Question Best Posts in Thread: How much power from a solar panel in Dumaguete

My inquiries have discovered that they do buy it from the customer, but only at half price. Thus the most efficient way to use solar is not to sell it to Noreco but only produce slightly less than you use during the daylight hours and draw whatever extra you need during the day and night from the grid. It seems to me that you will still have a Noreco bill, but what you save on that bill 'should be' (my own guestimate) enough to pay off your solar investment in 6 to 8 years.

 

Short answer; No one can tell as there are more factors. E.g. how is you consumption pattern? E.g. are you using a lot of electricity during daytime or night time?
First. Don't confuse kW with kWh. kW is the amount of power something can put out. kWh is for how long it can put out that amount of power. If a panel produce 100W for 1 hour it has produced 0.1kWh.
A 500W panel can not put out 500W of electricity. There is a loss in converting it from DC to AC.
What kind of inverters do you intend to use?
We installed 120 x 250w panels with 300w micro inverters and grid tied the system. We cut our bill in half, and we used to consume 5000-10000kWh
Our total output of 119 panels is 2500-3000kWh per month, depending on weather. How much you save depends on you consumption pattern. A kWh saved during the day will nock 10p of your bill while one overproduced and sold back to the grid will only give you 5p per kWh.
I.e. NORECO will only pay you 5p per kWh you deliver to them. But, as you pay them 10p per kWh they deliver to you the saving for not having to pay that is 10p.
So, in short, to produce 2000kWh per month you need about 80 panels, if you use the same technology, i.e. micro inverters, which is the most effective for grid tied systems.

 

500W = 0.5kW
2 x 500W Panels = 1kW
2000kW / .5kW Panel = a b l o o d y lot - in simple maths terms

BUT with solar it is not that simple.

My 1.75kW system i was looking at had 7 off .25kW panels, with monthly usage of 500kW

So based on .5kW panels you would look at approx 35 to 40 panels.

But I would go one step further and look at on-grid metering as well. (my 2cents worth).

Try Ken Scales from Solar Power here in Duma ---- I'll PM you his numbers.