How far is too far for the inverter?

ISR 10.0 is shut down voltage.

brulaz wrote:
I wish. My cheap Canadian Tire 1000W PSW starts screaming at ~11.5V. Still works though. Not sure how low the V has to be for it to cut off.

brulaz wrote:

JRRNeiklot wrote:
Forgive my ignorance. I was calling 2/0 2 gauge. I'm no electrician, so my terminology is faulty. Upon further review, though, it's actually 1/0.

1/0 aka 0 ga will be safe and not that much voltage drop with 150A.
But with just 2 6V golf carts you will get substantial V drop at the batteries if/when drawing 150A for your microwave. Not sure how your inverter will handle that.

Big downside of 6v GC batteries is high internal resistance, not good on high amp loads. As an example, myself and a few others have found that a pair of GC will usually only run a 100A or so load down to about 80 percent state of charge before causing the inveter to drop out due to low voltage.

I have 4 golf carts and can run the microwave even at 50 percent state of charge, each bank only needs to supply about 50 amps in that case.

Now 12V are another story, usually way less internal resistance and can run the load down to much lower state of charge.

JRRNeiklot wrote:
Forgive my ignorance. I was calling 2/0 2 gauge. I'm no electrician, so my terminology is faulty. Upon further review, though, it's actually 1/0.

1/0 aka 0 ga will be safe and not that much voltage drop with 150A.
But with just 2 6V golf carts you will get substantial V drop at the batteries if/when drawing 150A for your microwave. Not sure how your inverter will handle that.

Forgive my ignorance. I was calling 2/0 2 gauge. I'm no electrician, so my terminology is faulty. Upon further review, though, it's actually 1/0.

3000w? No possible way the instructions called for #2 wire. Or is that doubled up?
2/0 minimum, I recommend 4/0.

http://www.genuinedealz.com/custom-cables?size=46

pianotuna wrote:
Hi,

How many watts is the inverter?

3000 watts, 4000 watts peak.

BFL13 wrote:




Also how big is the battery bank and battery type for how low an SOC can it be down to before the loaded voltage hits the 11v inverter alarm set point?

Then pick how low you might be down to when you want to run the appliance. My own requirement is to be able to run the toaster for early breakfast when the batteries are down to 50% and due to be recharged later that day.

Your inverter to battery distance is easily doable with the right set-up, so the distance itself is not an issue.

Two 6 volt Trojan J185H-AC 390 AH batteries. The only reason for the large inverter is for the microwave, which will run maybe 5 minutes a day.

brulaz wrote:

BFL13 wrote:

...
Also how big is the battery bank and battery type for how low an SOC can it be down to before the loaded voltage hits the 11v inverter alarm set point?
...

I wish. My cheap Canadian Tire 1000W PSW starts screaming at ~11.5V. Still works though. Not sure how low the V has to be for it to cut off.

I had one of those for a few years till I fried it (RIP) and it didn't act like that. It is a re-branded Xantrex if that matters.

It might be a question of where you take that 11.5 measurement from. You can get voltage drop on the monitor to battery wire itself. Plus you can get "rounding error" with only one decimal point.

Might be worth some cross-checking with different voltmeters at the battery, at the inverter input, and with the inverter's own readout.

If it is really closer to 11 than the now observed 11.5, you can then go about reducing voltage drop.

BFL13 wrote:

...
Also how big is the battery bank and battery type for how low an SOC can it be down to before the loaded voltage hits the 11v inverter alarm set point?
...

I wish. My cheap Canadian Tire 1000W PSW starts screaming at ~11.5V. Still works though. Not sure how low the V has to be for it to cut off.

I assume you are following the installation manual.... so yes the wire is fine.

I have a 2800w factory installed invertor on my class A which is around 10 feet from my battery bank.