Perhitungan Listrik PraBayar VS PascaBayar

Kita bisa menghitung, dirumah kita lebih efisien/ekonomis pakai sistem pasca bayar atau pra bayar.
Yang perlu dikerjakan 5 langkah :

1. Cari persamaan sistem pasca bayar: 

Ilustrasi: Golongan (Eg. R1), Daya (Eg. 1300 watt)

dari sana kita dapat menentukan/ mengetahui (lihat di perincian kwitansi/ tanya PLN di hotline 123/ Data TDL) ...
Misal Biaya Beban (BB): Eg. Rp. 39.130,-

karena perhitungan pemakaian listrik bersifat progresif, maka perhitungannya sebagai berikut ...
(Harga yang tertera hanya ilustrasi)

Biaya Batas 1 / biaya pemakaian per kwh utk konsumsi antara 0-20 kwh (B1): Eg. Rp. 385,-
Biaya Batas 2 / biaya pemakaian per kwh utk konsumsi antara 20-40 kwh (B2): Eg. Rp. 445,-
Biaya Batas 3 / biaya pemakaian per kwh utk konsumsi diatas 40 kwh (B3): Eg. Rp. 495,-

Selain itu kita juga perlu tahu Pajak Penerangan Jalan (PPJ) di daerah kita (berbeda di setiap kota)

Kalau bayarnya lewat bank/PPOB ada biaya adminnya (ADM)
Eg. BNI: Rp. 1.600,-, 

kemudian dimasukkan ke persamaan: A(kWh), B(Rp.)
asumsi: pemakaian listrik diatas 60 kwh / bulan, PPJ, bayar lewat BNI.

( BB+(B1x20)+(B2x40)+(B3x(A-20-40)) ) x (100%+PPJ) + ADM = B
( 39130+(385x20)+(445x20)+(495x(A-20-40)) ) x (100%+9%) + (1600) = B
( 39130+7700+17800+ 495A -9900-19800) x 109% + 1600 = B
( 495A + 34930) x 109% + 1600 = B
539.55A + 39673.7 = B

2. Cari persamaan sistem pra bayar: 
tarif Listrik Pra Bayar (LPB) dibedakan berdasarkan daya terpasang di rumah kita (Lihat di halaman TDL2010) ...

Kalau belinya lewat bank/PPOB ada biaya adminnya (ADM), setiap kali beli TOKEN.
Eg. BNI: Rp. 1.600,-,

kemudian dimasukkan ke persamaan: A=kWh, B=Rp.
asumsi: misal per kWh = 663

( B - ADM - ((B-ADM)x9%) / 663 = A
( B - 1600 - ((B-1600)x9%) / 663 = A
( B - 1600 - 0.09B + 144) / 663 = A
( 0.91B - 1456) / 663 = A
B = 728.57A + 1600

3. Tentukan A(kWh) & B(Rp.):

gabungkan 2 persamaan di atas

539.55A + 39673.7 = 728.57A + 1600
A = 254.33 kWh

728.57 x ( B - 39673.7 ) = 539.55 x ( B - 1600 )
B = Rp. 186.900,-

Artinya: nilai diatas menunjukkan nilai batas impas antara sistem pasca bayar dan pra bayar.
Di BAWAH nilai tersebut, lebih efisien & ekonomis menggunakan SISTEM PRA BAYAR.
Di ATAS nilai tersebut, lebih efisien & ekonomis menggunakan SISTEM PASCA BAYAR.
(bisa dicoba dengan metode trial & error)

4. Cari rata2 riil pemakaian 1 th

Hitung rata2 pemakaian / pembayaran PLN terakhir selama 1 tahun (semakin besar sample semakin bagus, dengan catatan tidak ada penambahan alat listrik baru dalam periode tersebut dan pemakaian NORMAL).
Eg. Pemakaian saya ketemunya 344.2 kWh / bulan atau Rp. 226.413,- / bulan

5. Ambil kesimpulan

Nilai batasnya : 254.3 kWh / bulan atau Rp. 186.900,- / bulan.
Pemakaian rata2 saya : 344.2 kWh / bulan atau Rp. 226.413,- / bulan.
Artinya pemakaian rata2 saya di ATAS nilai batas.
Demikian, untuk lain golongan, daya & lokasi dapat menggunakan cara di atas, dengan penyesuaian seperlunya.

Pendapat saya kedua sistem tersebut adalah baik, asal sesuai dengan pemakaian kita. Terima kasih.

Selamat menghitung, semoga bermanfaat.

21 komentar:

Tjokie mengatakan...

pak, kalau asumsi listrik pascabayar rata-rata rp.200.000 berapa untuk prabayar nya dengan perhitungan 900watt.

terima kasih.

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