Upgrade or not?

This is my 12 volt system: 2 100ah battleborn lithium batteries (1 yr old), 40A renogy rover mppt controller, 3-190w solar panels. Batteries/panels are in parallel.

I ordered the Renogy shunt which is much better than the LCD monitor I currently have.

Now I am thinking of upgrading to:
Victron smartsolar 100/50 mppt controller.

Will I see better performance with victron over the renogy controller?

Upgrade will allow me to expand on panels if I want to down the line. I am more interested to know if it's worth it for me to upgrade the controller now. ?‍

When I had my 12v system, I upgraded from the 40a Rover to the Victron 150/35 SCC.

I wanted to be able to see daily PV history and performance
The 150/35 can work with 12-48v batteries, which would allow me to use it going forward, even when I expanded to a larger 48v system.

The Victron SCCs have a very fast MPPT tracking, which allow the charge controllers to lock on to the max power point very quickly.

They are not getting cheaper and inflation is still going up so if you plan to expand your system in the future it’s a good investment and the units are rock solid and you can run 2 mppts at the same time off of different panels adding even more capacity

You really should have a 60a SCC on those panels, that would make the biggest difference. I can't recommend Victron though, I work for a living.

This was my reply to someone else....

I was basically told the same thing by Renogy when I asked why the monitor, app and charge controller all showed different battery voltages at the exact same time.

Rednecktek said:

You really should have a 60a SCC on those panels, that would make the biggest difference.

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3 * 190W / 13.4V (a typical charge voltage) = 42.5A

47.5@12V
39.6@14.4V

Panels RARELY put out more than 90% rated, so 50A is more than enough and 60A is just... unnecessary.

Rednecktek said:

I can't recommend Victron though, I work for a living.

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A lot of us do. Not sure how that applies.

w8dev said:

I was basically told the same thing by Renogy when I asked why the monitor, app and charge controller all showed different battery voltages at the exact same time.

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All charge controllers will report higher than battery voltage because they have to. Their voltage measurement is influenced by the current they are sending to the battery. The best option with Victron is to get a smartshunt, BMV or smart battery sense to feed OCV to the charge controller.

When the MPPT is not charging, it should read the same as any OCV measurement within the limitations of accuracy and calibration. Sounds like one or both of those Renogy voltage numbers can't be trusted.

sunshine_eggo said:

All charge controllers will report higher than battery voltage because they have to. Their voltage measurement is influenced by the current they are sending to the battery.

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From what I've read on this forum, reading low (not high) is a known issue with Renogy SCCs. My Renogy Rover 40 amp SCC consistently reads .25V low (even .3V low at higher voltages) compared to my Victron smart shunt and multimeter, so my settings on the SCC are based on the expectation that it will be reading voltage 0.25V low. I would love to have a Victron 100/35 just for the ability to view data (like w8dev said), but as the Renogy works fine now that I know its limitations, it's hard for me to justify the cost of switching. However, if i had to replace it I would get the Victron for data logging and viewing features - the Renogy app is terrible.