Solar output calculator

Bluedog225

Good morning,

I’m looking for advanced solar calculator

I’ve been doing a lot of research into solar for an off-grid system at mycmy workshop.

If the total system cost works out, I’m planning on covering the flat roof with panels.  54 panels (9 strings of 6) with 330 watts nominal output. The roof slopes west (ish) at about 6 degrees.

I’m looking or a calculator or estimator for panel output throughout the day.  An hourly basis would work.

Overall, during the summer months, I’ll have a 90+% chance of a little over 5 hours of max output at my location so getting my total production calculated is straightforward.

But I’d like to know how long the array will produce enough to offset the air conditioner draw.  The goal being to understand the necessary battery storage to run the AC all night.

For example, how long will a 17,000 watt (nominal) array produce at least 2000 watts as the sun rises and sets?

Does anyone know of a way to make this estimate?  I’ve been looking around but haven’t found it yet.

Ideally, a formula or calculator that takes into account longitude, latitude, and panel orientation that outputs percent of rated wattage actually produced by each hour on a given date.

Thanks

Tom

 

Vic

Hi Tom,

Try this:
https://pvwatts.nrel.gov/version_6.php

And  your PV  string configuration will often depend upon the  requirements dictated by the inverter (or charger)  to which the strings connect

FWIW,  Vic

Bluedog225

That is just what I needed. Thanks Vic!