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ke4pym
Premium
join:2004-07-24
Charlotte, NC
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reply to cowboyro

Re: I've gone and done it ... solar install

said by cowboyro:

said by ke4pym:

The panels are guaranteed to produce 100% of their rated output for 25 years.

Such panels haven't been invented yet. They all lose capacity in time, with the biggest drop in the first year. Maybe they are rated for less than what they can produce

I can't speak to this one way or the other. So, if the rated output drops, I get replacement panels. So, either way, win for me.

dennis-->I've been told 2 different things.

I asked my installer about what happens when the power goes out. He explained that the system has an anti-islanding feature. So, if the power goes out, they stop sending energy into the grid. Makes sense. Don't want to electrocute a lineman expecting the lines to be dead and I'm putting energy on them.

However, one of the customers I spoke with (I conduced 4 calls with 4 different customers) said that his meter (net-metering) will stop the energy from back-flowing to the grid if the power is out. And his home will still benefit from energy from the panels. And he's tested it thanks to his power going out several times since his install.

If I wanted to put in a battery system (which is an option, but I don't have a suitable place to store the batteries or want to put up with the expense) I could run from that at night if the power was out....


cowboyro
Premium
join:2000-10-11
Shelton, CT
said by ke4pym:

If I wanted to put in a battery system (which is an option, but I don't have a suitable place to store the batteries or want to put up with the expense) I could run from that at night if the power was out....

Don't bother, it's not worth it. Batteries have a life of 3 years, 5 if you're extremely lucky.
Powering only 1000W for 4hrs will require some 4500Wh from batteries.
A single typical 12V/60Ah deep cycle battery gives 720Wh at low drain. You'd need a bank of ~10 such batteries to sustain the load for 4hrs. Given the cost of $125-ish for a single battery you'll be better off running a small generator in the event of an outage.

iknow
Premium
join:2012-03-25
said by cowboyro:

said by ke4pym:

If I wanted to put in a battery system (which is an option, but I don't have a suitable place to store the batteries or want to put up with the expense) I could run from that at night if the power was out....

Don't bother, it's not worth it. Batteries have a life of 3 years, 5 if you're extremely lucky.
Powering only 1000W for 4hrs will require some 4500Wh from batteries.
A single typical 12V/60Ah deep cycle battery gives 720Wh at low drain. You'd need a bank of ~10 such batteries to sustain the load for 4hrs. Given the cost of $125-ish for a single battery you'll be better off running a small generator in the event of an outage.

which is why they make solar batteries, guaranteed for 20 years, and it's much cheaper to run off stored energy from solar cells, than run a generator.