yes, it's the BMS thing, which kind of annoying. Some manufacturers insist on specific BMS, which I understand because of specific communication package; but would be nice to have a "user/custom" battery setting and let the user takes responsible for BMS stuff, for a DIY battery bank for example.
New Lux Power LXP-LB-US 12k / GSL-H-12KLV-US with 200A AC Passthrough Current (US Market)
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I have a question about all of these concerns regarding over charging a Lithium battery. Doesn't the BMS of the battery prevent overcharging? that has always been my understanding. I do understand this can be of concern for other types of batteries.
It does, but consider it a last line of defense to prevent damage. If the voltage per cell (or per pack) goes too high, all the BMS can do is completely disconnect, which is not good for the inverter. Closed loop communication between inverter and BMS helps prevent this scenario - the inverter is ultimately responsible for charging, but the BMS can request a lower current, or for charging to stop altogether before limits are reached.
Not Aerosmith
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GSL has just told me that LXP has provided GSL with a firmware update to parallel inverters:
Not Aerosmith
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Is there any reason, why I can't simply removed (2) existing 5KW Fronius Primo GT inverters and replace them with the (2) new 12KW GSL hybrid inverters reusing all existing 30A wiring and connections to the existing inverter breaker panel and existing 80A wiring to the smart meter and grid?
The intent is not to convert to hybrid mode, but continue to operate "as is" on grid only. For now, I will not be using the generator or the ups functions or AC coupling. The third 5KW Fronius Primo GT inverter will continue to feed the grid with no change in wiring.
I would like to test the (2) new inverters in parallel now with the existing solar panels as a GT system, which is exactly how the existing GT inverters are working. When I get the batteries, I will then attempt to convert to a hybrid system with new larger capacity wiring, breakers and disconnects. I will also attempt to AC couple the one Fronius Primo inverter when I have batteries.
The intent is not to convert to hybrid mode, but continue to operate "as is" on grid only. For now, I will not be using the generator or the ups functions or AC coupling. The third 5KW Fronius Primo GT inverter will continue to feed the grid with no change in wiring.
I would like to test the (2) new inverters in parallel now with the existing solar panels as a GT system, which is exactly how the existing GT inverters are working. When I get the batteries, I will then attempt to convert to a hybrid system with new larger capacity wiring, breakers and disconnects. I will also attempt to AC couple the one Fronius Primo inverter when I have batteries.
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fromport
Solar Addict
I don't see a problem. Fronius accepts a higher Voc then most inverters.
That is the only limit you would have to watch imo.
Should just work [famous last words]
Once you have them hooked up, you should connect the outputs together, install the data cables, set the main/follower setting on the inverters.
If you then have enough PV power and flip both breakers to the grid, they should continue providing output power in sync and if you hook up a load (though a breaker!) you should be able to get readings on the LCD touch screen how much power each of the inverters is providing to the load.
That should be balanced at that point.
Not Aerosmith
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You mentioned output power in sync. Right now all three Fronius communicate and are in sync. There could be a potential problem of being in sync with the third Fronius inverter not in parallel and working independently from the two new GSL inverters.
fromport
Solar Addict
You described replacing the existing fronius 1:1 with the LP inverters.
You will hookup the PV panels to the DC input(s) and the grid .
There will be no change to your current situation.
everything will be synchronized to the grid and back feeding to the grid
then you said you want to test.
first you power off everything. (PV & AC of both LP's)
in that case you will have to hookup your 2 new LP inverters OUTPUTS (ESS) (through a temp/small breaker) to a sub panel.
you also hookup a load (through a breaker) to that sub panel.
you hookup the data cabling.
You switch on LP#1 with PV only that will be the master controller and give it the right ID for being used in parallel.
switch on breaker to subpanel (leave grid off)
switch on LP#2 with PV, configure it to be a follower of #1.
Once configured correctly, you can turn on the AC output breaker of LP#2 to the sub panel and the 2 LP's should be in sync.
Now you can test a small load only on the output.
Eg a 1000 watt heating element and 500 watt should be coming from LP#1 and 500 watt from LP#2.
This is pure an off grid test and only the 2 LP's should be synchronized at that point.
Once you enable the grid breakers again, everything will be synced to the grid again.
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Not Aerosmith
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I did get a clarification from GSL about what is meant by working without a battery.
fromport
Solar Addict
Bummer, I thought/hoped it would provide some backup with PV only.
You will have to wait till your batteries are hooked up to test paralling.
fromport
Solar Addict
Why would they need a serial number?
Will you only get the release notes for the firmware on that particular unit?
Search for the postings where several of us posted firmware versions by posting picture of color lcd screen.
Has serial numbers included ;-)
My information is:
Model: 00988C1
Serial number: 2352028131
Firmware version: FA 1.0
Build version: FAAA-0E0D
Thanks. I don't know why they're asking for the serial. I'm surprised I even got a response. I'll keep you posted as to their response.
fromport
Solar Addict
I am pretty sure that with 2000 watt PV available, you can run a 1000 watt load on this inverter without batteries.
I will do this, take some pictures/movie showing that this actually works.
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fromport
Solar Addict
I spoke to the USA dealer i bought my unit from today.
He said the software to parallel inverters currently can go up to 3 units.
There is also another software upgrade available to do AC coupling (he showed me a video of an SMA string inverter AC coupled to the LP.
Currently there seems not (yet) be a software version that does AND parallel AND AC coupling for the LP (& oem) inverters.
I have asked to upgrade my LP to the AC coupling firmware.
Once done, I will hookup a few IQ8 micro inverters and do some testing.
Problem is as always I have a full schedule with my work so not much time during the day when the sun is shining ;-)
He said the software to parallel inverters currently can go up to 3 units.
There is also another software upgrade available to do AC coupling (he showed me a video of an SMA string inverter AC coupled to the LP.
Currently there seems not (yet) be a software version that does AND parallel AND AC coupling for the LP (& oem) inverters.
I have asked to upgrade my LP to the AC coupling firmware.
Once done, I will hookup a few IQ8 micro inverters and do some testing.
Problem is as always I have a full schedule with my work so not much time during the day when the sun is shining ;-)
fromport
Solar Addict
I just updated the firmware of the LCD display unit.
You do that by formatting a micro-SD card (max 16GB) and extract a zip file to it.
Powering off the inverter, insert the uSD card at the back of the display and turning on the inverter.
After a minute the upgrade is finished and will show this:
Turn the machine off, remove the SD card and turn the inverter back on:
The main screen now shows the LCD version info:
Device info now shows extra info about the LCD /image/icon version
In order to use either AC coupling or Paralleling of inverters, the LCD software needs to be updated first.
Attached is the needed info to do this.
You do that by formatting a micro-SD card (max 16GB) and extract a zip file to it.
Powering off the inverter, insert the uSD card at the back of the display and turning on the inverter.
After a minute the upgrade is finished and will show this:
Turn the machine off, remove the SD card and turn the inverter back on:
The main screen now shows the LCD version info:
Device info now shows extra info about the LCD /image/icon version
In order to use either AC coupling or Paralleling of inverters, the LCD software needs to be updated first.
Attached is the needed info to do this.
Not Aerosmith
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Since I have (2) GSL inverters, I will need to chose parallel not AC coupling.
My original intent was not to replace the existing (3) GT inverters, but AC couple to the new (2) GSL inverters. The location that I had selected, unfortunately have gas piping running from within the storage building to under the slab to the kitchen stove, another gas piping to the gas instantaneous water heater and barbeque grille. It is a very small confined space, so it is no longer an option for the new inverters and batteries,
The only option left for me is to replace the (3) 5 KW GT inverters with the new (2) 12K GSL inverters. Therefore, AC coupling is no longer an option.
My (2) GSL inverters were delivered Monday afternoon. I was amazed that the cardboard boxes without any special protection appeared to be completely undamaged.
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Luxpower_Gilbert
Luxpert @Luxpower USA Team
after the update, did you notice any noise from the inverter? The noise is noticeable when the inverter is inverting Power using the battery. noise will go away when power is pass thru. also solar production will divided between battery and grid sell Instead battery first, then load and last to the grid… I notice all this when I did both display and ac couple update..
Luxpower_Gilbert
Luxpert @Luxpower USA Team
I already did this and it works perfectly.
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