Megarevo RxLNA Discussion

[Slvrsky07]

Does anyone have theirs setup grid tied but with battery backup? I would like to have mine function like a UPS for the loads output and still export all extra power after the battery is charged but I do not want to send the battery power to the grid.

 

[NCSolarGarage]

That is how I plan to use mine. Unfortunately, I just got mine on Wednesday, and the CTs don't fit my 200A service aluminum mains. It is the right size for the neutral, but does not fit the mains. I need to see if I can source a CT that will work on the larger diameter cable.

 

[Slvrsky07]

Do you need the CT sensors if you plan to export to the grid?

 

[NCSolarGarage]

Sorry, I misread. I want to export all available energy back to the main grid panel, but NOT past the CTs, neither from solar or battery. I see you only mentioned not using battery back past the CTs.

 

[Slvrsky07]

I have net metering so as long as it stays 1:1 where I am I plan on utilizing it and being connected. I am exporting 100% after loads right now. Every year we have a day or 2 without grid power so that’s where the batteries are a must for me. I’m just not sure how it works with also being grid tied, if the inverter will drain the battery to whatever % set running the loads then gets power back from the grid or it always pulls from the grid whenever available besides PV or how exactly it works. Since the documentation isn’t the best on the manual to know how it works exactly.

 

[dayala]

This is not what I wanted to hear, but what I've suspected.

Question, if I were to order and it later becomes UL listed (which is sounding less and less likely), would the inverter satisfy inspectors/insurance companies later? Or would the lack of a sticker or previous date of manufacture still be a major issue?

How much of the unit's capabilities are still unfunctional? Limiting, priorities, wifi, etc. Any excessive noise or draw issues?

Anyone know of any other limiting hybrid inverters that have similar capabilities, are UL listed, don't have significant draw issues, but are also reasonably priced? I'd pull the trigger on a SolArk 12k is a heartbeat if it was far more reasonably priced, but their huge markup basically doubles my ROI into the stratosphere making it completely unfeasible!

Here it is...

 

[Slvrsky07]

Here it is...

I believe that’s the same one I used to get my passed/ certified with the utility co.

 

[dayala]

Nice work (although above my understanding as well).

They didn't happen to mention anything about UL did they?

Here it is

 

[jsmetalcraft]

I have net metering so as long as it stays 1:1 where I am I plan on utilizing it and being connected. I am exporting 100% after loads right now. Every year we have a day or 2 without grid power so that’s where the batteries are a must for me. I’m just not sure how it works with also being grid tied, if the inverter will drain the battery to whatever % set running the loads then gets power back from the grid or it always pulls from the grid whenever available besides PV or how exactly it works. Since the documentation isn’t the best on the manual to know how it works exactly.

You have a few options. Self-Use mode or Peak Shift. I am not experienced with Peak Shift. In Self-Use you can program to use the battery down to a set SOC when connected to grid. Then you can set the SOC below that for EPS. I feed to CTs and have battery SOC set to 15%. When the battery reaches 15% the inverter will pull from grid and PV if available. I have EPS SOC set to 5%, giving me 10% reserve should power go out.

The setting are confusing at first. 15% SOC charge would be a setting of 85% and 5% SOC would be 95%.

Under Peak shift you can set the times of day when the battery charges and discharges useful when exporting to the utility company. I believe the battery setting would remain the same so you can set it like I do to keep a reserve for power outages.

 

[jsmetalcraft]

That is how I plan to use mine. Unfortunately, I just got mine on Wednesday, and the CTs don't fit my 200A service aluminum mains. It is the right size for the neutral, but does not fit the mains. I need to see if I can source a CT that will work on the larger diameter cable.

My CTs arrived broken. Never did get replacements, so I ordered some off Amazon. Make sure they are 1:1 or 100 amp 1 amp output. You may have to move up to 200 amp CT. The 100 amp are 16mm hole and fit tight to 200 amp AL wire.

Amazon.com: PZCT-02 Current Transformer Snap Joint Structure Split Core Coil Sensor for 100A Amp Energy Meter Mini Split Base Current Transformer : Industrial & Scientific

Amazon.com: PZCT-02 Current Transformer Snap Joint Structure Split Core Coil Sensor for 100A Amp Energy Meter Mini Split Base Current Transformer : Industrial & Scientific

www.amazon.com

 

[marslo]

You have a few options. Self-Use mode or Peak Shift. I am not experienced with Peak Shift. In Self-Use you can program to use the battery down to a set SOC when connected to grid. Then you can set the SOC below that for EPS. I feed to CTs and have battery SOC set to 15%. When the battery reaches 15% the inverter will pull from grid and PV if available. I have EPS SOC set to 5%, giving me 10% reserve should power go out.

The setting are confusing at first. 15% SOC charge would be a setting of 85% and 5% SOC would be 95%.

Under Peak shift you can set the times of day when the battery charges and discharges useful when exporting to the utility company. I believe the battery setting would remain the same so you can set it like I do to keep a reserve for power outages.

Where do you set EPS SOC. I want to use battery at night down to 20% SOC

 

[42OhmsPA]

Can this inverter be used with grid support only, meaning only pulls from the grid without sending back?
I'm ready to pull the trigger and order a Megarevo R8KLNA for use as primary power to my house along with min. 3.5kw array and DIY 16s2p 230ah pack using JBD 200a smart BMS's.
Plan is to rewire the main panel to be fed from the invertor. I'll add new master panel. Reroute the grid input from the current main, disconnet N G bond, to the new master, with N G bond, from the master feed the Mega to the main and the grid to the Mega for backup support only. (wow I need to draw a diagram, US grid for anyone that made it this far).

 

[jsmetalcraft]

Where do you set EPS SOC. I want to use battery at night down to 20% SOC

1. Setup > 2. Battery Setting > 2. Disc-Depth > Grid 80% > EPS 95%

 

[jsmetalcraft]

Can this inverter be used with grid support only, meaning only pulls from the grid without sending back?
I'm ready to pull the trigger and order a Megarevo R8KLNA for use as primary power to my house along with min. 3.5kw array and DIY 16s2p 230ah pack using JBD 200a smart BMS's.
Plan is to rewire the main panel to be fed from the invertor. I'll add new master panel. Reroute the grid input from the current main, disconnet N G bond, to the new master, with N G bond, from the master feed the Mega to the main and the grid to the Mega for backup support only. (wow I need to draw a diagram, US grid for anyone that made it this far).

Sounds like you will want to install the CT's between the master and the Megarevo. There is no setting to disable feeding back to the grid connection. Another firmware upgrade that would be useful to some. Down side to only relying on the CT's is you will always be getting minimum 100+ watts as "Grid support". With anti Reverse set to off the Megarevo will feed EPS first and then extra capacity to the grid. With Anti Reverse set to on, it will only feed to the CT's. Basically the Anti Reverse turns the CT's on or off. In your case it would be nice to be able to turn it off internally in setup with firmware.

There is a Grid Power setting. Not sure if it is set to 0 that this would disable any inverted power to the grid connection. I know that in my case it will limit the power to the grid. For example. I have the stove and HW heater in the main panel. If both come on it would trip the inverter as they could pull more then the 8k watts. I have it set at 80% I think. So lets say EPS pulls 500 watts. 80% of 8000 is 6400 watts. The inverter will supply 5900 watts to the main panel, and the grid will supply the remaining load.

 

[minerva]

SO my friends, my Megarevo lasted 6 months. Megarevo goes boom

 

[NCSolarGarage]

My CTs arrived broken. Never did get replacements, so I ordered some off Amazon. Make sure they are 1:1 or 100 amp 1 amp output. You may have to move up to 200 amp CT. The 100 amp are 16mm hole and fit tight to 200 amp AL wire.

Amazon.com: PZCT-02 Current Transformer Snap Joint Structure Split Core Coil Sensor for 100A Amp Energy Meter Mini Split Base Current Transformer : Industrial & Scientific

Amazon.com: PZCT-02 Current Transformer Snap Joint Structure Split Core Coil Sensor for 100A Amp Energy Meter Mini Split Base Current Transformer : Industrial & Scientific

www.amazon.com

Thanks for the info. Yes, it looks like mine are stamped 90A/90ma and are indeed a 16mm hole. Did those CTs work for you? I will gladly send you mine for the help.

 

[jsmetalcraft]

Thanks for the info. Yes, it looks like mine are stamped 90A/90ma and are indeed a 16mm hole. Did those CTs work for you? I will gladly send you mine for the help.

Thanks for the offer, but the ones I got from Amazon seem to work fine. Also I had to extend them so the originals would need to be extended also. I don't know the guage of wire feeding into the house but the 16mm fit with no room to spare. I can't find the ones I got from Megarevo or I would see if they fit.

Just found one of them, but the core is what broke and fell out. So I would not be much help to see if they fit.

 

[Wet1]

SO my friends, my Megarevo lasted 6 months. Megarevo goes boom

Any more details or idea why it died?
EDIT: Sorry, I just noticed the link.

 

[NCSolarGarage]

Does anyone know the firmware version # posted above? I finally got my unit powered up yesterday and the versions that came loaded are:

ARM: V1.03.06
DSP: C1.04.06

I'm told there is 'supposedly' a firmware update coming that will allow parallel of these units, but no idea if that will ever come about.

 

[MNRosado]

In a previous (now deleted) thread and earlier on this one, I seem to recall others mentioning from 25-40 watts, hence my surprise you were seeing 70W. If you happen to think about it as you're tinkering with your system, follow-up verification could be good data for others. It also seems some units are being sent with different firmware numbers than others, I suppose this could influence it as well.
Thanks for the input!

Hi Wet1, did the test a couple more times and i still get about 70 watts at idle consumption on my victron shunt. Grid on, inverter on, battery on. PV off, Load off.