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Updated: 25 min 36 sec ago

Re: resistive load bank

1 hour 21 min ago
I was thinking along what you came up with, parallel strings of heaters. They run cooler than a spring might so less of a fire hazard was my thoughts.

Re: 16 volt scooter batteries

1 hour 23 min ago
Yes that can kill a battery when it self discharges and then freezes crushing the plates together and causing shorts.

Re: wind farm ???

1 hour 25 min ago
Buffalo Ridge here in MN affects local weather quite a bit, storms split and go around me quite often and the wind farms along it have not changed a thing. Up slope SW side is often wetter in summer and my side is drier. And that is only a 500 foot rise.

Re: wind farm ???

1 hour 52 min ago
what is the set back distance from existing residential
that is the key to happy neighbors and a successful  installation .

Re: 16 volt scooter batteries

2 hours 37 min ago
so anyway these are sealed lead acid batteries.
they still produce the proper voltage
could they have discharged so badly over the winter as to render them now useless.?

Re: wind farm ???

3 hours 2 min ago
If you want to become an advocate and "pick a side", then get in line, and check your brain at the door. 
If you want to stand in the middle, and attempt to balance all viewpoints with reason, then good luck, but be prepared to learn who your real fri...

16 volt scooter batteries

3 hours 35 min ago
my friend bought one of these little scooters. it's a 48 volt using three 16 volt batteries
he let them sit all winter inside without charging  and now they are dead. he left them on the charger over night bu still nothing . any advise ? any sources of...

Re: resistive load bank

4 hours 7 min ago

Well, I looked this (and tried to say it above, typo not withstanding).  They make 120V units up to 1,500w.  At that size, I make the rated current at 12.5A, and resistance at 9.6 ohms.  So, in a wye configuration we'd need to parallel pairs of ...

Re: Automotive alternator to PM alternator

4 hours 13 min ago
The original rotor would have been a claw type with 6 claws each side and a wound field coil between them.

If you had the original claws you could have fitted a ring magnet in place of the wound field. As you don't have the claws and they are difficult...

wind farm ???

4 hours 19 min ago
ok folks here goes

locally there is a move afoot to install a windfarm, and of course there are those  both for and against doing such things.

while i have no dog in the hunt so to speak (no land involvement) i have a bit of technical knowledge that th...

Re: resistive load bank

Tue, 04/22/2014 - 17:03
they do make 120v baseboard


Tue, 04/22/2014 - 16:31

Re: Experience with Heat Pump Water Heating

Tue, 04/22/2014 - 07:58
A house has to be thought of as a system.  My parents have an ideal application for a HPWH.  Thier house is only 15
years old but it has a very inefficient oil heating system.  It is ironic that this was once a solar heated home.  The
rock storage ta...

Re: resistive load bank

Tue, 04/22/2014 - 06:29
QuoteBetween 80-150 volts I would be very tempted to use an electric baseboard heating element...
I've considered some additional "opportunity load" using baseboard or a space heater through my inverter (winter); perhaps ice making summer.


Re: Micro inverters versus String Inverters

Mon, 04/21/2014 - 23:36
That was a good read Paul. Thanks!
Oz- that was genius! I couldn't duplicate that one easily without more info... Thanks!

Re: Automotive alternator to PM alternator

Mon, 04/21/2014 - 22:09
I have been looking for a high pole count stator for my low speed requirement in approx. the 4" dia. size. Anything larger in diameter will not work for this project. I need 12vdc under load from this system at approximately 400 RPM. I am not ...

Re: Automotive alternator to PM alternator

Mon, 04/21/2014 - 20:38
12 poles. use this link for more alternative winding ideas: https://www.emetor.com/edit/windings/

any particular reason why you want to use a automotive alternator stator?
do you intend to keep the rotor or start over?

Re: Hugh Piggott blades, Fiberglass, testing and failures.

Mon, 04/21/2014 - 20:14
Quote...I also noticed that the grain was also a possible contributing factor to the joint opening, as each piece of cedar was different in density and probably had different movement characteristics, just a thought...
Yes that's plausible, b...

Automotive alternator to PM alternator

Mon, 04/21/2014 - 17:20
I am the model engine builder guy that sought help here a few years ago on a scale model engine slow speed electric plant. The 1:10 scale 1906 vintage stationary gas engine runs a 6" dia. alternator built from a ceiling fan motor. Thanks to ghurd a...

Re: Researching rainwater catchment

Mon, 04/21/2014 - 14:27
Due to an internal server error, my immediately prior post was duplicated. Sorry about double-posting!