lvx6048 overloading

sunshine_eggo said:

Electric motors have a 4-5X surge compared to run current.

If it's a 120V saw, the unit is limited to 3000W on either leg, and you're overloading the inverter at startup.

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Michf1r3f1ght3r said:

hello, my lvx6048 keeps erroring out with 07 code upon start up of just my table saw. nothing else on the solar power. 15kw of batteries fully charged.. no grid power. not tripping the 30a breaker in panel just the 07 error. any ideas? TIA.

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42OhmsPA said:

Agreed, mine didn't like unbalanced surge loads one bit when it was already loaded but at minimal loads it had no issues with the miter saw, table saw, or shop vac.


Do you have a clamp meter that can read inrush current?
Is there a data label on the saw motor you can see?

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Michf1r3f1ght3r said:

No don't have a clamp meter. Been wanting/needing to get one. Haven't looked for the data on motor.

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42OhmsPA said:

Did you try the other leg?
Battery cables are the proper gauge?

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Michf1r3f1ght3r said:

Yep tried both legs. Battery cables are correct also .

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Michf1r3f1ght3r said:

Saw is a newer delta 10" from Lowes. 120v 15a saw. System runs my dust collector fine. It beep when I first start it but it doesn't shut down..

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42OhmsPA said:

A clamp meter (that can read AC and DC inrush current) is definitely a useful tool in diagnosing problems. Sound look good justification to buy new tools to me...
Unless it's a massive saw something else seems to be wrong.

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Michf1r3f1ght3r said:

Thank you for responding. Think I'll upgrade the battery cables too a thicker gauge. And pick up a clamp meter. Lol

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sunshine_eggo said:

Let's say it's half that... 7.5A @ 120V.

5X 7.5A = 37.5A vs. 25A max. These units do not have a robust surge capability, and you have to remember, that at 120V, it's only a 3000W inverter.

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sunshine_eggo said:

I'm dubious given the error. It's not a DC ripple, low voltage, or other error, but specifically that you've exceeded 110% rated output for the max amount of time. Thicker cables won't hurt, but they may not be the solution.

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Michf1r3f1ght3r said:

Don't really understand all those numbers. Lol. Just figured it would run 1 table saw with nothing else on at the time... thank you for the response.

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sunshine_eggo said:

You said it's a 15A saw.

I said said let's say it only needs half of that, 7.5A

Surge current is 4-5X run current. Since I cut the current in half, I went with 5X.

5X 7.5A = 37.5A surge on one 120V leg.

The unit is rated for 25A maximum output per 120V leg.

I am showing you that the startup current of the saw exceeds the unit's rating.

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Michf1r3f1ght3r said:

110% max for max amount of time? As soon as I hit switch it errors out. Instantly.

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Michf1r3f1ght3r said:

Ok I see but the saw works fine when I plug it into a 20a outlet from the house.. wouldn't ot pop a 20a breaker if it was pulling 25a? I'm definitely not an electrician. Lol

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sunshine_eggo said:

Fault code 07 Overload error. The inverter is overload 110% and time is up. Reduce the connected load by switching off some equipment.

It may also be that you're WELL over 110%, and maybe even the 200% lol

sunshine_eggo said:

No. This is normal. Breakers are designed to handle surge.

Grid can handle normal surge without issue, and it does it every time you run an electric motor.

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Ahh ok. Well, looks like I'll just have to run my saw and jointer off the house. Thx for all the info.

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sunshine_eggo said:

Something like this MIGHT work:

Amazon.com

Not a recommendation, but I believe some have reported similar devices providing a benefit. There are legitimate soft starters designed specifically for reducing the surge of an A/C compressor, and those legit work.

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sunshine_eggo said:

Again... NO experience with it. I wouldn't throw dollars at it without more confidence.

Worth evaluating the battery wiring - size and proper connections before more $ spent.

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Michf1r3f1ght3r said:

pretty sure the battery wires are correct but im gonna up grade anyway.

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