Which battery setting for MPPT Controller?

[BlueStringPudding]

I've got new batteries which are 4 × Numax Sealed Wet Leisure Batteries 12v 105Ah (CXV31MF)

 

My Victron MPPT solar controller gives me the following seven battery options for setting up the controller (see photos) - none of which are to me an obvious match for my batteries, but you guys and gals may know better. 

 

Please can you tell me which of these are a suitable setting for my batteries? Thanks

 

 

Edited June 2, 2024 by BlueStringPudding

[Tony Brooks]

Without the battery data I would think 2 will be fine and 1, but 1 would be a little slower to charge the batteries, you may not notice the difference.

[BlueStringPudding]

Thanks, Tony. This is where the battery data is:

 

https://www.tayna.co.uk/leisure-batteries/numax/xv31mf/

[Tony Brooks]

1 minute ago, BlueStringPudding said:

Thanks, Tony. This is where the battery data is:

 

https://www.tayna.co.uk/leisure-batteries/numax/xv31mf/

 

Yes, but they do not seem to give any idea about the gassing voltage or the maximum absorption voltage, which is what you need.

[jonathanA]

There is a user defined setting. Basically you can edit the settings and save the modified set up. Here is a screen shot of mine. Similar flooded LA batteries.

Leave everything else as is.

[BlueStringPudding]

Is Equalisation recommended for Sealed Wet batteries? 

 

At the moment Equalisation is set to Manual only.  I've used settings 2 which I think means the Equalisation voltage is 16.1v. 

 

Should I change it to automatic equalisation rather than manual? And is that voltage okay for my type of batteries? 

[ditchcrawler]

2 hours ago, BlueStringPudding said:

Is Equalisation recommended for Sealed Wet batteries? 

 

At the moment Equalisation is set to Manual only.  I've used settings 2 which I think means the Equalisation voltage is 16.1v. 

 

Should I change it to automatic equalisation rather than manual? And is that voltage okay for my type of batteries? 

I wouldn't try to equalise a "maintenance free" battery I wouldn't take it above 14.4 volts

[Rob-M]

My Numax Sealed LAs are configured like this on my Victron controller 

 

[BlueStringPudding]

I can't see the rotary switch on mine so I've set it via the app. I think this means the same as yours @Rob-M

 

 

[Rob-M]

9 minutes ago, BlueStringPudding said:

I can't see the rotary switch on mine so I've set it via the app. I think this means the same as yours @Rob-M

 

 

I'm not sure where the rotary switch is, Ed Shiers set mine up and I've not touched it.

[jonathanA]

If its a smartsolar with blue tooth jobbie, i dont think there is much you can do without the app. (Or some of the other clever victron kit networked to it)

[BlueStringPudding]

The above photo is from the app. Mine is a Blue Solar with a Bluetooth dongle added. That's how I ended up with the above settings, which I'm hoping are right 😊

[MtB]

9 hours ago, BlueStringPudding said:

Is Equalisation recommended for Sealed Wet batteries? 

 

No. 

 

The idea is, when they are ready for equalising, you don't. Instead, you weigh them in and buy new ones. 

 

Troublesome things, batteries...

 

 

 

Edited June 3, 2024 by MtB
Bloody spell chequer interfering.

[blackrose]

The general rule of thumb as I understand it is that sealed lead acid batteries should not be charged above 14.4v. Having said that, I've got 2 sealed Hancook batteries for my BT which for some reason accept 14.6v. I guess they must be a different chemistry to regular sealed LA batteries.

 

My start and domestic batteries are open wet LAs which take an absorption charge of 14.8v and all the batteries on my boat are charged from the same charge source whether that's a mains charger, the alternators or the MPPT controller via a VSR. However the voltage drop along 17m of 16mm2 cable to the bow means that 14.6v is the maximum the BT batteries get.

 

I think people sometimes forget when they buy new batteries and set up their charging devices, that they may need to align the charge parameters across different battery banks.

Edited June 4, 2024 by blackrose