frontpage Posted by DesertGardener | Staff ā¢ Last Thursday
Jun 19, 2025 6:26 PM
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frontpage Posted by DesertGardener | Staff ā¢ Last Thursday
Jun 19, 2025 6:26 PM
12-Pack ECO-WORTHY 410W 31V Mono Solar Panels
+ Free Shipping$1,530
$2,000
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In April 2021
ROI is looking like 8 years
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You will need few more components
In April 2021
ROI is looking like 8 years
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Why would you need 1000V? Anything above 600V is extremely dangerous. Residential max voltage is 240. Most receptacles are 110V.
If you are static mounting them (vs on a system that tracks the sun) realistic you might get 30% of rated capacity ( and lose to conversion if going to AC ) per hour of daylight unless you are washing them off frequently they will get dusty/dirty, clouds, rain, ice/snow ( if more north ), bird poop, etc etc.
Living more northern than Florida/etc reduces efficiency as well, and the components probably are not ALL going to last for 5yrs+ so you'll be fixing it and investing money and testing and maintaining ( and potentially a fire hazard )
Then you also have to look at the investment potential in some cases people are spending 20k plus that's not an insubstantial amount of money, invested in the s&p500 in the last decade it would have earned a good amount likely outpacing the savings of solar.
I guess it's also nice we live in a relatively low cost of power, I think we are paying like 0.09 per KWH so it makes it really difficult to show a 3-5 year ROI which is what I generally look for... Maybe if I was paying closer to 40c per KWH I could see it but you just have to math it out and the variables for your specific scenario.
Yup, don't know where people are getting these numbers. I've done the math every which way and come up with a similar timeframeā¦ best case scenario
If you are static mounting them (vs on a system that tracks the sun) realistic you might get 30% of rated capacity ( and lose to conversion if going to AC ) per hour of daylight unless you are washing them off frequently they will get dusty/dirty, clouds, rain, ice/snow ( if more north ), bird poop, etc etc.
Living more northern than Florida/etc reduces efficiency as well, and the components probably are not ALL going to last for 5yrs+ so you'll be fixing it and investing money and testing and maintaining ( and potentially a fire hazard )
Then you also have to look at the investment potential in some cases people are spending 20k plus that's not an insubstantial amount of money, invested in the s&p500 in the last decade it would have earned a good amount likely outpacing the savings of solar.
I guess it's also nice we live in a relatively low cost of power, I think we are paying like 0.09 per KWH so it makes it really difficult to show a 3-5 year ROI which is what I generally look for... Maybe if I was paying closer to 40c per KWH I could see it but you just have to math it out and the variables for your specific scenario.
I live way above Florida and the NREL estimates a yearly energy production of 5600 kWh for 4 kW installed capacity, i.e. a very short ROI of less than 2 years at the national average cost of electricity (0.17 USD per kWh). Of course this would significantly increase with the cost of inverters, even more with battery and then paying for install would "kill the deal" but the ROI on solar panels themselves is very short nowadays.
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If you DIY the return on investment is 6 to 7 years in most cases. If you pay a professional it's more like 15 to 20 years on a system that probably last 20 years
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