Adam De Lay
Solar Wizard
Had you enabled option 23?
A soft start for for A/C would be a lot cheaper option...Just now a surge kicked in. Lights flickered and I happened to have Solar Assistant in front of me.
Sudden drop in PV power, battery dropped from charging +2000w to drawing -100w or more (no drop in voltage) and the Grid kicked on. Exactly what I'd expect to happen when battery and PV cannot handle the load.
This again leads me to my thinking that the BMS shutting the voltage down when its under heavy draw is resulting in the F52 error.
Thinking maybe another battery is the answer but it a very expensive solution.
I'm hoping that after this heat wave passes and the Central Air is no longer needed, I won't see the F52 error til next summer.
Jk -A soft start for for A/C would be a lot cheaper option...
What brand is your BMS?
A soft start for for A/C would be a lot cheaper option...
What brand is your BMS?
I did enable it before the last f-52 error so it didn't make a difference.Had you enabled option 23?
But it seems the inverters are not being overloaded so I don't think that option matters in my case.Jk -
I did enable it before the last f-52 error so it didn't make a difference.
Kind of; when the inverter goes into error mode it needs to decide what to do very quickly. An unstable DC bus will often lead to unstable control logic. We have had equipment in the past (industrial) where supplemental control power supplies were used to ensure isolation between sources. I doubt this inverter has a separate power supply from the AC input, which makes recovering to bypass harder.So it is in fact normal that a sudden loss of battery shuts the entire system down? Except the inverters remain on with the help of the grid.
You need more battery.Thank you for your help. I think one big issue is does anyone even know what Low Bus Voltage even refers to or why it really happens? Battery, pv, grid? Apparently SS has no idea.
When I first started up my inverter with a pre-Charge resistor, (Multiplus II 48V) I got a low battery light.I can't say for sure, so my guess is speculation. I am guessing it means the internal DC bus is not high enough. (This is different than the battery voltage. ) This kind of error is often unrecoverable. One common cause of this type of error is if the batteries are run open loop and suddenly shut off. The sudden change in current can cause a voltage spike on the internal bus that can damage components.
Look on the side of the outdoor compressor unit at the label plate, specifically look for the compressor LRA for Locked Rotor Amperage rating of your 4t or whatever AC unit. Mine was something like 109Amps (LRA) and 19.9RLA. While it's running (after compressor has kicked in) it is only maybe 44 amps if memory serves correctly. It's the in-rush which is a killer, and why I am thrilled with my micro-air Easy Start, which easily chopped that in half. Anyway, best of luck in sorting out your issue.I found 2 answers online. One said 2900 surge the other said possibly between 3000 - 4000w.
I do have 2 inverters running split so it should handle at least 6500 Watts each.
That was my first impression too. Except …You need more battery.
@FilterGuy Popped in briefly when asked much earlier in the thread. I didn't see any other call outs to Signature Solar.The interesting thing about this thread is that a bunch of forummers are pitching in to try and help diagnose the problem, which is as it should be. While the entity who sold the unit hasn’t even shown up, which most definitely isn’t as it should be.
Me either. Now that you're here, maybe somebody can TLDR it for you.I am trying to follow up but im
Not sure what post is what and what the actual problem is.
Gee, I wonder if reading the OP’s well-written posts in this thread and looking up your service history on this unit might offer a clue. ??Not sure what post is what and what the actual problem is.
Ouch.Gee, I wonder if reading the OP’s well-written posts in this thread and looking up your service history on this unit might offer a clue. ??
Rule# 37Ouch.
I'm afraid it's the same old story Marcus, dodgy 6500s and unfortunately poor customer service.
Man I do not envy you some days especially here LOL
And everyone else, you do realize Marcus has a day job too right haha.
In that case I apologize to Markus; I was under the impression his day job was working for SS. Random forum posters have every right to be obtuse; for-profit tech reps do not.you do realize Marcus has a day job too right
Thank you and I am the R&D Director for EG4 so i am very busy and I jump in here when i have time. I want to help anyone I can.In that case I apologize to Markus; I was under the impression his day job was working for SS. Random forum posters have every right to be obtuse; for-profit tech reps do not.
Thank you and I ma the R&D Director for EG4 so i am very busy and I jump in here when i have time. I want to help anyone I can.