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Parallel EG4 6000XPs>>> Poor mans Grid assist??

ScrotpusGobbleBottom

ScrotpusGobbleBottom

Corn Pop was a bad dude.
Joined
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Ok, So I have purchased a second 6000xp.

I plan on only one being connected to grid for the foreseeable future as I am out of breakers on the main panel.

Would there be any issues with 2 6000xps on the same battery bank but only one connected to grid?
I understand that my pass thu would be only 6000 watts.

If one is on grid and one is on battery wouldnt that be a grid assist function??
Would they not share the load equally after the on grid eod is passed but before end of discharge?
 
Last edited:
Might be a problem. When the 6000xp shifts to grid, the shuts off the inverter and starts charging the battery. Put them in parallel, and both inverters shut down (do the same thing).

I don't think you can have two inverters, not in parallel, providing power to the same load. How does each inverter know how much power to provide?
 
zanydroid said:
Out of breakers => install one 100A breaker in that panel, feed a new subpanel with two 50A or 60A breakers, then feed the two 6000XP
Click to expand...
Good idea. I didnt think of that.
I only have 100 amp service tho lol
Probably ok if I run everything thru the 2 6000xps
 
zanydroid said:
Somebody posted a parallel 2x stacked 6000XP wiring diagram the other day, that looked decent. Not sure if there is one in the manual.
Click to expand...
Yes, I see that now.
Im just still wondering what happens when a parallel set of 6000xp has grid only on one while battery and voltage falls below on battery EOD.
 
PotusGobbleBottom said:
Im just still wondering what happens when a parallel set of 6000xp has grid only on one while battery and voltage falls below on battery EOD.
Click to expand...
Assuming the grid on the Master, my guess: while on battery and pv, it ignores the grid/gen line.

When overload, pv/battery not adequate, etc, the Master will command both M and S to switch to grid (and charge battery if set to do so).

Two possibilities at that point:
1) slave sees power because of grid power on load port; or
2) slave does not see power on grid port, and faults.

possibility 1: limited to grid power that one 6000xp can pass.

Possibility 2: may or may not affect Master. Still limited to passthrough. May wait to see stable power on grid/gen port (gen start command) before switching. One will see the power, one won't. Could be that only the Master checks.

Neither possibility will "assist the grid".
 
I would expect it to error and shutdown.
Because it doesn't see the input on the second unit.
When paralleled, they function as one.
 
Thanks for your responses everyone. I took the message clearly.

Today I disconnected my water heater from grid for good!
I installed 2- 1500 watt elements in it to be nice to the inverter and work perfect with my other loads at least until the other 6000xp is set up.

Now I have an open breaker on my panel!
I wonder when my 2nd 6000xp will be here. Ordered from Signature Solar and its supposedly "on preorder" ?

Anyone have any thoughts on replacing the 4500 watt elements with 1500 watt elements?
Obviously the recovery time will be bad. Perhaps quite a bit less efficient?
Anything else?
 
ScropusGobbleBottom said:
Thanks for your responses everyone. I took the message clearly.

Today I disconnected my water heater from grid for good!
I installed 2- 1500 watt elements in it to be nice to the inverter and work perfect with my other loads at least until the other 6000xp is set up.

Now I have an open breaker on my panel!
I wonder when my 2nd 6000xp will be here. Ordered from Signature Solar and its supposedly "on preorder" ?

Anyone have any thoughts on replacing the 4500 watt elements with 1500 watt elements?
Obviously the recovery time will be bad. Perhaps quite a bit less efficient?
Anything else?
Click to expand...
I added a second water heater in front of my existing one, disconnected the top element and replaced the lower element with a 1500W unit. This is actuated only when the battery SOC is >70% …. And acts as a cheap place to dump excess energy. Cheaper than another battery.

A lower wattage element is not less efficient … just (much) slower.
 
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