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EG4 12K Hybrid mini split solar question

Varbar

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Joined
Jul 27, 2023
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2
Location
San Antonio
I have installed the EG4 Hybrid mini split with 1000 watts of solar and I am only usually get about 380 watts reading on the device. I have 5 - 200 watt 12v solar panels 5 amp wired in series. Should I wire it differently. I assumed I would need more solar to run it all by solar but I have only seen it get over 400 watt one time. I live in San Antonio TX so we have a lot of sun.
 
This is a concept most people don't "get" at first (including me, when I first installed my system). If you don't have some place for the power to "go" - loads such as your mini split, or batteries that need to be recharged - your panels just won't produce it.

Example: I installed panels that would produce 1260 watts max in a small system, and started started with a 100AH battery that I had fully charged before I installed it. When I turned the system on I was only seeing about 100 watts produced by the solar (because that's all the load that I had running). I thought something was wrong, and started checking everything (which looked fine). I ended up plugging in an electric heater, and saw the solar production soar. A cloud came over and the solar production dropped dramatically, but the heater kept running as the inverter used the battery power. The cloud went away, and the solar production soared again. I unplugged the heater and the solar production remained high for a while, until the battery was recharged, and then it dropped again, despite being in full sun. And then it dawned on me, that this was a feature, not a bug. Solar production occurs only when there's a need for it, either loads to be immediately used, or batteries to be recharged for later power.

Right now, my 1260 watt system is producing only about 550 watts despite being in full sun. There's about 30 watts of constant load from the inverter and related equipment, and about 350 watts from a small air conditioner, and the rest is being used by other loads and a little bit of "topping off" current into the batteries. When I turn on my computer monitors it'll go up a bit, and if I plug in a vacuum cleaner it'll soar. But otherwise, only 550 watts is all that's needed, so that's all it will produce, despite being capable of much more. Rather elegant and a bit of a life lesson in there somewhere, when you think about it.
 
This is a concept most people don't "get" at first (including me, when I first installed my system). If you don't have some place for the power to "go" - loads such as your mini split, or batteries that need to be recharged - your panels just won't produce it.

Example: I installed panels that would produce 1260 watts max in a small system, and started started with a 100AH battery that I had fully charged before I installed it. When I turned the system on I was only seeing about 100 watts produced by the solar (because that's all the load that I had running). I thought something was wrong, and started checking everything (which looked fine). I ended up plugging in an electric heater, and saw the solar production soar. A cloud came over and the solar production dropped dramatically, but the heater kept running as the inverter used the battery power. The cloud went away, and the solar production soared again. I unplugged the heater and the solar production remained high for a while, until the battery was recharged, and then it dropped again, despite being in full sun. And then it dawned on me, that this was a feature, not a bug. Solar production occurs only when there's a need for it, either loads to be immediately used, or batteries to be recharged for later power.

Right now, my 1260 watt system is producing only about 550 watts despite being in full sun. There's about 30 watts of constant load from the inverter and related equipment, and about 350 watts from a small air conditioner, and the rest is being used by other loads and a little bit of "topping off" current into the batteries. When I turn on my computer monitors it'll go up a bit, and if I plug in a vacuum cleaner it'll soar. But otherwise, only 550 watts is all that's needed, so that's all it will produce, despite being capable of much more. Rather elegant and a bit of a life lesson in there somewhere, when you think about it.
I understand what you are saying but shouldn't it show more than 380 watts of draw when the mini split is also consuming 600 wats of ac power. Full sun middle of the day. Thats why I thought maybe I wired something wrong. The panels are only 12v 200 watt. I realized after I purchased these maybe I should have went with bigger panels but I plan on installing the eco wothy sun tracker. Thanks for the feedback.
 
If you have five, 200 watt panels, they should be capable of producing 1,000 watts, with perhaps a bit of loss due to imperfect angle and tilt and losses through the solar charge controller. I can't speak to how EG4 has their systems designed to "source" power when both AC and solar are present, but if 600 watts of AC plus 380 watts of solar (980 total watts) are required, and your panels are unshaded, at a decent angle and tilt on a bright, sunny day, I agree that doesn't sound right as I would expect more solar production.

It almost sounds like 2 or 3 panels aren't producing anything, which is very surprising if you have these wired as 5 panels connected in series, as you describe. Could you please list out ALL the published specs of your panels, and perhaps a sketch of your wiring? That might help us help you. Something seems off based on your additional information here.
 
What is your open circuit voltage on the string? The Ac has a minimum input voltage of 90V DC. I would suspect this is your problem if you have 5 12v panels.Screenshot_20230720-205520_OneDrive.jpg
 
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I have installed the EG4 Hybrid mini split with 1000 watts of solar and I am only usually get about 380 watts reading on the device. I have 5 - 200 watt 12v solar panels 5 amp wired in series. Should I wire it differently. I assumed I would need more solar to run it all by solar but I have only seen it get over 400 watt one time. I live in San Antonio TX so we have a lot of sun.
Hi; I'm near New Braunfels just ordered the EG4 Hybrid mini split. I'd like to compare notes if you are willing. Do you have all of your panels on the same side of the roof?
 
I have installed the EG4 Hybrid mini split with 1000 watts of solar and I am only usually get about 380 watts reading on the device. I have 5 - 200 watt 12v solar panels 5 amp wired in series. Should I wire it differently. I assumed I would need more solar to run it all by solar but I have only seen it get over 400 watt one time. I live in San Antonio TX so we have a lot of sun.
5 -12 volt panels are only going to give you 60 volts if my math is correct....the mini splits call for a minimum of 90 volts..........I think you may need different panels. I am running seven used sharp 37 volt, 245 watt panels and have seen 1600 watts being used on my mini splits. San tan had these panels for around $50 each.
 
What is your open circuit voltage on the string? The Ac has a minimum input voltage of 90V DC. I would suspect this is your problem if you have 5 12v panels.View attachment 159950
Great Info! Thank you. I would have missed this fact. I almost pushed the button on buying more panels For my own install. now I know what to look for.

I don’t think he needs different panels, but needs to add one more to get him over 90. 5 panel max is like 80.
panels are usually more like 16/17volts. Not 12volts. Recheck your sticker on the back.
 
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can you 'share' a string of panels between two of these units or does each have to have it's own? I am planning to have 3 of these in different rooms but we will only be one room at a time and the others will be turned down (up?).
 
can you 'share' a string of panels between two of these units or does each have to have it's own? I am planning to have 3 of these in different rooms but we will only be one room at a time and the others will be turned down (up?).
In my opinion you'd be better of purchasing Pioneer, Senville or any of the other countless mini splits that are available then add an AIO inverter and wire your panels to that along with the mini splits. You could probably do that cheaper than 3 of the eg4/deye solar mini splits, especially since you are considering 3.
You could also buy a split with multiple heads.
 
can you 'share' a string of panels between two of these units or does each have to have it's own? I am planning to have 3 of these in different rooms but we will only be one room at a time and the others will be turned down (up?).
Around 1200watts of solar power is the sweet spot for these to run. if you split that it’s not going to preform for you even if you could accomplish that. It would be like running one on Solar and the other on AC. If you doubled the Solar then you might as well just run them separate. So the short answer is no. You can’t do that.

you could always get the AC type for the ones you don’t run as much. Or just use your Central’s fan mode to spread it around your house. That implies that you already have central AC Or heat.
 
What is your open circuit voltage on the string? The Ac has a minimum input voltage of 90V DC. I would suspect this is your problem if you have 5 12v panels.
I am still procrastinating on my Solar Panel purchase.

Am I missing something? Should I be buying 24v panels for this EG4?
Does it make a difference if you just have more 12v panels or less 24v panels to get to 1200watts?

By the way. I watch your channel. Good stuff.
 
I am still procrastinating on my Solar Panel purchase.

Am I missing something? Should I be buying 24v panels for this EG4?
Does it make a difference if you just have more 12v panels or less 24v panels to get to 1200watts?

By the way. I watch your channel. Good stuff.
Just need to have over 90 volts.....easier to get their with less panels if the voltage is higher.......
 
Just need to have over 90 volts.....easier to get their with less panels if the voltage is higher.......
Thanks, I pushed the Button last night... Glad the post had me procrastinating. I found:

10 x Hyundai 300W Half-Cell Monofacial Solar Panel ( Silver ) | HiA-S300HG​

$1,095.00

On "Signature Solar" - Free shipping too. Even tho I had to buy 10,
I would have paid that for 5 - 200watts on Amazon. I read that they are not the most efficient Panels,
but even if I get 200watts out of them for 100 bucks a piece that's a fantastic deal.

If I don't find a use for the extras I'll get my Daughter to sell them on Facebook for $200 a piece! LOL. Still a deal.

I finally got up and running just on Grid Power. Too cool!
 

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Thanks, I pushed the Button last night... Glad the post had me procrastinating. I found:

10 x Hyundai 300W Half-Cell Monofacial Solar Panel ( Silver ) | HiA-S300HG​

$1,095.00

On "Signature Solar" - Free shipping too. Even tho I had to buy 10,
I would have paid that for 5 - 200watts on Amazon. I read that they are not the most efficient Panels,
but even if I get 200watts out of them for 100 bucks a piece that's a fantastic deal.

If I don't find a use for the extras I'll get my Daughter to sell them on Facebook for $200 a piece! LOL. Still a deal.

I finally got up and running just on Grid Power. Too cool!
Just make sure your cold weather voltage does not exceed what the mini split can handle......
 
Just make sure your cold weather voltage does not exceed what the mini split can handle......
It can take upto 380v. So no problem there if using 6 panels would be 240v. Well below max.

just looking at the spec sheet confuses me Tho.
says the PV amps can be upto 12A. But then it says rated current of Unit 9.1A ?
these panels are 9.77A. Strange. I may call them just to clarify.


Edit:

They said was all good. the 12K EG4 takes up to 12amps of Solar.
 

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