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Updated: 17 min 21 sec ago

Re: enertech 1800

1 hour 9 min ago
Wouldn't something like that work best on a windmill built for torque and using gearing between the turbine and generator?

Solar battery bank back up charging with a Generac generator hook up.

2 hours 40 min ago
Solar off grid battery bank recharging with a 17KW Generac generator. Is it possible to automatically recharge a 48V battery bank by having the Generac come on before the inverter shuts the system down, when the batteries get too low, due to snow cover...

The 4th China (Guangzhou) International Biomass Energy Exhibition 2015

5 hours 51 min ago
The 4th China (Guangzhou) International Biomass Energy Exhibition 2015
                     Date: August 18th-20th, 2015         
     Venue: China Import & Export Fair Pazhou Complex (Area B)

Guangzhou International Biomass Energy Exhibition (CNIBEE...

Passive Pitch control

7 hours 55 min ago
Hi all ...I am a newbie to this site. There is a lot information getting exchanged on this forum. I am trying to design a 5 kW wind turbine and I need help in putting a passive pitch control mechanism. Unable to get any specification or dimensions.  :-...

Re: enertech 1800

Wed, 01/28/2015 - 17:45
And this was when Enertech first formed then went under... not the current Enertech. A local was selling/building these under that name. Fiberglass fairing with twin tails that swoop out at the ends.

Re: enertech 1800

Wed, 01/28/2015 - 17:27
This is an upwind design, there are a few like it around here from when Enertech first started. Next time I head that way I will snap a picture of it.

Re: The best voltage to regulate AGMs to?

Wed, 01/28/2015 - 13:26
IIRC it's -3mV per cell per degree Celcius.

Personally, I tend to seasonally adjust my setpoint rather than automate it, but them my batteries are indoors where the variation is small anyway

Re: Store bought rectifier

Wed, 01/28/2015 - 10:10
@  Xan at a few milliamps forward current, the forward voltage drop for a 30 amp schottky diode will be as low as .2 volts, and at an amp it might be .3 volts. at 30 amps which is what the package is rated for (T0-247 case) you might have .6 to .9 volt...

Re: Store bought rectifier

Wed, 01/28/2015 - 09:59
Surplus branded items are good value. Most of the cheap unbranded stuff is junk.

Car alternator diodes are probably ok for voltage rating but you will probably find no figures.

Diodes with a piv under 200v are basically scrap so as stated 50v ones will...

Re: Store bought rectifier

Wed, 01/28/2015 - 04:43
I have an 1970's electronic magazine where they built a solar panel up from individual cells. It was pretty small and would not even have produced an amp but they specified a 25 amp diode (I think it might have been for an alternator). The reason for t...

Re: The best voltage to regulate AGMs to?

Wed, 01/28/2015 - 02:52
Thanx Flux, that's good to hear as they seem to be going well like this and no, I haven't heard (or seen) any evidence of venting at all...unlike a naughty gel battery I have, but I am not too concerned about that one right now as I suspect it has a di...

HYE turbine and xantrex

Tue, 01/27/2015 - 22:53
Hi Guys
Hope all well. I have owned a few HYE Turbines for the past few years now. They are pretty good and not that bad at all. Please note that windmax is not HYE. They only sell a few of their products and have tainted the HYE name by selling their ...

Re: enertech 1800

Tue, 01/27/2015 - 18:03
 Mary B, it would be interesting to see a twin tail Enertech. They were down wind machines, as best I can remember. Not saying you are mistaken, just very curious to see one.

 Maybe it was an experimental design ?

Re: new home construction

Tue, 01/27/2015 - 16:06
Just my opinion, but I believe even done right, low voltage plugs would affect price.  It might effect the price up with the perfect buyer who was looking for that but for the majority of buyers, I believe they would beware due to the fact of not under...

Re: new home construction

Tue, 01/27/2015 - 15:50
Long as the low voltage wiring complies with NEC it won't affect insurance at all. I don't see it damaging resale value either if done right with wall outlets designated for DC use(powerpoles etc) and they could be combined with other low voltage outle...

Re: enertech 1800

Tue, 01/27/2015 - 15:32
I drive by a twin tail enertech machine a couple times a month. Tip brakes as you mentioned. They re always tripped and keeping it from producing much.

Re: Weatherproof Rectifiers

Tue, 01/27/2015 - 14:12
I would not have mine on the tower but for that I built 5 phase stators and at that point it was just two many conductors to run to the ground.  Even hugh who desined this turbine, said this was one of its weaknesses.  I don't worry about wetness but I...

Re: Weatherproof Rectifiers

Tue, 01/27/2015 - 12:54
QuoteI was hoping to attach the rectifiers on the back of the plate
Just my $.02, but I wouldn't do it.  As stated they are subject to failure with nearby lightning, and the 3-phase down to the ground is a bit more efficient I believe (though...

Re: enertech 1800

Tue, 01/27/2015 - 12:47
I'm going to give away my age here...but, I worked for, and on Enertechs for a number of years when they were in business.  Most of what's been said is correct.  The 1800 was an AC induction motor some minor winding changes to improve efficiency.  It's...