[row header=”Why an Inverter, rather than a Generator?”]

Consumption Table


Description

Suggested FCS Solution

Wattage Approx.

Suggested Batteries to use

1

TV for 13 hours

FCS K3 2400

250Watt

2 x 170 A/H

2

TV & DVD plus 1 light for 12 hours

FCS K3 2400

350Watt

2x 170 A/H

3

TV & DVD & DSTV, plus 6 LED lights for 11 hours

FCS K3 2400

600Watt

2x 170 A/H

4

TV & DVD & DSTV plus 6 LED light + Fridge for 5 hours

FCS K3 2400

700Watt

2x 170 A/H

5

TV & DVD & DSTV , plus 10 LED lights+ Fridge for 4.5 hours

FCS K3 2400

800Watt

2x 170 A/H

6

TV & DVD & DSTV, plus 10 LED lights for 6 hours

Plus occasional Microwave oven

FCS K5 4000

1200Watt

4 x 170 A/H

7

TV & DVD & DSTV, plus 10 LED lights for 6 hours

Plus occasional Microwave oven Electric Gate motor backup power

FCS K5 4000

1200Watt

4 x 170 A/H

8

TV & DVD & DSTV, plus 10 LED lights for 6 hours

Plus occasional Microwave oven Electric Gate motor backup power

FCS K5 4000

2000Watt

4 x 170 A/h depend on time duration

9

TV & DVD & DSTV , plus 10 LED lights for 5 hours Plus 2x computers for the same time

FCS K5 4000

1500Watt

4 x 170 A/H

10

More powerful house hold setup, such as 10 LED lights, TV, & DSTV, Washing machine 2.5 hours

FCS K5 4000

3000Watt

4 x 170 A/H

11

300 W for 12 hours

FCS K3 2400

300Watt

2 x 170 A/H

12

900 Watt for 4 hours

FCS K3 2400

900Watt

2x 170 A/H

13

1500 Watt for 5 hours

FCS K5 4000

1500Watt

4 x 170 A/H

14

2000 Watt for 3.5 hours

FCS K5 4000

2000Watt

4 x 170A/H

 

Inverter vs Generator Table

 

***ALL CALCULATIONS ARE ASSUMPTIONS AND MAY VARY

Petrol Gernerator 5kva Inverter 5 Kva ( FCS K5-4000 )
Brand Honda petrol Gen Full circle solar inverter
Output 4000w 4000w
Energy source  Petrol Battery bank
Capacity 10 litres 680 A/hr (4x 170 ah 12v)
Max output 5000w 8000w
Consumption 2.5 ltr/Hr 166 A/h
At Start 10 ltr 100% 54v 100%
At end 0 Ltr  0 %  46v 10%
Internal losses N/A 1 Kw/h 
Conversion eff N/a 91%
Recharge time N/A 14 Hrs
Load 50% 2000w 2000w
Total in 4 Hrs 8000w 8000w
Run Time @ 50% 4 hrs 3.5 Hrs
Power produced 8 kwh 7 kwh
Cost  R12.89/l petrol x 10 ltr = R128.90 8kva x R1.66/Kwh =R13.28
Cost per Kw/h 8Kwh/R128.90 = R16.11 7 Kwh/13.28 = R1.89
Usage 3 hrs/day/year 3hrsx365days = 1095 hrs 3hrsx365days = 1095 hrs
Life span on Gen/Bat 500hrs to 1500 hrs Average 10 years or 1000 cycles= 3500 Hrs
Cost of Generator/Inv R 9 850.00 R 12 500
Cost of Batteries N/a R3200 x 4 = R12800
Inital outlay R 9 850 R12500+R12800 = R25300
Service interval 150 hrs N/a
Cost to service  R 350.00 N/a
Total kwh produced/Yr 1095 hrs x 2kwh = 2190Kwh 1095 hrs x 2kwh = 2190Kwh
Total Running cost/Yr 2190 Kwh x 16.11 = R35250.90 2190 Kwh x R1.89 = R4139.1
Noise db >100db Silent
3 Year running cost
Generator/Inverter cost Twice  R9850x2 = R19700 R 12 500
Baterry cost N/a R3200x4 = R12800
Replace Batteries N/a After 10 years or 3500hrs full cycle
Replace inverter N/a N/a
Service costs R350 x20 services = R7000 N/a
Total capital cost R19700+7000 = R26700 R 25 300.00
Total cost for 6570 Kwh 6570 Kwhx R16.11 =R105842.70 6570 Kwhx R1.89 = R12417.30
Total R105842.70+R26700 R12417.30 + R25300.00
Cost from eskom N/a R 12 417.30
R132542.7 – eskom N/a
R132542.7 – R12417.30 N/a
R 120 125.40 R 37 717.30