How to estimate the size of your solar electric system

Learn how to estimate the size of your solar electric system, including the number of solar panels that are needed, as well as the inverter size for AC power.

⏱️Timestamps:
0:06 Intro
1:18 Review of electrical load assessment
1:52 Amount of energy to be offset by solar
2:33 De-rate factor to account of inefficiencies
3:19 Review of Peak Sun Hour assessment
5:20 Number of solar panels needed
6:00 Inverter sizing
6:54 Temperature effects
8:33 Maximum voltage
10:45 Minimum voltage
13:02 Voltage range
14:17 Other videos and resources

📝Resources:

🗎 Working on Solar Design and System Sizing (FS-2023-0655)

[akhan]

@13:22 instead of multiplication sign, the division sign should be used to remove any confusion. Excellent work

[baburedi]

Thanks a lot, Your explanations and Data support was extremely well, and gave me a clear insight in panel + String designing. Thanks once again

[valramsingh]

Thank you Prof.... very very educative video...well presented ..God Bless

[abrallianadam]

sir please help me, 3:55 The data I have in the section shows ANN -999.0. how can i get the correct value? Thank You. my coordinate -6.924497, 108.461269 sir please help.

[matthewolanrewaju]

Is 5565kwh the annual energy demand or daily? I guess the design should be based on dsily demand

[twitdogg]

in your previous calculation to determine the number of panels you got 12 panels based on the consumption and the peak sun hrs, now u get 7 to 9 modules when u calculate to determine the size of the inverter ... i don't understand. do we use 12 panels or 7 to 9 panels?

[AbdiIsmail-wv]

When using the annual billing statement don't we have to use the month/s of the highest usage(June 617kWh and Aug 621kWh) to estimate the size of the solar system?

[nikolairodriguez]

Very useful video. However I have a question.

As you very well know, the patterns of energy consumption throughout the day does not match the energy generation.

Hence, the solar panels are producing most energy during the time of the day where people are at work, and stop generating when people are home again.

That is why I do not see the logic between sizing a non-grid and a on-grid installation the same size. The on-grid may have to be a larger installation in order to break-even with the extra net-energy sold to the grid during the day, to compensate for the energy consumption at night. This is especially true during the winter times.

Would you be able to address this issue?

[mathematician]

need the whole formuala in pdf form pleas

[JohnWick-djlt]

I need help to understand with this my instructor at Erwin technical college in Tampa Fl Siggi Brocks he's German and he sucks. Please help really want to understand.