Not a code issue just follow 710.15(C):
(C) Single 120-Volt Supply
Stand-alone and
isolated microgrid systems shall be permitted to supply 120 volts to single-phase, 3-
wire, 120/240-volt
service equipment or distribution panels where there are no 240-volt
outlets and where there are no
multiwire branch circuits. In all installations, the sum of the ratings of the power sources shall be less than the rating of the neutral bus in the
service equipment. This
equipment shall be marked with the following words or equivalent:
WARNING:
The warning sign(s) or label(s) shall comply with
110.21(B).
So yes?
Just use a Power Distribution Block or Polaris or ? to be able to wire the hot to both of the 120 legs on the load center?
side note
@pvgirl love your profile stuff
.
another side note: Was struggling with googling a "Power Distribution Block" for 4/0 dual meter (revenue and export) system. Found an amazing post here and
@pvgirl is on that one too
.
I've read no so great stories about using Polaris connectors about how they loosen up over time. I have a manual transfer switch and I need a 3 pole tap. Watching Engineer775 Youtube videos, he has been using some nice distribution blocks. I believe they are Mersen: I've seen distribution...
diysolarforum.com
Inverters can fail, so if grid or generator is also available, plan for a bypass mechanism.
This could mean feeding both L1 and L2 through a 2-pole breaker, with inverter feeding both poles of breaker. The breaker can be interlocked with another breaker from the other source allowing 120/240V if available. Or that one can feed just 120V if desired.
This is a rabit hole that I'm actually pretty excited about. I'm just wrapping up my Sol Ark 15k install at home. $10k I paid for my sol ark.
Now of course there is the 18k from EG4 $5k
Using my head, my education, my experience, google and this form < $1000
So real numbers.
Solar Start: $4,602 is what you could buy to get started with solar, your power bill will go down.
Next Add backup: $2,700 this is the 120v system for critical loads you could buy with the savings from solar start
Next Add generator: $850 this is the 120v system backup you could use for when it's dark / your battery is too small
The generator, 48v batteries and 120v all in one could be swiped for camping / portable power needs / save a friends life.
To get more power just parallel stuff. To get 240v split phase start w/ 2 EG4 units.
Diagram and cost estimates attached. Sorry a little messy, I really gotta get back to work. I just really appreciate you guys on the form answering so I took the crazy in my head and put it on paper.