp rooftop PV system shows that on average the system will export 30% of
electricity generated into the network, including on cloudy and rainy days when the capacity factor only reaches 13%. The exported electricity
can increase significantly to 42 - 49% on a very sunny day (capacity factor > 17%). The simulation was executed with assumptions that a typical
household load in Indonesia is dominated by cooling appliances (>39% from air conditioner and electric fan) followed by refrigerator (17%) and
entertainment (15%) and the peak load happens at 6 - 7 pm.
The assumption PLN made that only 10% of electricity generated by rooftop solar PV is fed into the grid and therefore the rooftop solar PV
utilization is only for "lifestyle" not for economic reasons is then contestable.
IESR (Institute for Essential Services Reform) | www.iesr.or.id
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