Help With Calculation

silkman said:
sorry 80kwh per day
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This is insanely high, this is so high in fact that you would have specific things pushing it this high for example a substantial crypto mining operation, massive old fridges, 3 or so geysers, old aircons as someone pointed out a workshop of sorts. Pool pump sauna, multiple halogen lights. Someone baking rusks 247

Someone mentioned starting with the small things. You need to figure out what your culprits are this is almost 4x my daily use.
 
Insurance for my R150k system with panels and Li batteries and 8kW inverter was R7 per month added value to my house's value... So it's a non issue in the calculation
(As is maintenance and servicing - mentioned by another reply earlier)
 
80kWh per day is high.

I have two households on my property and we average between 40kWh and 50kWh per day.

The 76kWh day this month was when I was running the new 18m² underfloor heating for most of the day to test it out.

Only other time I did more was nearly 100kWh for the day on the middle of summer running all 3 my aircons for most of the day.

Only heating or cooling would cause that high usage. Or crypto mining. Screenshot_20220423-224239_SOLARMAN%20Smart.jpgScreenshot_20220423-224322_SOLARMAN%20Smart.jpg
 
In today's money (real) one is looking at R313564 once off payment vs R429347 for the rental option.
So rental is about 37% more expensive. Inflation rate of 6% p.a. assumed.
 
So i'm also looking at the rental option - but with the ability to pay "into" the fund when i have excess funds. Its basically a bank asset finance much like anything else.

However, I thought I was high at a peak of 38kWh! And thats a relatively big house with 6 AC's (granted they're inverters and not all on at the same time), electric stove/oven, 3 geysers, pool pump etc etc.

Something is drawing a major draw in your house. Is there perhaps an underfloor heating system you don't know about on a thermostat?

I ask because when we bought our house we were in it for about 3 weeks and I kept thinking "i'm losing my mind" because parts of house felt like the floor was warm. Only after investigation did we discover the under carpet heating was actually on 24x7 but using some kind of hidden thermostat. The old owners must have been paying something stupid because in the 3 weeks we had it on I wept when Eskom had calculated our portion of the split bill from the sale...
 
silkman said:
sorry 80kwh per day
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Ma se tannie se oom se ouma.

For the two us I'm trying to keep it below 15 units per day in this highly inefficient rental house. My previous more more efficient house I used about 8 units per day on average.

But then again I haven't done my Carpentry and 3D printing hobbies in a while.

You probably have a very good reason for such an enormous demand, running a BnB or whatnot, but I would first start making some major adjustments otherwise, in my opinion, it is not sustainable in the long term.
 
maumau said:
Yeah, but you're one of the lucky guys who have solar.
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Solar. No solar. 4KWh is 4KWh. Im still busy installing. My panels is lying on the grass at present te generate power. Will go shopping to steel tomorrow to put them on the roof.
 
Magnum said:
Solar. No solar. 4KWh is 4KWh. Im still busy installing. My panels is lying on the grass at present te generate power. Will go shopping to steel tomorrow to put them on the roof.
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Apologies, thought it was already installed. 4KWh is very little.
 
ok so after all the comments it seems I made a booboo on my 80kwh. The COJ statement I was looking at was billed for 2 months as COJ messed up their billing. Average is 55KWh with2 properties and 3 geysers and pool pump.
Can someone do the advise on the initial calculation request please?
 
silkman said:
I have 2 options to install solar power at home.
The outright purchase price is R313 564
The rental option monthly over 7 years is R4 545.77 with a 10% deposit (R31 356) and a 6.5% escalation and a 10% buyback option after the rental period is over.
If I were to invest the full R313 564 at a 10% return over 7 years what would I the system actually cost me at end of 7 years using the monthly return to subsidise the rental.

Thanks in advance
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It does not make any sense to take the rental if you have the money up front, the interest rate on the rental is higher than 10% and it escalates plus a buy back. Its simple maths, what is your % growth on the investment vs the rental finance interest rate.
 
silkman said:
ok so after all the comments it seems I made a booboo on my 80kwh. The COJ statement I was looking at was billed for 2 months as COJ messed up their billing. Average is 55KWh with2 properties and 3 geysers and pool pump.
Can someone do the advise on the initial calculation request please?
Click to expand...
See #27
 
Steamy Tom said:
It does not make any sense to take the rental if you have the money up front, the interest rate on the rental is higher than 10% and it escalates plus a buy back. Its simple maths, what is your % growth on the investment vs the rental finance interest rate.
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the investment return is 10%, the rental increases by 6% a year
 
silkman said:
There is no interest except the 6% increase
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lol you don't get finance without interest, a rental option is just another form of finance, the deal is being financed. Take the base monthly installment and multiply it by the term (don't even begin yet to factor in the increase per annum) and you will see that the amount payable far exceeds the outright purchase price, that sir is called interest.
 
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