Skip navigation

 Photovoltaic (PV) power is becoming popular worldwide as an alternative to grid power for various reasons. It gives an energy independence and freedom, it helps reduce greenhouse gas emission and combat global warming, it helps people taking advantage of various Government subsidies and incentives, and it also generates some revenue by selling surplus power back to the grid. At the end of the period you own the system and claim depreciation and some tax benefits. All these compelling factors may motivate people to opt for PV solar power. But you should also do some math and make a cost benefit analysis to choose a right system for you.

When there is a good sunshine day after day and throughout the year, PV solar is good proposition and can be really rewarding. Unfortunately that is not the reality. There may be many cloudy, rainy and fogging days in a year and your PV solar capacity may be overestimated or underestimated. You know the real data only after one or two years of life experience. It is a long-term financial and ethical decision one has to make and the decision should be absolutely right. You can make such a decision by carefully examining all the factors, not just by looking at the first cost but looking at operating and maintenance costs and all the costs and benefits associated with them.

Storage batteries are inevitable in PV solar systems, especially for grid independent systems. Even with grid connected PV solar system the design and installation of a correct battery bank, controllers and rectifier are important issues. In this article we will discuss about grid independent system because many developing countries in Africa and Asia do not have 24×7 uninterrupted grid power supplies. Many people living in islands have to manage their own power by using diesel generators. This is the stark reality.

Let us assume that you design a system assuming a daily average power consumption of 25,000 kwhrs/day, which is suitable even for a medium size family in US. We made an optimum design study between two  systems; first  containing PV solar,battery,controller for grid independent power supply; and second  system with PV solar, battery, water Electrolyzer,Hydrogen storage  and PEM Fuel cell and a rectifier for grid independent system,  based on the same power consumption of 25,000kwhrs/day. You can clearly see the difference between the two systems by the following data.This financial analysis was made assuming there is no Government subsidies and incentives.

Grid independent system with battery storage for 25,000kwhrs/day power:

Total NPV (net present value):$ 342,926

Levelized cost of energy: $2.94/kwhrs

Operating cost/yr: $22,764

Grid independent system with Hydrogen storage for 25,000kwhrs/day power:

Total NPV (net present value): $ 169,325

Levelized cost of energy : $ 1.452/kwhrs

Operating cost/yr: 8,330

The number of batteries required in the first case is 17 numbers. In the second case, number of batteries required is only 2.Obviously,  the levelized cost of power using  PV Hydrogen (storage) is less than 50% of the power generated using PV battery (storage) for the same energy consumption of 25,000kwhrs/day. The operating cost is only one-third for PV Hydrogen system compared to battery system. Batteries are indispensable in any renewable energy system but reducing their  numbers to the lowest level is important, when the life of the system varies from 25 years to 40 years. The numbers and the cost of batteries and their maintenance cost  will make all the difference.



  1. Took me time for you to read all the responses, however truly loved the article. It turned out to be invaluable to me using this program . sure to all the commenters here! It can be continually amazing when you can not only be informed, but in addition entertained! I know you had entertaining writing this article. Regards, Clotilde.

    • Sorry for this delayed reply.Thank you for you comments and I appreciate.

  2. Thank you.

  3. your blog is very simple but i like it because it is very well structured.

  4. Hey! Would you mind if I share your blog with my myspace group?
    There’s a lot of people that I think would really enjoy your content. Please let me know. Thanks

    • Hi, Sure you can share my blog with your group. Thanks. Ahilan.

12 Trackbacks/Pingbacks

  1. […] link: Why should you change your Photovoltaic battery to Photovoltaic … This entry was posted in Uncategorized and tagged becoming-popular, combat-global, […]

  2. […] = 'none'; document.getElementById('singlemouse').style.display = ''; } Why should you choose Photovoltaic Hydrogen over Photovoltaic battery? var topsy_style = 'big'; var topsy_nick = ''; var topsy_order = 'count,badge,retweet'; var […]

  3. By URL on 09 Jun 2012 at 2:25 pm

    … [Trackback]…

    […] Read More here: […]…

  4. By visita on 11 Jun 2012 at 11:45 am

    … [Trackback]…

    […] There you will find 62463 more Infos: […]…

  5. By raspberry ketones on 11 Jun 2012 at 3:11 pm

    … [Trackback]…

    […] Informations on that Topic: […]…

  6. By pret immobilier on 11 Jun 2012 at 9:01 pm

    … [Trackback]…

    […] Read More here: […]…

  7. By fix windows xp on 12 Jun 2012 at 11:02 pm

    … [Trackback]…

    […] Informations on that Topic: […]…

  8. By treasure hunt for kids on 13 Jun 2012 at 1:09 am

    … [Trackback]…

    […] Read More here: […]…

  9. By on 13 Jun 2012 at 1:32 am

    … [Trackback]…

    […] Find More Informations here: […]…

  10. By hotels curacao on 13 Jun 2012 at 5:16 am

    … [Trackback]…

    […] There you will find 68225 more Infos: […]…

  11. By vedi la pagina web on 13 Jun 2012 at 9:52 pm

    … [Trackback]…

    […] Read More here: […]…

  12. By on 14 Jun 2012 at 1:21 am

    … [Trackback]…

    […] Read More here: […]…

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: