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EG4 Hybrid Mini Split 12k/24k - Wiring Question

HighCountry

HighCountry

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I would like to install the EG4 Hybrid Mini Split 12k (considering 24K) and see that solar can be directly connected to the unit.

My question: Is it at all possible to use existing solar running to EG4 6000XP inverter to power the mini split? In essence, shared solar for both the EG4 6000XP and the EG4 Hybrid Mini Split. If so, how would something like that be wired up? In other words, does the hybrid mini split need it's own dedicated solar panels? The setup is completely off-grid and will never be tied to the grid.
 
Last edited:
Yes, those units need dedicated solar panels for the solar input. BUT, you could connect the grid input to an output of you battery inverter to run the unit at night or when solar isn't enough to keep the unit running.
 
Q-Dog said:
Yes, those units need dedicated solar panels for the solar input. BUT, you could connect the grid input to an output of you battery inverter to run the unit at night or when solar isn't enough to keep the unit running.
Click to expand...
Unit will already be connected to inverter through breaker panel...
 
Running mini split from the inverter/batteries does not seem to be very efficient since the power originals at solar panels, goes to the inverter, then to the batteries then to the inverter then to mini split... Getting a regular mini split does not really help the situation. I would like to figure out a way to utilize the current solar panels without having to add more.
 
HighCountry said:
Running mini split from the inverter/batteries does not seem to be very efficient since the power originals at solar panels, goes to the inverter, then to the batteries then to the inverter then to mini split... Getting a regular mini split does not really help the situation. I would like to figure out a way to utilize the current solar panels without having to add more.
Click to expand...
By the time you get done installing some type of transfer switch rated for the application I just don't see how it makes sense.
There was a thread somewhere where a member used dual DC rated breakers to flip flop arrays, I can't find it.
 
You need to figure out if you have the battery capacity to run existing house loads plus the A/C, and if the batteries can handle the amperage draw you could get if the inverter and A/C happen to pull full load at the same time. That is just simple math.

Unless the present system is severely oversized, you may need to add more battery and solar to cover the additional load.
 
Q-Dog said:
You need to figure out if you have the battery capacity to run existing house loads plus the A/C, and if the batteries can handle the amperage draw you could get if the inverter and A/C happen to pull full load at the same time. That is just simple math.

Unless the present system is severely oversized, you may need to add more battery and solar to cover the additional load.
Click to expand...

Have (3) EG4 LL-3 48V batteries and EG4 6000XP. Completely off-grid...
 
Frankly, I would like to figure out how to run the EG4 Hybrid on the current solar array without a separate set of panels becasue I already have the EG4 mini split! I do have a few extra 395W panels to hookup directly up but was saving those for a rainy day - another project.
 
HighCountry said:
Frankly, I would like to figure out how to run the EG4 Hybrid on the current solar array without a separate set of panels becasue I already have the EG4 mini split! I do have a few extra 395W panels to hookup directly up but was saving those for a rainy day - another project.
Click to expand...
The original sin of this is that separate MPPTs inherently cannot coexist on the same DC string because the overall voltage / current drawn from the string need to be coordinated

You’ll be fighting an uphill battle with electrical Engineering and against the people here not interested in helping bc of this battle.
 
HighCountry said:
Frankly, I would like to figure out how to run the EG4 Hybrid on the current solar array without a separate set of panels becasue I already have the EG4 mini split! I do have a few extra 395W panels to hookup directly up but was saving those for a rainy day - another project.
Click to expand...
Just run AC power from your circuit panel to the AC in of the EG4 and ignore the solar inputs. Then one day when you get tired of tripping over those extra panels that you already own, you hook up a few to the solar inputs and nothing else has to change. What "wastes" more potential power, panels that only run the air conditioner, or panels that sit in a shed collecting dust?
 
HighCountry said:
Frankly, I would like to figure out how to run the EG4 Hybrid on the current solar array without a separate set of panels becasue I already have the EG4 mini split! I do have a few extra 395W panels to hookup directly up but was saving those for a rainy day - another project.
Click to expand...
Solar panels are cheap compared to batteries, if you have unobstructed space for panels size accordingly and and you can run basically free all day and just use your batteries at night.
 
The basic answer is yes you can run multiple devices from one set of solar panels but you must switch the panels between said devices, Tim's KISS example is a perfect analogy, otherwise the electronics will fight each other.
 
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