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Always read all of the pages and subjects before starting a solar system installation - If you are unqualified or in any doubt about your own ability then consult a qualified solar system installer.

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Picture of sun and solar panel as a solar logoLive Experiment

Solar Power - Free energy from natural resources

Solar panel power output experiment - Once you have had a go at all the working out, there is nothing like doing a live experiment to see if all the sums add up correctly. So here are the results of the experiment I did to see how one of my 27 w solar panels was actually performing. You can of course do the same experiment yourself, and it can be good practice to set up your solar system components on a temporary jig basis first. This makes sure you are getting what you expect from your solar system components before the final installation. You will have to allow of course for a bit of resistance due to the wiring runs you will have on the final installation.

The basic solar set up for the experiment:

Solar panel 27 watts for use in the live solar experiment + Solar regulator used for mananging your solar power system + Leisure battery the bank where you deposit your solar energy + 12v electrical light fitting =

First of all I let the battery charge up until the green led was showing on the regulator indicating a fully charged battery, I then covered up the 27 w solar panel and switched the 12 volt (0.57 Amp) strip light on for two hours. I then turned the strip light off and uncovered the solar panel and watched the regulator to see when the green led came back on. It took exactly 1.25 hours. The working out goes like this:-

First January Solar Experiment

First of all the weather was a mid January day in southern England with an outside temperature of 9° centigrade. The time of day was 12:00 GMT London, cloud cover was approximately 55% so these conditions all add up to an ideal average sort of day for this solar panel power output experiment.

Solar Panel
= 27w

= 4 Amp basic model

= 12 v 110 Amph

Strip Light 12 volt
= 0.57 Amph (power consumption per hour)

Strip Light

= 0.57 Amp

Strip light consumed 1.14 amps for the two hours it was illuminated

Solar Panel
= 27w

Solar panel takes 1.25 hours to recharge battery
= Solar panel is producing very approximately 1 amp per hour

Second March Solar Experiment

The same experiment was performed with the same conditions prevailing as the first although a little later than originally wanted in the month due to 4/5 days of bad storms in the UK. We needed the conditions to be similar to the first experiment to make a good comparison.

Strip Light

= 0.57 Amp

Strip light consumed 1.14 amps for the two hours it was illuminated

Solar Panel
= 27w

Solar panel takes 0.45 of an hour to recharge battery
= Solar panel is producing very approximately 2.25 amps per hour

So there the experiment ends for the time being, but what we have found out is that approximately for every watt of solar panel energy produced you get 0.04 Amph approximately in the weather conditions stated above during January, and 0.08 Amph in March.

To find your expected daily harvest you need to multiply your expected local daily sunshine hours by the hourly outputs above for every watt of solar panel power.

Typically this may be 2-3 hours in January (UK) and 3-4 hours in March (UK) and 4-5 hours in mid summer (UK) depending on your own installation latitude.

It is the figures in the tables above that will be the most help in working out your panel requirements when compared with your daily 'energy required' figure. Remember they are approximate and that all installation sites vary and your latitude will also be a factor in assessing installation performance.

This experiment will be repeated again in June with increasing longer day light hours to see the results then, they will be reported on this page. So please come back again and check the results.

Other pages to help you with the installation are:-

free energy  button How to wire up a basic solar panel system
Is your battery bank correctly wired up?
free energy  button All About Inverters in a solar system
free energy  button The Big Live Solar Panel Experiment
See how our 27w solar panel performs under live conditions
free energy  button Battery care
free energy  button Looking after a leisure battery
free energy  button Solar circuits and solar power circuitry
free energy  button Choosing and using your wire in your solar system
Always read this page before starting a solar installation project - there is critical detailed information displayed.

To communicate with us over technical issues please use the Solar Chat Forum, also take a look at the Solar Q&A page.

Global Warming - it's why we are making changes to our way of life!

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