Llaves
New Member
They're already wired for 240V
They're already wired for 240V
you need a clamp meter with inrush function to measure the inrush. only then you determine if you can run this AC.This is hopefully a quick easy question.
I’m reading the manual for the 15 Sol-Ark trying to make sure the AC units I wanna use will not trip the inverter.
So if I’m reading this right, the Sol-Ark 15 can surge it’s output to 24,000VA at 240V, essentially 100 amps for 10 seconds.
So if I had an AC unit turn on that used 80 at startup, then idled down to say 40 amps, on battery and or Solar, the Sol-Ark should have enough surge output to startup the AC load without tripping?
Is that correct?
14 FLA, 3220 VA. LRA not quoted, will assume 5x which would be 16,100 VA.
Sol-Ark rated 24 kVA surge for 10 seconds should have been able to start that. (would have been too much on 120V)
The batteries are not daisy-chained, each is connected to a bus bar with about 5' of 6 AWG. The bus bar is connected to the inverter with 5' of 0000 copper cable. The total resistance is about 2 milli-ohms, so the voltage drop is a fraction of a volt.Rated 120A continuous, 300A (1 second) per battery, should be able to supply 500A for 24000 VA surge from 48V battery.
But look into how your batteries are bussed together - do you connect positive and negative to opposite ends, so current draw is reasonably balanced?
How much resistance from batteries to inverter, and what voltage drop expected?
maybe that motor should start, but the empirical evidence is that mine don't.14 FLA, 3220 VA. LRA not quoted, will assume 5x which would be 16,100 VA.
Sol-Ark rated 24 kVA surge for 10 seconds should have been able to start that. (would have been too much on 120V)
New SawStop with 3HP, new 3HP motor on bandsaw. They start just fine on my generator (no grid available).Capacitors in good shape? I have a compressor that was having trouble starting (on the grid). I replaced capacitors, but that didn't help. I think I had damaged windings with brown-out.
Is it really worth getting the motor rewound? Around here (Albq), rewinding starts around $500. A new motor is around $300.When it wouldn't start any more I replaced the motor, will get original rewound.
Problem occurs even with full battery plus 10kW of solar input available and generator running.Check battery voltage on input of Sol-Ark during this event. If voltage from battery or through cables sags, that would limit its output.
Maybe specs are only achieved at top battery voltage? But would expect power output to derate linearly, not enough to drop from 24 kVA to below 16 kVA.
The 12K has separate faults for DC voltage low and DC over-current, but the manual says any of these can occur for the same underlying fault.
why do you say this? The fault is an F18 AC overcurrent fault, not theF20 DC current fault.This is the only clue we've got left. It is complaining about DC, not AC current.
48A. Voltage sags to 160-170V (Peak readings on Fluke 325)Have any way to test AC current peak?
Not easily - the tools are in the shop, the inverter/batteries are in the house.DC current peak? Can you measure the momentary DC voltage dip?
The firmware is only a couple of months old. I can check, but I doubt there is anything relevant available.See if SolArk has a firmware update, or can help you with the issue.
I think we heard they started out with conservative limits, to protect their equipment, and were able to loosen them.
Honestly, 4x 6ga does not sound all that great to me.
why do you say this? The fault is an F18 AC overcurrent fault, not theF20 DC current fault.
48A. Voltage sags to 160-170V (Peak readings on Fluke 325)
Not easily - the tools are in the shop, the inverter/batteries are in the house.
And I've gotten tired of blowing the house offline and having to reset all the clocks.
The firmware is only a couple of months old. I can check, but I doubt there is anything relevant available.
I said my 12K reported an F18 AC over-current fault. That was the only fault it reported in multiple shut-down events when starting any of these motors."The 12K has separate faults for DC voltage low and DC over-current, but the manual says any of these can occur for the same underlying fault."
Do you mean the 12k manual lists DC faults, but your Sol Ark didn't give those errors?
F18 Tz_Ac_OverCurr_Fault Overloaded the Load Output, reduce loads. Wiring Short on the AC Side can also cause this error. Overloads
can result in F15, F18, F20, or F26.
W != VA for reactive loads48A x 240V = 11520 W, should not be a problem. (12k? 15k? Which model?) But either way, should be within surge rating.
Llaves, have you called Solark? I had f18 faults that didn't make sense and they updated my firmware several times and each time they updated, my f18 errors happened less. I think they are still fine tuning things and loosening the parameters as Hedges said.I said my 12K reported an F18 AC over-current fault. That was the only fault it reported in multiple shut-down events when starting any of these motors.
The manual contains this wording that I find bizarre:
I believe the last sentence is telling you that an overload can result in a variety of errors, but it is not saying that the reported overload isn't the actual source of the error. For example, with too little battery capacity the overload will result in a DC Current overload whereas on a system with lots of battery you will get an AC current overload, which is what I'm seeing.
W != VA for reactive loads
The 12K (and the 15K) are rated in terms of kVA, which takes into account the load factor for reactive loads. This is not measured by a readily available meter. As far as I can find, meters for measuring reactive loads are on the order of $10K.
I got my verification @Quattrohead, even starting both of these up, since they have internal inverters and DC motors they slowly ramp up the load and should be able to run fine on a signle Solark 15K.Did anyone even look at the specification sheet for this guys AC unit? Or is this just a typical completely derailed thread.
The OP linked to LG heat pump inverter systems therefore there is no startup surge whatsoever.
So there should be no problem starting those things up with any inverter...... in theory lol