J
Josepi
- Jan 1, 1970
- 0
Appearances in court and the costs were not funny to my wallet.
That's too funny...
Jim Rojas
That's too funny...
Jim Rojas
Josepi said:The answer is "It depends"
The AC output needs to be isolated from the DC by a transformer in the
inverter other wise none of the leads should be tied together. This would be
like crossing the terminals on your DC supply when certain triacs or gates
are firing inside.
The phasing of the units need to be in synchronisation. Grid tie units
require a "grid" to syncronise to. If they are out sync you would get 240
Vac sometimes and zero other times as the phses wander in timing to each
other.
Firings of noise inverters can maltrigger the other unit. This would be
similar to "bad power".
The factory would need to be consulted. It may be cheaper and more reliable
to us ea 120 // 120/240Vac step up transformer.
If your bills are $400 per month I doubt if anything you buy under $10K will
run that load.
2 x 500watt inverters make a total of 1000 watts. Now you are generating 10
cents worth of energy every hour. You could run a small stereo or computer
but nothing that heats anything.
1000 watts coming from a 12 volt battery = 1000W / 12V = 83 Amperes. You
will need some heavy copper cables and and more than a car battery. It will
be dead in a short time. See "Peukert factor"
Generating your own electrical energy will never be as cheap as the grid.
Let me ask you a question.
Can 2 250-500 watt ($100-$200) inverters share the same input DC power,
but yet be plug into 2 different phases?
My house runs on all electric. The bills in the summertime peak at $400
a month. I would gladly spend $2000 on GTI's if they can be plugged in
to my 220v panel on both phases.
Jim Rojas
Josepi said:Appearances in court and the costs were not funny to my wallet.
That's too funny...
Jim Rojas
Josepi said:Search for a combo grid-tie unit.
Look for a unit that will do grid-tie, take batteries and island generate
also.
Ca. people (where most of the PV is used) have different requirements, only
to save money by feeding into the grid and without the cost of batteries.
You want to island and that requires batteries. There are units out there
that will do both. I have one but the company is gone.
I am just looking to reduce my usage by at least 50 percent. 1000 watts
is just to start off with.
We get alot of power outages here in Florida. I do have a 6000 watt gas
generator. It basically ran everything in my home except for the power
hungry stove, Central Air, clothes dryer, and hot water heater.
So if I can get up to at least 2000-3000 watts, I'd be more than happy
with that.
Jim Rojas
Josepi said:If they are turning the same speed and locked together they could be
parallelled permanently, as they should always be in sync. I would want some
fusing betweem them and switching to isolate, in the event of a problem,
though. Better only one running than nothing due to one with a problem.
In the **OLD** generating plants, they had light bulbs between the two
systems and closed the switch between them when the bulb was dimmest.
If separate mechanisms they need to be up to speed, and sync'ed to close the
tie switch. Then they will electrically drive each other at the same speed
unless one jammed...need fusing.
I have another question.
Let's say I have 2 220v 3000watt AC generator heads that spin at 1800
RPM. I know how to manually sync them in parallel so they provide 6000
watts. But at a dead stop, can I start them back up without resyncing
again? I don't want to find this out the hard way. They will be both
pushed by the same microhydro flywheel. A single pulley and a serpentine
belt with a tensioner.
Jim Rojas
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John said:Jim Rojas explained on 18/10/2010 :
The real truth of this thread is
Jim, You are in way over your head and if you want to live to a ripe old
age I would advise that you give up such wild eyed designs and stick to
crystal sets.
Messing with power at thousands of watts is not for the uninitiated.
The slightest mistake could very easily be your last.
And do not forget there are GIGAwatts of power out there on the grid
just itching to find someone like you to let them get off the grid snd
destroy what ever is in their path.
(¯`·.?Rightards eat shit®?.·?¯\ said:I would nerver rely on semiconductors. They are too easy to be killed. Relays are the best choice.