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Looking for beta testers - Solar & House Power Analysis VD


AutoFrank

Question

Hi,

I'm creating a VD that captures both solar PV and house power consumption data and creates some information such as

  • PV contribution (last hour and day and possible week or month)
  • PV utilisation (last hour and day and possible week or month)
  • Total billed kWh
  • some others

 

The setup you will need as solar panels (of course :-) ) and 2 HEM Clamps (one on the solar output and one on the house input from utility grid)

 

VD sneak peak so far

Please login or register to see this attachment.

 

Let me know if you might be interested in helping me test before release

 

Thanks

_f

 

 

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I would be glad to help but I don't have any Solar-panels (yet)......

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This is a great little project @AutoFrank

 

Although I haven't got solar myself I constantly have requests to include this for others. So I will be following closely!!

 

 

What would be great is if the data could be pushed out to a third party software to create a graphical wall display with all of this data displayed perhaps with the weather overlaid as well to compare generation with weather conditions etc...

 

 

 

 

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  • 4 minutes ago, Robert Folbigg said:

    What would be great is if the data could be pushed out to a third party software to create a graphical wall display with all of this data displayed perhaps with the weather overlaid as well to compare generation with weather conditions etc..

     

    Thanks @Robert Folbigg

    I'm glad you're thinking small :-)

    Lets get the VD running and we could then figure out a way to push to some 3rd party service

     

     

    16 minutes ago, TRicky said:

    I would be glad to help but I don't have any Solar-panels (yet)......

     

    Thanks @TRicky

    It'll probably be another week so you better start shopping :-)

     

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    Well @AutoFrank,

     

    At least I already reserved some space in my garden for the PV panels.

    And I already have 2 Solar panels on my roof for my swimming pool but I'm just missing my pool so far :oops:

    Some strange planning I guess......

     

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  • 9 hours ago, TRicky said:

    Well @AutoFrank,

     

    At least I already reserved some space in my garden for the PV panels.

    And I already have 2 Solar panels on my roof for my swimming pool but I'm just missing my pool so far :oops:

    Some strange planning I guess......

     

    At least the intent is there :-)

     

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    Yup.. count me in. Have 34 panels with micro inverters (Australia), but can clamp at a couple of central locations for consumption & generation.
    Specific clamp required to get the data to HC2?  Happy to shop.

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  • 1 hour ago, jemichae said:

    Yup.. count me in. Have 34 panels with micro inverters (Australia), but can clamp at a couple of central locations for consumption & generation.
    Specific clamp required to get the data to HC2?  Happy to shop.

     

    Thanks @jemichae

    I'll add you to the list

    Micro invertors may be tricky unless you have one central breaker where all the AC from the panels converge. I have a single invertor and I clamp the AC side of the invertor. The clamps I'm using are Aeotec HEM Gen 5

     

    side question ...

    34 panels :-) - how much power can you generate ?

     

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    2 hours ago, AutoFrank said:

     

    Thanks @jemichae

    I'll add you to the list

    Micro invertors may be tricky unless you have one central breaker where all the AC from the panels converge. I have a single invertor and I clamp the AC side of the invertor. The clamps I'm using are Aeotec HEM Gen 5

     

    side question ...

    34 panels :-) - how much power can you generate ?

     

     

    This is me :)

    Please login or register to see this link.

    (just 260W panels... 300W is the norm for install now).

     

    Most generated in one day was a little over 63kW.. this time of year mid 20's, as we are in winter here and coming up to the shortest day of the year. Pump a fair bit back into the grid (for which we get paid per kW), but I mostly overspec'd my generation to be ready for batteries.... plus ensure I can generate a high enough peak to cover the aircon during summer (40+ Degrees C regularly).
    All the AC builds up on the roof and comes down a single cable into the meter.  I'm 3 phase here, but have clamped OK before when I was working out all my usage.
    My 'smart' meter only measure generation on the roof, not consumption by the house (unless I go out there the same time every night and write down the numbers)... so was looking for a solution without having to buy a whole new meter (Enphase S).  The Aeotec HEM will fit the bill, especially if I can leech a VD (and help test of course).  Cheers, James.

     

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    Hello, AutoFrank, 

     

    I have 12 solar panels with micro inventers and HEM 5Gen. For some time i have been working on measurement of used and produced energy. I though that 5Gen will measure negative energy. I have it made in a way that depend on the power produced by solar panels, the house appliances will turn on but i am not satisfied with it. Can I join into beta testing, please? 

     

    Sincerely, Pepko 

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  • 7 hours ago, pepko said:

    I though that 5Gen will measure negative energy

     

    Hi @pepko

    Yes, glad to have you on board

    I came across the same limitation so with the help of others we figured out that if you track the kwh of the gen 5 HEM (with p2=1) that is clamped on your feed into your house you can see when it goes up and down

    The theory which seems to be bourne out by experimentation so far is that any time the kwh goes up, you are pulling power from the utility grid and when the kwh goes down you are giving power back to the grid

    my vd just separates the two, tracks adn accumulates the differences and adds some more data to build up a dataset to derive some metrics

     

     

     

      

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    This is a nice project. I have 24 panels but i don't have power clamps. 

    I wil look into it to bay som clamps.

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    I've already got something similar running, except I'm reading my Smart Electricity instead of a second HEM. I'm not that interested in seeing how much the panels generate but I'm interested in what they generate related to what they should generate ;-) So I'm changing icon in the VD according to how much they generate and how much they should generate.

     

    I did try a HEM on the out/incoming energy but they can't register a negative energy flow (outgoing power), how do you solve that??

     

    I still have that second HEM, so I can test your VD. 

    Edited by emielstroeve
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    Hi,

     

    How is it this project, it's finish?

     

    I only have one HEM and Fronius Symo Hybrid. I get here a VD that can read how much energy is generated, so I think it's not necessary a second HEM. 

     

    When I am producing more energy than the one I am consuming my HEM has negative Amp readings and so it does not interest me to have an HEM ...
    Does anyone have a solution to this problem?

     

    Thanks

    Alex

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