Where did you purchase them in Miami?
It is SUNELEC.COM They have unbelievable deals. They also ship from Arizona I think... They have tens of thousands of panels for prices typically between 30 to 50 cents a watt.
Solar power for the home is now way under the cost from the utilities, but only if you are grid tied. If you try to store the energy in batteries every day, your costs for the system will triple and you will have battery maintenance issues for life. Plus not enough power in the winter, and too much in the summer.
So it is so cheap, but here are many considerations....
* Solar energy now costs much less than the utilities if grid-tied. * But only in states where the utilities are not sleeping with the politicians * You cannot grid-tie unless you have a licensed electrician do it and get all the permits. You will pay around $3/watt installed. * Hint for DIY types: Contract for a very small system. Then add your own panels later (while fully following NEC code).
* Going off grid makes no economic sense whatsoever if you have the grid. You will pay three times more for the batteries and never recoup the investment as you always have to maintain and replace batteries for the rest of your life!.
* Solar panels are excellent for remote sites where you have no grid and having battery solar power is worth paying triple what it is worth.
* Solar panels are great for RV's, Boats or Electric cars... ANYTHING that already has to have a battery anyway, may as well charge for free.
** A small solar panel on the house for the shack makes no economic sense whatsoever. You have the grid, so just charge the shack backup battery from the grid. Don't bother with solar. Also, every single day the grid is UP, you are not using the backup battery so your solar is producing absolutely nothing anyway 99.96% of the time (In Maryland anyway, that is the grid reliability)..
** But if you plug that solar panel into a small 500W Grid-Tie inverter that just plugs into a home outlet (cost under $100 on ebay) then you DO get full retail value from the solar everyday for ever AND you can use the panel direct when the grid goes down. butt don't get greedy...
** But ONLY if you never backfeed more than you are using every minute of the day. If you ever backfeed more than you use, you will pay double for it. ALl non-NET-meters charge for electricity going through the meter no matter which way it goes! So you pay when you over produce and you pay again when you draw it back out later. That is why you MUST have a NET meter to have any hope of economical solar in bulk.
** Thus, a plugin grid tie more than one or two panels will end up COSTING you for every watt you over produce. So, again, the only economical solar is whole house legal net-metered grid tie. And it is so cheap it makes no sense not to do it that way.
But if you still want to have a single panel for $100 its great to have 30 volts at 7 amps from the sun, even if you just waste it. But then having to pay $100 for shipping for a $100 panel doesn't make a lot of sense either...
Your mileage may vary. Bob, WB4APR
On 8/25/2017 5:17 PM, Robert Bruninga wrote:
I am about to buy a truckload of solar panels for my church and various projects. Delivery from Miami to Annapolis Maryland is several hundred dollars so if anyone local wants to pile on and get some panels, Ill consider adding some more.
These are 285 Watt Trina panels 30v at about 7 amps. 65” by 39”. 40 Lbs each. Black frames.
Cost is about $100 each.
You must pick them up from Annapolis.
Bob, WB4APR _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb