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Jun 4, 2014
Samotage_300_medium samotage 591 posts

Topic: The Open Grid / Determining my Hydro Costs

At the moment, there hasn't been any code written for this.

Sam, @samotage

 
Jun 3, 2014
Volt_plug_medium rnoble 6 posts

Topic: Brultech / Cumulative pulse data

Figured it out. Below is what I'm doing for future reference...

I'm using a GEM/DashBox with a water meter and have been able to display Gallons/half hour (All Stacked Up Gadget)Gallons/day (Daily Summaries From The Last Month Gadget)Gallons/month (Over The Year Gadget) & Overall Consumption (My Energy, Stacked Up Gadget). The Dasbox reports incremental usage (gallons), just like energy is reported (kWh).

 
Jun 3, 2014
Volt_plug_medium rnoble 6 posts

Topic: The Open Grid / Water consumption

I'm using a GEM/DashBox with a water meter and have been able to display Gallons/half hour (All Stacked Up Gadget), Gallons/day (Daily Summaries From The Last Month Gadget), Gallons/month (Over The Year Gadget) & Overall Consumption (My Energy, Stacked Up Gadget). The Dasbox reports incremental usage (gallons), just like energy is reported (kWh).

 
Jun 3, 2014
Volt_plug_medium rnoble 6 posts

Topic: The Open Grid / Determining my Hydro Costs

I'm also very interested in the TOU/Tiered pricing options.

 
Jun 3, 2014
Volt_plug_medium rnoble 6 posts

Topic: Brultech / Cumulative pulse data

I recently installed a water meter and have it connected to my GEM and my DB is sending data to SEG. I was hoping to get cumulative data so I know when I need to change my water filters, but DB just gets individual pulse counts between readings and forwards on the actual consumption between readings to SEG. Is there anyway to get cumulative data?

 
Jun 3, 2014
Samotage_300_medium samotage 591 posts

Topic: Renewable Energy / Anybody using Enphase?

Interesting... I see from the interwebs a shaded cell will increase the resistance of the shaded cell, causing the string to loose efficiency.

http://www.solarpower2day.net/solar-cells/efficiency/

I suppose I've learnt something!

Sam, @samotage

always finding out new stuff.

 

 
Jun 2, 2014
Tony1_medium tnakelsk 137 posts

Topic: Renewable Energy / Anybody using Enphase?

As sandee pointed out inverter on panel is great with shading issues. In a typical DC array which can have multiple panels  per array, shadowing which can effect a couple of panels during the course of the day can drag the entire array down. Think of it as water in separate buckets interconnected, if one bucket loses some water the natural effect is for the other buckets to divert some of the water from the other buckets to attempt to level off the low bucket. As with water, electric basically does the same. The panel that is having shading issues will draw electric to it which brings down the efficiency of the total array. Another benefits of inverter on panel is the wiring bring AC of the roof requires less copper, the otheris the overall stress on the inverters. With large invertors you will eventually end up replacing them before the end of life of the panels. I installed sunpower panels with sunpowers inverter on panel which carries a 25 year warranty on both the panel and micro inverter. Yes this is a prorate warranty but a micro inverter runs a couple of hundred dollars each.   

 

Tony   

 
Jun 2, 2014
Samotage_300_medium samotage 591 posts

Topic: Renewable Energy / Anybody using Enphase?

Any modern web site has sunk cash - an oft overlooked fact of life ;)

Sam, @samotage

 
Jun 1, 2014
Fb_profile_wires_medium sandeen 35 posts

Topic: Renewable Energy / Anybody using Enphase?

SEG has sunk cash eh? ;)  Maybe you should go the donation route like pvoutput.org does?

Or combine forces, and take over the world from .au.  ;)

 
Jun 1, 2014
Fb_profile_wires_medium sandeen 35 posts

Topic: Renewable Energy / Anybody using Enphase?

Per-panel inverters have their advantages; panels operate independently so it's good if you have shading issues (or if you lose a panel).  And there's no DC string calculation, and no high voltage DC on the roof - it's just an AC branch circuit.

I chose Enphase in large part for the cool data I could see for my system, but that's slowly disappearing...

 
Jun 1, 2014
Samotage_300_medium samotage 591 posts

Topic: Smart Energy - In the home / Has anyone built an in-home display for SEG dashboards?

I've been using the cheap 7 inch tablets for years, and they work ok. They do have the propensity to crash... However they are cheap!

This is why the widgets were created, they enable you to show your dashboard in a cut down format suitable for the display.

To get the link, edit your dashboard, and there will be some pointers there.

This is one of my early 2.2 android displays

http://smartenergygroups.com/samotage/posts/139-On-Your-Bike-

Sam, @samotage

 
Jun 1, 2014
Samotage_300_medium samotage 591 posts

Topic: Comments and Suggestions / What's up with my stats widget?

It is a trade off between simplicity and complexity.  A lot is done behind the scenes to make the system easy to use, without having to need endless forms and configuration pages...  However a by product is little interesting things like this.

Sam, @samotage

 
Jun 1, 2014
Samotage_300_medium samotage 591 posts

Topic: Renewable Energy / Anybody using Enphase?

oh, icicicic.

Beats me why they would want the complexity of per panel invertors...

They likely have investors and a bunch of sunk cash (like seg...) and somebody is demanding a return.

Sam, @samotage

 
Jun 1, 2014
Fb_profile_wires_medium sandeen 35 posts

Topic: Comments and Suggestions / What's up with my stats widget?

Ok, that's non-obvious, but thanks! :)

 
Jun 1, 2014
Fb_profile_wires_medium sandeen 35 posts

Topic: Renewable Energy / Anybody using Enphase?

Not sure I understand the question...

Enphase has individual inverters under each panel, and they send data over the powerline to a box which collects it and sends it back to Enphase, then (for some people, or if you pay enough), shows you per-panel data.

However, the API has never show anything but cumulative power on 5 minute intervals - i.e. the same thing you'd get from a bog-standard energy monitor.  And how they'd like you to pay extra for that if you query it too often...

 
Jun 1, 2014
Samotage_300_medium samotage 591 posts

Topic: Comments and Suggestions / What's up with my stats widget?

There is a reason for this, your computer circuits don't have all the statistics.  They are created automatically as required by gadgets.

A couple of hints

- Include the stream in the watts on, even for just one display of this gadget.  this will add just about all the stats.

- Link the stream to the statistics bar chart, this will create new stats as one is selected.

Note, depending on your history, once a stat is created it needs to be calcualted, this may take a little while depending on your data history.

Sam, @samotage

 
Jun 1, 2014
Samotage_300_medium samotage 591 posts

Topic: Renewable Energy / Anybody using Enphase?

I wonder how they would do per panel power?  Do they have DC sensors on each panel in the string?

Sam, @samotage

 
Jun 1, 2014
Fb_profile_wires_medium sandeen 35 posts

Topic: Smart Energy - In the home / Has anyone built an in-home display for SEG dashboards?

I was considering using a cheap Android tablet (low power, I hope!) to show SEG dashboards as an in-home energy display.  Is anyone doing anything like this?

It'd be cool to be able to rotate across several dashboards, although I suppose I could do that client-side...

 
Jun 1, 2014
Fb_profile_wires_medium sandeen 35 posts

Topic: Renewable Energy / Anybody using Enphase?

Unfortunately Enphase recently started charging extra for all but the most limited access to their API.  Boo, hiss.

At this point I'd suggest something like a SEGMeter or Brultech and just take control of your own data...

 
Jun 1, 2014
Fb_profile_wires_medium sandeen 35 posts

Topic: Comments and Suggestions / What's up with my stats widget?

Any idea why my "computer" circuit stats widget shows me less info than the other two (i.e no average, no load factor?)

((as an aside, not happy that my new Energy Star fridge uses more than my two old (small) fridges combined, 94W avg, grr!))

my stats widgets

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