Please check my simple off-grid plan

[timselectric]

For inverters

ASI NDB1-125C125-2, Miniature Circuit Breaker,DIN Rail Mount High Current Circuit Breaker, 125A, 2 Pole, 240Vac, 60 Vdc, C Trip Curve https://a.co/d/ivh9oZ9

For batteries

DC Miniature Circuit Breaker, 2 Pole 500V 125 Amp Isolator for Solar PV System, Thermal Magnetic Trip, DIN Rail Mount, Chtaixi DC Disconnect Switch C125 https://a.co/d/3C0AYws

For AC

smseace Miniature Circuit Breaker Low Voltage AC 25A 400V 2 Poles DIN Rail Installation DZ47-63 C25 https://a.co/d/3w45XTu

For solar disconnect

DC Miniature Circuit Breaker, 2 Pole 1000V 63 Amp Isolator for Solar PV System, Thermal Magnetic Trip, DIN Rail Mount, Chtaixi DC Disconnect Switch C63 https://a.co/d/bJWuvVJ

 

[solitarysecluded]

For inverters

ASI NDB1-125C125-2, Miniature Circuit Breaker,DIN Rail Mount High Current Circuit Breaker, 125A, 2 Pole, 240Vac, 60 Vdc, C Trip Curve https://a.co/d/ivh9oZ9

Thanks for sharing. Now I got confused.. I've seen many guys here use minimum 200A?

For AC

smseace Miniature Circuit Breaker Low Voltage AC 25A 400V 2 Poles DIN Rail Installation DZ47-63 C25 https://a.co/d/3w45XTu

25A breaker straight from inverter AC output? you on 240V system right? or split phase?

 

[rodrick]

All breakers, and no fuses in my system.
I always prefer breakers over fuses. They are double duty. (Protection and disconnect) And prefer to reset rather than replace. (At a cost)

On the ac side I agree the dc side is the problematic area dc arc is hard to break and i don’t trust the breakers as a only fail safe I’ve always been a belt and suspenders type of guy

 

[timselectric]

Thanks for sharing. Now I got confused.. I've seen many guys here use minimum 200A?

These inverters max continuous draw is 104a.
Could surge to 150a for a second or two.
The trip curve on the breaker I chose IMO is perfect.

25A breaker straight from inverter AC output?

Yes, off grid setup.
No grid connected to AC in.
Continuous output of inverter alone is 21.7a

you on 240V system right? or split phase?

Actually both.
The inverters produce a 240v single phase system.
Then a transformer creates a 240v/ 120v split-phase system.

 

[timselectric]

On the ac side I agree the dc side is the problematic area dc arc is hard to break and i don’t trust the breakers as a only fail safe I’ve always been a belt and suspenders type of guy

I have no problem trusting quality equipment.
But, I also agree that redundancy is beneficial.
I used to be a belt and suspenders kind of guy. But in my old age, I tend to spend more time in just boxers. lol

 

[rodrick]

I have no problem trusting quality equipment.
But, I also agree that redundancy is beneficial.
I used to be a belt and suspenders kind of guy. But in my old age, I tend to spend more time in just boxers. lol

???

 

[solitarysecluded]

These inverters max continuous draw is 104a.
Could surge to 150a for a second or two.
The trip curve on the breaker I chose IMO is perfect.

I see. So a 150A breaker is better than 200A because it will "trip" easier for our type inverters.

Yes, off grid setup.
No grid connected to AC in.
Continuous output of inverter alone is 21.7a

Just a single 25A breaker output with extension power cord to distribute to all 240V appliances, water heater etc?

Actually both.
The inverters produce a 240v single phase system.
Then a transformer creates a 240v/ 120v split-phase system.

Ok mine setup without 120V split phase. Not sure how to set the load center box.
It is safe to put all AC and DC breakers next to each other? no electric arc?

 

[timselectric]

I see. So a 150A breaker is better than 200A because it will "trip" easier for our type inverters.

It would be a better fit, yes.
I chose 125a, because it will handle the 150a surge.
It's good to know the trip curve of a breaker.
The higher the amperage, the less grace period before it trips.

 

[timselectric]

Just a single 25A breaker output with extension power cord to distribute to all 240V appliances, water heater etc?

A two pole breaker, feeding into a loads panel.

 

[timselectric]

It is safe to put all AC and DC breakers next to each other? no electric arc?

I assume that you are referring to a box similar to a consumer unit. If so, that would be fine.
I'm doing it for each of my AIO's.

 

[solitarysecluded]

It would be a better fit, yes.
I chose 125a, because it will handle the 150a surge.
It's good to know the trip curve of a breaker.
The higher the amperage, the less grace period before it trips.

Got it. It doesn't matter even the battery banks reached 600-800A right?
Noticed some folks here has breaking cap rated 10k-25k in case of surge from large battery banks.

 

[solitarysecluded]

A two pole breaker, feeding into a loads panel.

Thanks tim. Would you mind to PM me share some picture of load panel?
Your setup is exactly what I'm looking for. Much appreciated.

 

[timselectric]

Got it. It doesn't matter even the battery banks reached 600-800A right?
Noticed some folks here has breaking cap rated 10k-25k in case of surge from large battery banks.

A battery will only output what is drawn by the loads.
Except in the case of a dead short. Then it will dump everything it can.

 

[solitarysecluded]

A battery will only output what is drawn by the loads.
Except in the case of a dead short. Then it will dump everything it can.

Make sense. Do you use SPD or combiner box for panels to inverter?
I'm plan to use this 32A 1200V but most people pointed out 25A is sufficient? and noticed you use 63A?

 

[timselectric]

SPD, yes.
Combiner box, never.
Breaker is just being used as a disconnect. Anything will work as long as it is rated higher than what is going through it.