Unanswered Questions in inverter rs

hi there!

I upgraded my system with the inverter in the title, and I have trouble setting it up correctly with my system, problems I have so far:

>solar charger will not start charging even though it has energy.

>not sure how to setup batteries, I have lifepo4 ones (4 in series) and they have a rudimentary bms, which is not accessible from the outside, no BT or CAN or similar)

>I decided to keep the solar charger (smart solar 150/70) of the prior system connected, currently it is charging the batteries, but the RS will seemingly randomly shut down

so about the shutdowns: in two days I got the #29 "battery overcharge" error code twice, yesterday noon when the solar charger (of the smart solar unit, mind you) went into absorption mode, and voltage was 56.80V, interestingly the RS showed slightly higher values than the solar charger. also the 4 series 12v batteries were not perfectly balanced yet, I have since installed 3 battery balancers from victron, and they are dead on balanced since yesterday evening.

so the second shutdown was weird though, it happened when there was little to no sun in the morning today, the batteries were at about 75% and the voltage was way off the maximum. this led me to try to dive into the menus to fix the issue, and to try to feed the MPPT of the RS instead, but as initially pointed out, I did not even get it to charge at all, not sure why.

so to sum it up, this unit is a bit weird for me, I used to have a cheap chinese inxiii 2400w 24V inverter which workes flawlessly without a single shutdown since about october in my old 24V system, with 4 of the same batteries.

what's happening here?

two thoughts I had:

>maybe I need to change battery preset to anything but lifepo4, albeit my batteries are lifepo4.

>maybe I need to find a way do disable the BMS? why does and inverter have a bms anyway? I was not aware of this initially.

any hints tips or an outright solution would be highly appreciated. if some pro could give me guidance on how to setup the battery that I have (for which there is not preset) that would be awesome.

I had no issues setting up the battery with the smart solar 150/70, but it doesn't have fancy bms tech, either, does it?

cheers,

bill

p.s.: I can't leave my home rn, as a fridge sits on this inverter, and when it decides to protect me (forced protection seems to be quite trendy these days, especially by governments) even though the BMS inside my german made (no, not german assembled, but german made) expensive lifepos is doing a nice job with overvoltage, overcharge, undervoltage, undercharage, overtemp, and undertemp protection.

p.p.s.: some more thoughts/observations:

>battery voltage measurement is exactly 0.05V higher from the RS than either the smart shunt or the MPPT150/70 during charging, I think it is about the opposite (lower by 0.05V) when discharging, but I will report back on this in the evening. what could this indicate?

>just checked in the RS' history tab, there are three errors, some hopefully due to me installing and connecting things, cause I never noticed them before, the are: #29 overcharge protection (we know this one), #10 battery low voltage (probably cause I disconnected the battery when connecting the balancers) #53 Inverter internal DC level (curious about this one). the main takaway here though is the max recorded voltage of my string of 4: 56.96V, which even if the RS shows .05V more than the other devices, is still "only" 14.24 per battery, which has an end of charge voltage of exactly 14.4V, according to spec-sheet. so again, what's happening here?

> is it possible the RS is not really designed or compatible to be used in inverter only mode, with a separate charge controller like I do? to me it seems the RS somehow "thinks" "look, the battery voltage is rising while I am not charging it, so it must be faulty? better shut it down" and then shuts down..?

No data from my Inverter RS Smart Solar 48/6000/100 is displayed via the Cerbo GX VRM online portal. The setup and internet connection seem to work fine. The dashbord displays but no data is present for anything. The status says OK, and there are no error messages to be seen anywhere via the PC. The 2 devices are connected via VECan with RJ45 and terminators at either end. The remote console is working fine and I can update settings. In the Victron Connect app my device list shows the Cerbo GX and the RS 48/6000, but also the user named cerbo GX as well, which I did not expect. The VRM tab only shows the user named cerbo GX but I do get the MQTT-RPC error here (error code #R2) if I try and access it via the app; which most users on the forum say is temporary and goes away when you use it later. Any hints on possible configuration explanation for the lack of data before I concude the cable (or something else) is faulty? Suggestions greatly appreciated.

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We have a vehicle (van) with a 12 V system and 4 kVA Quattro. We wish to supplement the 48 V (Pylontech) battery charge, when driving the vehicle, by charging the battery from the vehicle 12 V supply.

We have tried two different 1 kW 12 V to 230 V sine wave static inverters connected to AC-IN-1 (the generator supply to the Quattro). Despite adjusting the Quattro input current limit to minimum (4 A), shortly after the inverter supply to the Quattro is enabled the 1 kW inverter is destroyed. The output H-bridge at the output of the 1 kW inverter becomes damaged shorting the high-voltage supply in the inverter.

We believe that the Quattro inverter is essentially back-driving the inverter mains output (once the relay clicks in) and the phase alignment is lost as soon as the Quattro draws current from AC-IN-1 and loads up the 1 kW inverter.

Has anyone out there had any good experiences with charging from an inverter connected to the AC-IN-1 connection to the Quattro?

A potentially safer charging option may be utilising a battery-to-battery charger to charge the 48 V battery more directly using 48 Vdc. Unfortunately, Victron does not produce a 12 V-to-48 V B2B charger so we are considering Sterling Power unit. The Sterling B2B does not have a communications bus and is unable to communicate with the CCGX or Quattro. Therefore, we will effectively be charging blindly.

Would this possibly cause a charging conflict or race conditions with the Quattro when the B2B charger is on if the BMS is unaware that there is another charge source connected?

There’s also a mention of having to set the float voltage of secondary chargers slightly higher than the primary master charger in order to provide a clear cut off and resolve charging conflicts between the Quattro and the B2B charger. It is unclear if the B2B has a means of adjustment.

Off Grid site installed in June 2021 has had two Error 42 Ground Fault events. One 2 months after install and one in the last 2 days. On detailed inspection with (full insulation resistance testing with a Mega tester Fluke etc) no faults could be found on array cables to earth, (and other cables that wouldnt be likely to cause issues). Has anyone else had this Error and could not locate cable faults etc? Or any other suggestions. All JA Solar panels, cables etc were brand new and have been visually checked for damage. No 4G coverage so system is not on VRM

Keen to hear thoughts.

David

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I have a well with a solar pump. When the sun is out and the float switch is tripped in a tank, a 3kw / 240v dc pump starts using power via a controller.

Most of the time though, like 95% of the time, the 4kw / 240v dc array is being unused.

I'd like to hook an RS 48/6000 up to charge batteries and create 240v ac for a nearby cabin.

So I *think* I'd like someway to tell the victron controller "hey, stop using power when the pump wants it."

Worst case I could do some serious electrical engineering with high capacity relays and arduino but I'm hoping there's a simpler technique via built-in victron functionality.

This is to the minds at Victron (@mvader @johannes). I am considering a move from dual 3k multiplus to the 6k RS or a 5k multiplus 2. I have read all the data sheets but I want to know what the brains at Victron would choose if they had to start two motor loads (air conditioners)? I know the RS is a high frequency design that may not start motors as well as the LF designs, but it has other benefits I would like to have. Any thoughts would be appreciated.

Description of failure:

I have a Victron Multipass 12V / 2000. I am using a induction range that pulls between 60~85amps. It has tripped the inverter and the red flashing (slow flash) alarm light is on all the time. Eventually the inverter shuts down all together. When reset, it will work again for a period of about 5 minutes once reset (power cycle down). With shore power no issue. WIth engine on same situation where it lasts about 5 minutes then when using induction range it will trip the inverter again red flashing light. WIth engine on eventually all comes back on operable, but then after use same situation - trips off.

Took the unit into a auto repair shop. They stated that the alarm parameters are "too tight" and the unit is shutting down as a result.

My new system is based on a RS 48/6000 and a Fronius Primo 5.0

Look at these 4 screenshots taken at same moment, on GX Touch and Victron Connect :

Maybe an upgrade of the RS firmware will simply solve the problem ?

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