The ugly truth behind grid-tied solar systems. A Solar Farm System.

I go through the pros and cons of a grid-tied solar system in detail. We recently had a 9.1kw solar system installed, and even though I am not a solar expert, …

source

16 Comments

  • Excellent presentation. I am a retired electrical engineer who has been dabbling in solar and wind power generation for many decades. My non-grid-tie systems have been small due to the usual high costs and lack of technology. To give a point of reference, I power my garage (mechanical, welding, metal and woodworking shop equipment), outbuildings with refrigerator and freezer, and all outside electrical needs. Basically everything but the house. Now that solar grid-tie equipment is legal, feasible and cheaper by the watt than in the past, I am going to take the plunge and put a system together for my entire property. You have done exactly the same system I want for mine. I subscribed to your channel for more solar videos. Thank you.

  • Perhaps not Ugly truth more of this is how it works 🙂 good video!

    I have 17kW on my roof with 100kWh battery bank and can work all year now. I cover 100% 10/12 months if power goes out. Last 2 months i will survive but not without lowering consumption. Its worth mentioning that we have not changed our useage and during winter we only get 10% compare to summer…..

    Solar is very interesting but there are so many systems out there so its easy to get fooled if you dont know what you are working with.

  • The catch on your ROI is that the grid can start charging or increase the charge for the "grid connection fee" or "utility service fee" which is exactly what has happened in other States where solar adaoption boomed to the point that the electric company in that area had existing delivery costs but not much consumption costs to offset the delivery costs. So when the utility starts charging you $50-100/mo for a connection fee your ROI goes to heck. Reference; https://duckduckgo.com/?q=grid+connection+fee+increase+solar&atb=v74-7__&ia=web

  • I found this video to be quite interesting, and some of the comments as well.  My problem with going to a solar system, would be with warranty and getting anything out of said warranty.  One viewer/commenter (before me) stated that the company that made his inverter was bought out by another company, and is refusing to honor the warranty or even share the schematic diagrams so that someone else could attempt to fix it.  Having gone thru ordeals involving roofing, automobiles, snowblowers, etc., and seeing how many "warranties" aren't worth the paper they are written on,  leaves me sort of gun-shy to take a leap into such a venture as power generation.  Don't get me wrong… Kudos to those who do commit, and best wishes for a trouble-free operation…. But….

  • One of the factors for payback he doesn't mention is the sale of SREC's or Solar Energy Renewable Credits. Each 1000KW you generate you can sell on the open market. (Utility's are required in many States to buy these. Depending on your state that can be as low as $20 or in some states $300+. We sell into a high cost state and reduced our payback to 32 months which we reached 3 years ago.. We also got a State credit which helped. The expected life of the panel is 30 years. Our system is approaching 7 years and is still delivering the same power levels as it was when brand new. Thing to be careful of is if you use a generator, we have a relay to drop out the inverter whenever it runs, the square wave from the inverter doesn't play well with the more rounded generator waves. I have a 10KW system that saves me $250 per month March though November.

  • The Sun irradiates the Earth with some 1.2 kW per sqare meter of energy. IF there are no: nights, and clouds, and dust in the air, and etc… But they always are there. Not to mention the permanent change of the angle the sunlight hits the cells, because the Earth is rotating, that also drastically reduces their efficiency.
    When you now divide the real output of your solar system – no!, even it's theoretical output of 9.1 kW – by the total energy received you'll see it's catastrophically low energy-transformation efficiency: Somehwere in the range between 12 and 14%. And this is the energy efficiency of the old, if not already ancient, well forgotten steam engine that we dumped many decades ago. For that very same reason.
    For a comparison: The turbines in our coal-powered power stations today have an energy transformation efficiency of about 65%.
    Now, you tell us one more time about the "modernity and advantages" of those so called solar "systems" …
    Bad technolgy, bad economics, dude 😉

  • I had a solar system for about 10 years that was completely independent. The city grid was so unreliable that a grid tie would be pointless. I wired it with a cross over that switched to city power when the batteries were depleted. The solar panel/inverter parts were long lasting, the batteries only lasted 5 years and required constant maintenance. The batteries were also dangerous, a weak cell could cause overheating. The city fixed the grid so I no longer needed the batteries. Wouldn't do it again until the battery tech is better. Wonder if the Tesla batteries are good, any experience out there?

  • The type insulators on the poles you pointed at are good for 230 volts max. The huge tower long distance power lines are usually 5000 volts 3 phase. 800K volts would be arcing to ground.
    You should really specify whether you are talking about alternating current or direct current. They do behave very differently.
    At higher amperages; you might find a motor generator set is more efficient than an inverter. 48VDC- 240 VAC MG sets were what the old Bell system used to power the phone system in emergency. Add some surplus submarine batteries and you can be fully powered for a 200 amp household circuit.

Leave a Reply

Your email address will not be published. Required fields are marked *