SOLAR ENERGY SYSTEM CALCULATIONS

 1.  SOLAR PANEL TYPE

     BC 670W Half-cut Monocrystalline PV Modules Aiko Solar brand (Tier 1 Solar PV Panel, China)  

 

2.  SOLAR SYSTEM CAPACITY

     Power per pc:  670W  

No. of panels:  12

     System capacity = 12 x 670 /1000 = 8.04 kWp

 

3.  ESTIMATED MONTHLY ELECTRICITY GENERATION FROM SOLAR

     Assume: Sun hours per day/year:  3.30 hrs.

     Monthly electricity generated = 8.04 x 3.30 x 30 days = 796 kWh

 

4.  POTENTIAL SAVINGS ON ELECTRICITY COST PER MONTH

     Assumption:     30% solar generation for self-consumption during daytime and 70% export to TNB Grid

     Rate for savings in daytime: RM 0.4443/kWh

     Rate from export (energy charge): RM 0.2703/kWh

     Solar usage consumed in daytime = 30% x 796 = 239 kWh

 Balance solar export to TNB = 70% x 796 = 557 kWh

Saving in daytime   = RM 0.4443 x 239  = RM 106

Saving from export = RM 0.2703 x 557  = RM 150

SST (daytime saving) = 8% x RM 106    = RM 8

KWTBB (daytime) = 1.60% x RM 106     = RM 2

                                                                     -----------

Total saving per month                              RM 266

 

5. RETURN OF INVESTMENT (ROI)                   

Solar system investment:    RM 19,000

Simple payback period = 19000 / 266 / 12 months = 5.95 years