Calculating the KWH Your Solar Panels Produce

This is an overview on how to understand how much energy your solar system will produce. For the whole article and more info visit:

[dominique___]

BRILLIANT video. I took your steps, one by one, and put them into a spreadsheet I created with all my monthly electricity bills for the last 5 years. I just added some formulas to the appropriate cells, and voila.. I know how many panels I need, and how much I'd save. THANKS!!

[Philo]

A great video but (correct me if I'm wrong) when calculating how much you could save on the electricity bill shouldn't you be using the AC Wh rather than the DC Wh (where 20% is lost)?

[ibraheemali]

what would be the cost of batteries if you install solar pannel?

[TrendyHumor]

i need to know how much solar panels i need for 4736 kwh which is monthly
-because i want to know how much for an offgrid house

[aseideman]

Seems like you skipped the part where you calculate how many Watts the solar panel will produce in 5 hours per day. Instead you divided 7500 by 250 giving you 30 panels. But if each panel runs for 5 hours don't you actually need 7500 / (5x250) = 6. Or am i missing something? thanks

[dhood]

No mention of panel orientation on efficiency. Efficiency in summer vs winter, south vs west etc. If I only have a west facing roof for example how can I calculate the power so I know to install it? Title of video is misleading or too simple.

[passedhighschoolphysics]

This doesn't work in California with the new rate plans. Depending on when the panels produce the electricity the power company will give you 4 kw for every 1 kw you give them. None of the solar companies solar calculators factor this in and they are all selling you systems that are much larger than what you need.

[dhasapiriyan]

our company monthly usage is 1000kw...how much watts of solar panel i can fix?

[derekrees]

No, it's kW & kWh not KW & KWh. The 'k' is short for kilo meaning times 1000. The unit is named after James Watt (he who watched steam kettles) so the initial is capitalised. The hour is just' h'.
If you look at the suggested videos on the YouTube page you will note that many people make the similar errors

[connermonier]

I'll make it myself. Just got instructions from inplix website and I'm ready to do it :D

[bharata]

nice calculation but they not say how much solar panel needed.

[theevermind]

"hours of sun"? Really?

The map you show is irradiance, in kWh/m^2, or the average intensity of sunlight. There is no "hours of sun.""

[borysvoronkov]

Go to Avasva page if you want to learn how to build it yourself