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Re: Lead Acid Battery Balancer.

Discussion Board - 1 hour 50 min ago
That's a good advice but I already have 12V batteries thus I have to pay more attention to keep them well balanced.

Re: Building a 6kw pure sine wave inverter using power jack boards part1 transformer

Discussion Board - 1 hour 55 min ago
My commercial transformer was custom made: OD=310mm, ID=120mm, H=110mm, W=39kg (85 lb), 16/125 turns, 30V/230V, high-quality "japan made" silicon steel (according to mfr).

It works OK but I could hear some random noises (vibrations) during normal oper...

Re: Building a 6kw pure sine wave inverter using power jack boards part1 transformer

Discussion Board - Thu, 07/30/2015 - 19:37
I use west systems.... as I was given 25 liters of the stuff.

We are only using the epoxy for noise and wire stabilization. If you have a commercial torroid, it will likely not have good separation between wires.. these now do.

Just dunking it won't he...

Re: Going to be adding on in a major way

Discussion Board - Thu, 07/30/2015 - 19:03
I can't meet their requirement for grid tie. I need perfect south and 60 degrees on either side of that that are clear of obstructions. Not going to happen here. Plus a $300k liability insurance policy, plus a monthly connect fee on top of what I pay a...

Re: Newbie help with bike axial flux generator

Discussion Board - Thu, 07/30/2015 - 18:09
Ceramic mags always need to be cleaned before gluing down,,not sure on the Nickle coated mags,,,,,

Re: Lead Acid Battery Balancer.

Discussion Board - Thu, 07/30/2015 - 17:25
Build your stack out of single cell 2V units like forklift batteries and balancing is easy. Charge one cell at a time is you have to.

Re: Lead Acid Battery Balancer.

Discussion Board - Thu, 07/30/2015 - 17:06
I was thinking about balancing by connecting a small dummy load across the most charged battery/batteries in a series string.

I could mount such a dummy load (10-20W, relay driven) across every battery then I could build a small monitoring board to au...

Re: Building a 6kw pure sine wave inverter using power jack boards part1 transformer

Discussion Board - Thu, 07/30/2015 - 16:48
That's a real hardcore project you've done (both master and apprentice)! I payed good money for a commercial version (though mine looks bigger/heavier, though it's 5kW rated).

Anyway, I heard you talking about casting it in resin, to reduce noise/vibra...

Free Beckman model 730 easy BOB

Discussion Board - Thu, 07/30/2015 - 15:55
My father, who died almost a year ago, did computers and telephone related work from the 1950's until his retirement. Among the instruments he left behind is a DB25 RS232 debugger. I know some of you here still use rs232 interfaces for data logging. If...

Re: Going to be adding on in a major way

Discussion Board - Thu, 07/30/2015 - 14:57
Mary B as a suggestion and if you have room take off the insulation off of you water heater and the plumb it in front of your on demand water heater and let the warm air inside the house warm up the tank, (ground temp is around 50 degrees so even 15 he...

Re: Bambie almost killed me

Discussion Board - Thu, 07/30/2015 - 14:21
NEVER use heat to remove a tick, they puke out into you while releasing ensuring you get any pathogen they're carrying!

best is use a pair of needle clamps and take the skin around it with it! push down grip and twist and pull.

As suggested use a perme...

Re: Going to be adding on in a major way

Discussion Board - Thu, 07/30/2015 - 13:44
If you can get credits for excess generation, then there is only one way forward.
A hybrid system is a non starter, as you have all the expenses of off grid, and the expenses of on grid, and your living like a pixie... there should be no compromise if ...

Re: Building a 6kw pure sine wave inverter using power jack boards part1 transformer

Discussion Board - Thu, 07/30/2015 - 13:03
The mounting bolt is to be treated as a single very high current turn... in this context, that means nothing may allow a circuit to form between the base/chassis and the top of the bolt/plate. If it does, high current will flow in the bolt and we don't...

Re: Active Equalisation

Discussion Board - Thu, 07/30/2015 - 09:08
Bulk of us know this all ready, what I am wondering what is "your" point and or view?

Re: Going to be adding on in a major way

Discussion Board - Thu, 07/30/2015 - 06:14
Hi Mary B,

Its a fairly big step to go totally Off Grid. But we have been slowly shifting for the past 10 years.

We here have Grid Utilities but use it as a standby generator when there's no wind and no sun. We are not Grid tied to the main Utilities s...

Re: Building a 6kw pure sine wave inverter using power jack boards part1 transformer

Discussion Board - Thu, 07/30/2015 - 05:27
Quote from: oztules on July 29, 2015, 02:05:22 PMone more turn would be better, but it will be fine as it is.... you will do better with flat batteries ... you have more head room.

Your cores are slightly less cross sect...

Re: Building a 6kw pure sine wave inverter using power jack boards part1 transformer

Discussion Board - Thu, 07/30/2015 - 05:07
Quote from: niall2 on July 29, 2015, 04:07:42 PMi,ve no idea technically whats going on here but its fascinating to watch .....good luck Clockman

Thanks niall2. I sort of see the principal and concept of the 8 to...

Re: Going to be adding on in a major way

Discussion Board - Thu, 07/30/2015 - 00:57
One thing that helps us is MHRV (mechanical heat recovery ventilation) in the kitchen (which lets us dry clothes on the clothes horse inside in winter; we never need a dryer) and the bathroom.  The fans only use a couple of watts each (and run at 24V i...

Re: Going to be adding on in a major way

Discussion Board - Wed, 07/29/2015 - 17:53
I forgot to add, I already have 2400 watts of off grid solar and a 928 amp hour battery bank(24 volt system) that is running my ham gear, computer system, and the freezer to fridge conversion. add another 5kw off grid and I will have plenty for most of...

Re: Going to be adding on in a major way

Discussion Board - Wed, 07/29/2015 - 17:49
Unfortunately the control freaks have passed ordinances, everything I install has to meet electrical code and be UL approved. It will all have to be inspected, approved, signed off on... And after reading the hoops I have to jump through to grid tie, t...
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