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Re: Grid tie solar converter

Discussion Board - 10 hours 21 min ago
I have a Smart Grid Tie Microinterter 1000w It has worked well for about 1 yr it has a 15 yr warranty.  I had 1 that went bad while using an arch welder. they replaced it. I now turn it off while welding. The most power i have gotten out of it is about...

Re: where to keep the batts inside or out ?

Discussion Board - 11 hours 24 min ago
QuoteWinter minus 25c
That's pretty cold.  Do you notice much difference in available capacity in the winter?  We've been trying out an EV - a Leaf, in our 3rd year now - which has Lithium batteries.  I have a 64 mile round trip commute to wo...

Re: New project

Discussion Board - 17 hours 6 min ago
Yes I think induction motors are pushed very hard on core saturation, that is how they have reduced the size over the years. The same thing has happened with transformers over the years as higher temperature wire and insulation has become available.

Th...

Re: A look at Peltier cooling

Discussion Board - 18 hours 23 min ago
The Peltier does not seem overworked, warm side heatsink stays at room temps.

There may be another problem, which just a larger Peltier won't cure.

Top mounted Carnot fridges use a relatively large sheetmetal heat sink through which the cold coils run....

Re: Ozone generator with venturie induction

Discussion Board - Sun, 04/26/2015 - 19:09
Oh ya, caps are not to be messed with! even at lower voltages, 300Volts at 1 ferad can cook things in a second if it doesn't just blow up!

All ways keep stored caps with a 1mega ohm bleed resister, higher for higher voltages!

reason I had armor covers ...

Re: A look at Peltier cooling

Discussion Board - Sun, 04/26/2015 - 19:02
Stacked, he could have a mega watt peltier the temp diffriential is the same.

Think of it like this, heat is water, the pelt is a pump, you got to lift the water up a hill but just one pelt can only get it half way at best, on average only a quarter of...

Re: New project

Discussion Board - Sun, 04/26/2015 - 18:50
should probably go in user diaries, i forgot we had that subforum.

I don't know whether its more tooth saturation or core saturation (i know its some combination of both) on small induction motors but I've had a very difficult time getting nominal line...

Re: Ozone generator with venturie induction

Discussion Board - Sun, 04/26/2015 - 17:29
I have RF amplifiers that run at high voltages(2.4kv 1 amp supply). During a fault in a tube the ceramic 50 watt surge resistor exploded and sprayed shrapnel all over the inside of the cabinet. Some piece punctured the screen over the tube for cooling ...

Re: A look at Peltier cooling

Discussion Board - Sun, 04/26/2015 - 17:21
If you move to a larger peltier it will help. And I think your setup could handle one. Or stacked...

Re: A look at Peltier cooling

Discussion Board - Sun, 04/26/2015 - 15:19
Tested my setup as described here.

Ambient temps inside home 20°C (68°F)
Fridge placed in the most shaded corner of the house
Peltier fed 12 volts / 3 amps from a laptop charger (place...

Re: where to keep the batts inside or out ?

Discussion Board - Sun, 04/26/2015 - 10:22
Hi ya Kitestrings,

Touques Valley, 10 miles from Camembert, (cheese place) Normandy, France.

Winter minus 25c, summer plus 35c, But that mass of water plus the spring water is always at a constant temperature.

The Lavoir has No doors, No front covers....

Re: where to keep the batts inside or out ?

Discussion Board - Sun, 04/26/2015 - 06:39
My home is a 30 foot rv to understand:

On the front table there is a storage compartments, I normally never use them, so I sealed it gas tight, insulated it, put heater and control system in it for the heater, then batteries

So they are inside the livi...

Re: where to keep the batts inside or out ?

Discussion Board - Sat, 04/25/2015 - 17:24
You didn't mention where you live.  If temps are extreme, in either direction, in the house can be a plus compared to an uninsulated unheated (or cooled) location.   Where we live winter lows complicates putting them in an out-building.

I like the "Lav...

Re: Blocking Diodes Assembly

Discussion Board - Sat, 04/25/2015 - 17:04
Y,

When you say blocking diodes, you're talking about a rectifier?  Typically people either buy a "potted" bridge rectifier or, build a stud-diode rectifier.  The potted types are simple, inexpensive but probably not as robust.  If your building one wi...

Re: Ozone generator with venturie induction

Discussion Board - Sat, 04/25/2015 - 16:46
Final drive is I need to push 25Kv  we're making ozone via coronal discharge here, that means high voltage energy transfers! this whole system works on electrostatic fields. we are making a cold plasma cell (Well won't be cold for long)

Guss I should h...

Re: Ozone generator with venturie induction

Discussion Board - Sat, 04/25/2015 - 15:13
6.2kilovolts!!! at .6 amps!!! you are playing with a very dangerous voltage level that can blow a hand off if you touch it!

Re: where to keep the batts inside or out ?

Discussion Board - Sat, 04/25/2015 - 15:09
My system is all internal inside the house. Batteries would be the least of their worries though. I have a pretty good sized ammunition collection, powder for reloading, primers for reloading...

Re: where to keep the batts inside or out ?

Discussion Board - Sat, 04/25/2015 - 14:43
Many years ago I watched a fire as the firemen waited for the utility company to come and shut off the electric before they took action.  These power systems are confusing to inspectors and emergency personnel.   A visible disconnect  on an external sh...

Re: where to keep the batts inside or out ?

Discussion Board - Sat, 04/25/2015 - 03:34
I think it depends on battery size, and your circumstances.

Here's some photo's of my 2 tons of AGM,s & GEL types batteries 48v 1300ah. The batteries have been here about 5 years.

The Building they all sit in is 100 yards from the main house. Its a res...
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