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Solar Panels Pros and Cons

Updated on September 20, 2018

monthly average kilowatt usage

Before you buy....

Having built a operational solar panel system for alternative energy from the ground up and having first hand experience, I feel there are some things that are worthy of consideration before you lay your hard earned cash down for a solar powered system to save energy. My system is not at full capacity as of yet, but I have learned a few things along the way that might be beneficial to those contemplating going solar power. It is my intention to reduce and/or eliminate my light bill.The more I save, the less that I have to mail off to the light Company every month. I endeavor to break that addiction. First, there are four main components that make up a solar powered system. They are the solar panels, controller, batteries, and the inverter. The graph to the right indicate my actual kilowatt usage. In July of 2009 is when I started my solar project.

1.Solar panels- Solar panels are made up of Photovoltaic cells arranged in series to make up a total of 18 volts. To properly charge a 12- volt battery, the voltage must be at least 18 volts. These cells produce approximately.5 volts each. These cells are then soldered in series (negative to positive), for a total 36 cells. 36 x .5 = 18 volts. Each additional solar panel added would be wired in parallel (positive to positive and negative to negative). This would add power while keeping the volts the same. Solar Panels only generate electricity, it does not store it. Batteries will be needed for storage.

a. To buy or build solar panels...

Pros--The main benefit for building your own solar panel are substantial $$$$ savings. I have a 4' x 8' solar panel on my system. a comparable solar panel on the Internet sells from $1100.00-$1300.00. I built mine for a total of 315.00. You can see the huge financial benefit savings. You can find ads on the Internet for building your own panels for $100.00 or less. When they listed the items needed, they always had items that were "on hand" with no cost. I quickly found out that I don't have these items laying around the house. My costs escalated to 315.00. Specific plans for making the panels can be purchased for $20.00 and up. By keeping my costs down, I discovered that my break even time was shortened to months instead of years.

Cons--Soldering these cells together is very tedious work and time consuming. I believe it is because of the labor involved in the making of the panels are why they are so expensive on the market. In my 4'x8' panel, I have 144 cells. Each cell has eight soldering points. Two on the top, and six on the bottom. They do offer pre-tabbed cells at a increased price which means less soldering. They are very fragile and can be broken easily. I believe I only broke two when building my panel.In an effort to keep my start up costs to a minimum I elected to make my own. I have done very little soldering in the past, but I progressed fairly quickly. In my own personal opinion, I believe the average person could do it with a little practice.

2.Controller--The controller has a dual purpose. It regulates the charge to the batteries and displays the voltage and amperage coming from the solar panels. I have a 30 Amp controller on my system. It costs about 70.00. When it senses that the batteries are fully charged, it will cut back the charge to the batteries to prevent overcharging. The controller also displays the battery condition such as under/over charged. I know that when my capacity exceeds 30 Amp, I will have to replace it with a larger one.

3. Batteries--Batteries stores the power that the solar panels generate. It is recommended that a marine or deep cycle battery be used in a solar power system. You could expect to pay somewhere around $85.00 for each battery.The number of batteries needed with be dependant upon the power generated by the solar panel and electricity usage.

4. Inverter--The inverter converts the 12v battery voltage to 120v AC. The size of the inverter will depend on your power use requirement. In my case, I have a 3,000 watt inverter with a peak load of 6,000 watts. This has a price range of $300.00-$400.00. It will handle small appliances, ceiling fans, lights and refrigerator. In the future I will have to upgrade, but I am not there yet.

Should you decide to build your own solar panel, The solar cells can be purchased on EBay. There is a class B cell that is sold. It has small chips in the edges of the cells. It is cheaper than the class A cells with no chips for further savings. I have Class A&B in my solar power system. The voltage output of the class B cell was not affected by the chip. It is more cosmetic than anything. For those of you that want to further reduce the cost, it may be a consideration.

I embarked on my project not knowing for sure if I could do it or not. After the experience of building my first panel, I now have full confidence in my solar power system and am very pleased on the way it is working for me. The system does work. I do see a reduction of my light bill. This is real money saved with a return of my investment of time and money. I would like to offer a couple of tips I have learned.

When the output exceeds the input from the solar panel, you began to be on a declining scale. Sooner or later, you will run out of power. The real skill that only comes from experience, is to know how much you can use while maintaining a good charge on the batteries. Several factors can affect the charge rate. Hours of direct sunlight, cloud cover, angle of solar panels in relation to the sun, ect. Find that middle ground. In the summer, I powered up my buildings out back with my barn. I have two 20-mile electric fence controllers that run 24 hours a day. My solar power system was virtually maintenance free. I did not have to do anything as the system ran itself. I installed it early this last spring.

We are coming into fall now and the hours of daylight are decreasing. Coupled with extended periods of rain and cloud cover, it remains to be seen how much of an impact it will have on generating electricity.

It will also be beneficial to have a solar powered system in the event of an ice storm. With an array of ten batteries hooked up, I can have emergency power for 2-3 days to power the lights in the house at the flip of a switch. To me, this is a important benefit. Having said this, I believe you can make a more informed decision on your solar powered project.

Comments

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    • profile image

      ameetnigamseo 

      7 months ago

      Solar panels has both pros and cons on our environment.Its a good article.Read more articles on solar energy at https://grameensaururja.com

    • profile image

      Kristen 

      7 years ago

    • profile image

      Kristen 

      7 years ago

      www.solarconnectionma.com answers homeowners questions about solar hot water systems, solar attic fans, solar hot air systems and solar pool heating systems.

    • Rayna Marie profile image

      Rayna Marie 

      9 years ago from Brisbane, Australia

      Are there any countries that anyone knows of that are actually subsidizing the use of solar panels in new homes? It makes perfect sense that a portion of the home's energy be derived from solar given the current implications from the industrial revolution.

      http://www.premiersolarlights.com

    • solar power home profile image

      solar power home 

      9 years ago from UK

      In the UK it does not pay to install solar PV panels yourself (DIY) because you would not receive any tax free income via the government backed feed in tariff.

      http://www.solar-power-home.co.uk

    • Jorit profile image

      Jorit 

      9 years ago from Holland

      Great info here!

      I recently came across an amazing new green energy source that produces 24 kw a day without the use of the sun. Don't be too skeptical and just look at the blueprint!

      If you'd like to learn more about The Free Underground Energy Report, then please read below:

      www.myfreeenergynews.com

      FREE! Discover The Secrets Of Being Able To Generate FREE Power On Command By Using Underground Technology THEY Desperately Don't Want You To Know About"

      That's Right -- This Report Will Show You Exactly How To Harness FREE Power By Using A Little Known, Yet Brutally Effective Concept That's Been Kept Underground Until Now!

      The Free Underground Energy Report

      Jorit van den Bogaert

    • solar.power profile image

      solar.power 

      9 years ago from Brisbane

      Alot of people forget that one of the advantages of having 20+ sqm of panel on your South facing roof (Northern Hemisphere) or North facing roof (Southern Hemesphire) is that they stop the direct solar gain on your roof in Summer. This greatly reduces your cooling costs in Summer, even if you do have ceiling insulation.

    • solar.power profile image

      solar.power 

      9 years ago from Brisbane

      Some good solid technical info. Well done

    • profile image

      Roaring Tiger 

      9 years ago

      I am thinking to use solar panel. It is really good to use natural energy and save money too.

    • jimcain207 profile imageAUTHOR

      James Cain 

      9 years ago from Dayton Texas

      guy poop --what kind of info do you need?

    • profile image

      guy poop 

      9 years ago

      i am dong research project on solar panels and I NEED Information on solar panels

    • guidebaba profile image

      guidebaba 

      10 years ago from India

      I agree, soldering these panels is tiring and with lead-free soldering coming, it gets even more difficult.

    • justinskier profile image

      justinskier 

      10 years ago

      I built a solar heater for free! https://hubpages.com/technology/Free-heat-solar-he Check it out.

    • jimcain207 profile imageAUTHOR

      James Cain 

      10 years ago from Dayton Texas

      De Greek & KenWu--Thanks for coming by. I believe a person can do it with fairly limited electrical knowledge. I would like to post a wiring diagram on the concept.

    • KenWu profile image

      KenWu 

      10 years ago from Malaysia

      I think one should learn some stuffs about electrical/ electronic before proceeding with home built solar power. But thanks for your tips anyway.

    • De Greek profile image

      De Greek 

      10 years ago from UK

      Wonderful! Well done and thank you for this :-)

    • jimcain207 profile imageAUTHOR

      James Cain 

      10 years ago from Dayton Texas

      Primoz-Thanks for coming by and for the comment.I am thrilled to see my light bill going down to record low levels. I plan on a further reduction by a solar hot water heater this spring. I have already recovered the money spent (ROI) and now it is shear profit. I love it.

    • profile image

      Primoz 

      10 years ago

      Homemade solar panels can also be used simply to heat water, which also makes a positive contribution to your energy bill savings. For example, curved mirrors can be used to concentrate light on tubes that carry water. This heats the water and reduces or eliminates your need to pay for centrally-produced hot water. The tubes carrying the water in this type of solar panel are usually painted black, because this maximises their absorption of heat.

    • jimcain207 profile imageAUTHOR

      James Cain 

      10 years ago from Dayton Texas

      MrBurton--THanks for coming by. I will keep this hub updated. I have seen some changes in the winter, but I am waiting on hard data before I post. Check back soon. I will visit your link as well.

    • MrBurton profile image

      MrBurton 

      10 years ago

      Sir,

      I like this hub... please update it as soon as you get new topics of interest, performance during winter or anything else that is new. I would like to point out that since you did this yourself you might want to get an electrician to certify your system... that way you are eligible to receive a tax credit (if you own your place) when taxes are due.

      If not then I would still like to here more from you about this.

      http://www.websolarsearch.com/solar_powered_homes

    • jimcain207 profile imageAUTHOR

      James Cain 

      10 years ago from Dayton Texas

      nicomp--It seemed too complicated for me at first. Then I realized, Hey I can do it! It is not as complicated as everyone leads you to believe. I like the challenge. Thanks.

    • jimcain207 profile imageAUTHOR

      James Cain 

      10 years ago from Dayton Texas

      bayareagreatthing--Thanks for your comment. I plan to keep this hub updated throughout the winter as I have new data to post. Pro or Con. Just stay tuned and check back. :-)

    • nicomp profile image

      nicomp really 

      10 years ago from Ohio, USA

      Great detail. It's refreshing to hear from someone who has actually done it. Keep up the good work!

    • bayareagreatthing profile image

      bayareagreatthing 

      10 years ago from Bay Area California

      I would love to hear a follow up after the winter--I am very intrigued by the use of solar energy but have always wondered how you get through the winter. Great hub!

    • John Cain profile image

      John Cain 

      10 years ago from Dayton, Texas

      I really liked the info about the solar panels. Great write up...

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