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Re: From New SMA INVERTER SI6.OH-11, battery full 50HZ Jumps to 60Hz

2 hours 20 min ago
Quote from: DamonHD on Today at 06:28:30 AMSome of an individual's customer experience will be luck.

Yes that's true, or bad luck in your case.

I've dealt with many of their support and techy folks over nume...

Re: From New SMA INVERTER SI6.OH-11, battery full 50HZ Jumps to 60Hz

3 hours 32 min ago
I have four SMA grid tie inverters which seem to work well.

On the other hand they have been completely unhelpful with me on a related minor matter that would probably have been easy for them to resolve, or explain why they couldn't, even when approach...

Re: From New SMA INVERTER SI6.OH-11, battery full 50HZ Jumps to 60Hz

3 hours 58 min ago
With regard to the previous post.

The incident depicted occurred approximately 4 years ago, partly due to an experiment by the local installer, but primarily due to the proximity of heat and combustible materials.

Simply, the dump loads where not insta...

Re: F&P Setup

Thu, 05/28/2015 - 16:14
Quote from: Bruce S on May 28, 2015, 08:58:34 AMOZ;
First and Foremost, thanks for the very informative post!!
I think I'm going back to being a doorman  .

@bart;
Good eye!!
I'm told they do actually have a DC rating, ...

Re: F&P Setup

Thu, 05/28/2015 - 16:01
No Damon... I think the testing and accuracy tests are wildy erratic.... but the only test that counts is the loss of mains  (LOM) test on page 6... your last link.
Can't cut and paste the pdf very well at all, so here is the start of the LOM test figu...

Re: F&P Setup

Thu, 05/28/2015 - 14:09
Just found this, see section 9.3.2:

http://www.amps.org.uk/static/assets/downloads/DraftG5931_170914updatev1280115trackchangev4.pdf?attach

Quoteb. 47.5Hz – 51.5Hz  Disconnection by overfrequency or underfrequency protection is not permitted in this r...

Re: F&P Setup

Thu, 05/28/2015 - 14:04
Just picked a random G59/3 form from the Web:

http://www.westernpower.co.uk/docs/connections/Generation/G59-3-Generating-Plant-Protection-Commissioning-Fo.aspx

Look at the asymmetry in the frequency tests there.

Rgds

Damon

PS. The earth.org.uk site is ...

Re: F&P Setup

Thu, 05/28/2015 - 13:45
Damon...
" The limits on the 50Hz-nominal UK grid frequency are:

    Operational +/- 0.2Hz
    Statutory +/- 0.5Hz (1%)
    Maximum drop from an Infrequent Infeed Loss Risk (1320MW) is -0.8Hz

Also, your author states
"There will naturally be some 'wig...

Re: F&P Setup

Thu, 05/28/2015 - 10:19
dnx71, its drops in the bucket if the voltage rise from backfeeding the grid is less than 1% (which it should be, at the breaker box)

Re: F&P Setup

Thu, 05/28/2015 - 08:58
OZ;
First and Foremost, thanks for the very informative post!!
I think I'm going back to being a doorman  .

@bart;
Good eye!!
I'm told they do actually have a DC rating, but they haven't answered "what" the DC rating on that disconnect is. DE-rating...

diy hot water storage tank with geyser heat pump water heater

Thu, 05/28/2015 - 08:15
Hi

i have a geyser heat pump water heater which does a great job but my 19 year old water heat ( that was only used for hot water storage ) has rusted up and leaking so i am thinking of making a wooden water storage tank kinda like this tank but hold a...

Re: F&P Setup

Thu, 05/28/2015 - 08:07
joestue I was thinking about the US split phase 240 being an issue. If you grid-tie a home here through a commercial vendor, they backfeed 240 at the panel. The service for the home is split, though. The transformer on the pole is center-tapped ...

Re: F&P Setup

Thu, 05/28/2015 - 05:24
@oztules

Just FYI, and hoping that I have my facts right, here in the UK for grid tie (G83 and G59) the inverters do have to drop off at about 50.5Hz on the high side, but I believe that they are meant to hold on like grim death all the way down to 47H...

Re: PowerJack 2400w smart solar controller DC12V/24V, MPPT,100AMP

Thu, 05/28/2015 - 03:02
For the $100 I'd give it a try if you can't build your own.

Some of their stuff is actually amazing value, and some is ..... err... very sad......

If you want a truly powerful inverter, then their 15kw LF cards ( set for about $300 usd) just needs a ma...

Re: PowerJack 2400w smart solar controller DC12V/24V, MPPT,100AMP

Wed, 05/27/2015 - 18:26
I doubt anyone here has bought one yet, or they would probably have posted an article about it.

I do want to make one point clear: it is possible to build what is advertised there, for that price.
I know this because I know how much a well known 3Kw 48...

Re: F&P Setup

Wed, 05/27/2015 - 18:18
Quote from: dnix71 on May 27, 2015, 05:22:59 PMWould you get much benefit from that or would your appliances simply see a higher voltage when running and use more power and burn out faster.

far as i know the nec ...

Re: F&P Setup

Wed, 05/27/2015 - 17:22
What is the practical effect of backfeeding the grid from a branch circuit, assuming the branch circuit is capable of handling the current? These are not plugged into the point of service, just whatever outlet happens to be handy. To push back requires...

Re: F&P Setup

Wed, 05/27/2015 - 15:50
About the video.
  I'm pretty sure those disconnects don't have a DC rating. Yes, you could use one, but....
MWS has started radio advertising in Springfield.

Re: F&P Setup

Wed, 05/27/2015 - 15:40
Safety is fine to worry about Bruce, but needs to be for the right reasons.

These little units will fail fairly early on due to cap failure. They are subjected to unrealistic ripple, with the barest amount of capacity and bulk... consequently, the firs...

PowerJack 2400w smart solar controller DC12V/24V, MPPT,100AMP

Wed, 05/27/2015 - 15:30
Has anyone try the new power jack mppt charge controller.
Here is the specs: 2400w smart solar controller DC12V/24V, MPPT,100AMP.
I see it on ebay selling for just $99.99 that is so cheap for a good mppt charge controller. I am wondering if its a good ...