Intelligent inverter question

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vasir
vasir Registered Users Posts: 3 ✭
in Solar Beginners Corner #1

Hello, 


I am new  here and also when it comes to designing  a basic 3x 375 panel system which is used to support the energy needs of a simple greenhouse. 

What I have:

3 x 375W solar panels

1 x EPEVER MPPT Solar Charge Controller 40A 150V PV Solar Panel Controller 

3 x Weize 12V 100AH Deep Cycle AGM

 

Plus all the needed cables/fuses and so on.

 

Question:

Greenhouse has multiple fans and misters to maintain 75% humidity overall and Min temp of 65F and Max temp of 85F all using 120V. 

I want to have a system where when solar power is  available, it uses solar power. ( around 300 W max) 

When solar power is no longer viable it detects it and  switches  to house grid to continue to operate.

Basically I need an intelligent inverter that detects solar output and uses it and when solar is no longer available switched back to house normal power grid.

 

Any ideas how I can proceed?

 

 

Thank you.



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Comments

  • Ralph Day
    Ralph Day Solar Expert Posts: 1,019 ✭✭✭✭
    #2
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    Most modern inverters willl do that.  I have an Outback VFXR3648 (3600 watts output, 48volt battery source) that I run in High Battery Transfer HBX mode.  It will latch onto the grid when the battery voltage goes down to a setpoint you pick (eg 50vdc) and drop the grid when you get up to another setpoint you've picked (eg 53vdc).  This leaves the pv to charge, and when on the grid...like overnight...the grid will carry the loads.  If an non sunny period of time comes about, like winter, the inverter can be set to charge as well.
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  • vasir
    vasir Registered Users Posts: 3 ✭
    edited June 2022 #3
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    Thank you. This will give me a good starting point.
    Edit:   What do you think of this unit? Any other brands you think would be similar?

    https://www.amazon.com/dp/B08R3MSXTG

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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #4
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    Any issues to consider if/when the Grid goes down? 

    Will plants BBQ or just be sickly for a day ?    

    Do you need battery backup ?
    Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister ,

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  • vasir
    vasir Registered Users Posts: 3 ✭
    #5
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    If the Grid goes down .... well I will have someone else to blame :).  .... I think that the 2x100A batts will do the job for the night if power goes down. 

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  • m151
    m151 Registered Users Posts: 39 ✭✭
    #6
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    vasir said:
    Thank you. This will give me a good starting point.
    Edit:   What do you think of this unit? Any other brands you think would be similar?

    https://www.amazon.com/dp/B08R3MSXTG

    I would look at the similar Midnight DIY available from this site. The support and customer service should be much better.
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