I recently added two more Revov R100 batteries to my solar installation. 

Currently running the following:

• 2 x SunSynk 5kw inverters in parallel
• 4 x Revov R100 (100 Ah each) - 2 batteries are just over a year old, and 2 new batteries added.

Everything is connected to Solar Assistant which enables me to see the details of each battery.

After about three days, the two older batteries are on nearly the same charge, and the newer batteries are much less. (See pic attached). 

I also include a wiring diagram to indicate how the batteries are connected.

Is the difference in the state of charge normal, or am I missing something here?

When adding batteries, it is advisable to ensure they are on the same stage of charge %. You might need to charge them individually until they are all at 100% and then add them as a group.

Hi. Not directly related question but are the revov batteries good?

7 hours ago, Dadoo123 said:

Hi. Not directly related question but are the revov batteries good?

I can't comment on the current model line, but really they're only an option if you are running a Sunsunk or a Victron inverter. Their BMS doesn't offer comms with anything else

20 minutes ago, Bobster. said:

I can't comment on the current model line, but really they're only an option if you are running a Sunsunk or a Victron inverter. Their BMS doesn't offer comms with anything else

Also lux and growatt for the R100 model

Edited March 25, 20251 yr by Stefan Cornelissen

2 hours ago, Stefan Cornelissen said:

Also lux and growatt for the R100 model

They advertise that they are compatible with Victron and with Sunsynk.

When I had Revovs I was told that of course they were compliant with my inverter. But it meant no comms cable and modifying settings on the inverter. There was no comms, and it didn't work very well.

Contrast with the Freedom Won Lite. The technician set the inverter to the default lithium setting, plugged in the cable and the BMS took over, set everything on the inverter the way it wants it, and I modify any settings the BMS just changes them back. That's compatibility.

Just now, Stefan Cornelissen said:

Also lux and growatt

17 minutes ago, Bobster. said:

They advertise that they are compatible with Victron and with Sunsynk.

When I had Revovs I was told that of course they were compliant with my inverter. But it meant no comms cable and modifying settings on the inverter. There was no comms, and it didn't work very well.

Contrast with the Freedom Won Lite. The technician set the inverter to the default lithium setting, plugged in the cable and the BMS took over, set everything on the inverter the way it wants it, and I modify any settings the BMS just changes them back. That's compatibility.

What inverter did you run?

On the luxpower facebook page few people are running coms fine on luxpower units with revov's

Thanks. Any idea if its Sunsynk and Deye or specifically only Sunsynk?

For fear of hijacking, let me get rid of my OCD 😃

As I did not read the tread when it started, I only stumbled across it now, due to the recent activity.

I'm sure the original problem of differential SOC's have been dealt with OK.

However, when looking at the Battery Cabling Picture, my little brain doesn't agree so lekka...

I recon the cables from the battery to Busbar and the cables between Busbar and Inverters are the wrong way round.

Think of it this way. Not sure what C rating the Revov is, but let's say it's between 0.5 - 1.0. So each Battery can deliver 50-100A. That's 200-400A !! Pushing that (even 200A) through a 35mm2 cable.😬 Conversely, from the Busbar, the same 200-400A is now split between the 2 inverters. That's 100-200A per inverter, so those cables could be half the size of the cable between batteries and Busbar. (i.e 35mm2).

I recon the Battery to Busbar cable should be 70mm2, in order to make things safe(r).

Or is my OCD getting the better of me? What say the experts?

3 hours ago, Stefan Cornelissen said:

What inverter did you run?

Goodwe.

I should point out that these were very early Revovs, not packaged like anything they advertise now.

They were run with no comms, just with the inverter checking voltages and (I presume) counting coulombs. In this configuration the SOC tracking was not accurate. So a box that Revov used to sale, which converted the RS-485 comms to CANBus was put in, now there was better tracking (though still with some discrepancy) and the battery would sometimes disappear - IE the inverter was not aware that a battery was installed and ran as grid-tieid. The installer would come out and had some way of "jump starting" the battery, which would make the inverter aware of it again.

At this point I turned on a feature that the Goodwe has (and it's interesting that it has it) that would restart the batteries in the morning if they had stopped. It would do this by sending a pulse to the batteries, and it would only do this when PV came online in the morning. So if the battery fell over during the evening then.... somehow this never happened at the same time as load shedding. Either because the installer got there in time or because we would have load shedding during the day when the sun was up, grid power through the night and then the inverter would kick everything back into life into the morning.

After about 3 years the batteries started showing much quicker discharge under load. Revov tested the batteries, said they were OK, and removed the RS485 -> Canbus converter. No comms, but the SOC seemed better if you believed the inverter. If you looked at the LEDs on the BMS you got not an exact figure, but also not a figure in the same post code.

Revov insisted they had other customers with the same inverter, same batteries and everything running smoothly. I said well then it's simple. Go to one of those sites, record the settings on the inverter and apply the same here. They said they would but they never did.

At this stage the installer offered me a buy-back as a trade in on a new battery. Said he was now only installing BSL and Freedom Won (LiTE only). Then he said that BSL do not claim to have comms with the Goodwe and so it was FW or nothing. This is how I came to have a FreedomWon 10/8. That battery completely transformed my experience of owning a PV system. The old instability went away, the setup was very simple (as described earlier) and the battery has been very reliable.

3 hours ago, Stefan Cornelissen said:

On the luxpower facebook page few people are running coms fine on luxpower units with revov's

I looked at Revov's own web site. They only claim compatibility with Sunsynk and Victron. It's quite possible that they can be got to work with other brands, but Revov aren't claiming that. So would they offer any support?

Edited March 25, 20251 yr by Bobster.
clarity

3 hours ago, Dadoo123 said:

Thanks. Any idea if its Sunsynk and Deye or specifically only Sunsynk?

As per https://revov.co.za/r100-lithium-iron-battery/ "compatible with all known Victron and Sunsynk inverters"

25 minutes ago, Bobster. said:

Goodwe.

I should point out that these were very early Revovs, not packaged like anything they advertise now.

They were run with no comms, just with the inverter checking voltages and (I presume) counting coulombs. In this configuration the SOC tracking was not accurate. So a box that Revov used to sale, which converted the RS-485 comms to CANBus was put in, now there was better tracking (though still with some discrepancy) and the battery would sometimes disappear - IE the inverter was not aware that a battery was installed and ran as grid-tieid. The installer would come out and had some way of "jump starting" the battery, which would make the inverter aware of it again.

At this point I turned on a feature that the Goodwe has (and it's interesting that it has it) that would restart the batteries in the morning if they had stopped. It would do this by sending a pulse to the batteries, and it would only do this when PV came online in the morning. So if the battery fell over during the evening then.... somehow this never happened at the same time as load shedding. Either because the installer got there in time or because we would have load shedding during the day when the sun was up, grid power through the night and then the inverter would kick everything back into life into the morning.

After about 3 years the batteries started showing much quicker discharge under load. Revov tested the batteries, said they were OK, and removed the RS485 -> Canbus converter. No comms, but the SOC seemed better if you believed the inverter. If you looked at the LEDs on the BMS you got not an exact figure, but also not a figure in the same post code.

Revov insisted they had other customers with the same inverter, same batteries and everything running smoothly. I said well then it's simple. Go to one of those sites, record the settings on the inverter and apply the same here. They said they would but they never did.

At this stage the installer offered me a buy-back as a trade in on a new battery. Said he was now only installing BSL and Freedom Won (LiTE only). Then he said that BSL do not claim to have comms with the Goodwe and so it was FW or nothing. This is how I came to have a FreedomWon 10/8. That battery completely transformed my experience of owning a PV system. The old instability went away, the setup was very simple (as described earlier) and the battery has been very reliable.

I looked at Revov's own web site. They only claim compatibility with Sunsynk and Victron. It's quite possible that they can be got to work with other brands, but Revov aren't claiming that. So would they offer any support?

Might be the the older version before the R100

https://www.geewiz.co.za/index.php?controller=attachment&id_attachment=2523