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Silicone Battery Inverter Settings


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Posted (edited)

Hey Everyone,

I was hoping I could get some advice on where to look or some recommendation on what the best settings would be for my battery charge settings for my inverter system / solar system.

Currently my setup is as follows.

  • Victron Smart Solar MPPT 150 | 100 - Tr
  • Victron Venus GX
  • Victron Smart Shunt 500A/50mV
  • Victron Multiplus ii | 48v / 3000 /  35A
  • 8x 12v 800A Solsave Silicone Batteries

https://batterydistributors.co.za/wp-content/uploads/2018/06/Solsave-Silicone-Power-Battery-Datasheet.pdf

 

The batteries are setup in a 48V configuration with 2 Banks in parallel of 4 batteries in series. The system is connected to AC for a battery backup solution for my office.

 

There are fuses, breakers, disconnect switches, 48 - 12V DC-DC inverter, 12V fuse box and 12V components like 3G modem also in the system. But I don’t belive that affects my question on Battery settings.

Sorry I don’t have a diagram but I have not had a chance to draw one up.

 

My questions are

  • What type of batteries are these? I belive they are AGM with some fancy marketing. I cant find much material on what settings can be applied
  • What settings can be reccomended I apply for these, or look for, regarding the Multiplus ii and Smart Solar devices.
    • DC Input Low Shutdown
    • DC Input Low Restart
    • DC Input
    • Absorption Voltage
    • Float Voltage
    • Charge Current
    • Repeated Absorption Time
    • Repeated Absorption Interval
    • Maximum Absorption Time

 

 

Currently the system is just on the default settings.  Though a lot of people indicate the Victrron system has a good default setup for AGM batteries I would like to ensure that I dont damage these batteries learning an expensive lesson down the line on correct settings for the batteries.

I cant seem to find a good resource indicating what ae best practices,settings or breakdowns for diffrent  battery types. A lot of people indicate that this should be found with the data sheets for the batteries but as you can see from the link provided this does not appear to be clear with this type of battey.

 

Any advice or reccomendations would greatly be apprecaited.

Edited by Paul0
Grammer
Posted

It seems it could be AGM. What is strange is that no document indicates a 12V 800Ah battery. Their 800Ah cells are 2V.

They do state float at 2.25V per cell and bulk at 2.45V.

Does your reference to 800A mean 8 x 100Ah?

Contact the seller as per the link you provided for settings.

Posted (edited)

The Solsave Silicone Power Battery

Patented – Silicone Electrolyte Characteristics:
Our unique silicone electrolyte does not corrode the internal plates of the batteries...

So, not AGM, it seems... since the solsave.com domain seems to have expired, it might indicate that the battery manufacturer has also disappeared...

The top charge voltage recommended is 2.6V/cell... and I saw 2.25V/cell float charge... which would be 62.4V top charge and 54V float... and presumably don't go lower than 1.8V/cell, thus 43.2V minimum cutoff...

Edited by Kalahari Meerkat
Posted
5 hours ago, Kalahari Meerkat said:

The Solsave Silicone Power Battery

Patented – Silicone Electrolyte Characteristics:
Our unique silicone electrolyte does not corrode the internal plates of the batteries...

So, not AGM, it seems... since the solsave.com domain seems to have expired, it might indicate that the battery manufacturer has also disappeared...

The top charge voltage recommended is 2.6V/cell... and I saw 2.25V/cell float charge... which would be 62.4V top charge and 54V float... and presumably don't go lower than 1.8V/cell, thus 43.2V minimum cutoff...

The 2.25V float mentioned and 2.45V bulk I found on a document relating to these batteries as well as the list of different battery sizes they made. I did not check what the Web page addy was.

IMG_20220424_160329.thumb.jpg.ff3affc27d9e8ae49a14d520e8f5cf12.jpg

Posted
On 2022/04/24 at 9:05 AM, Scorp007 said:

It seems it could be AGM. What is strange is that no document indicates a 12V 800Ah battery. Their 800Ah cells are 2V.

They do state float at 2.25V per cell and bulk at 2.45V.

Does your reference to 800A mean 8 x 100Ah?

Contact the seller as per the link you provided for settings.

Yes apologies I meant it to say 8 x 100Ah. I see I wrote 8x 800Ah.

 

 

Posted
On 2022/04/24 at 10:33 AM, Kalahari Meerkat said:

The Solsave Silicone Power Battery

Patented – Silicone Electrolyte Characteristics:
Our unique silicone electrolyte does not corrode the internal plates of the batteries...

So, not AGM, it seems... since the solsave.com domain seems to have expired, it might indicate that the battery manufacturer has also disappeared...

The top charge voltage recommended is 2.6V/cell... and I saw 2.25V/cell float charge... which would be 62.4V top charge and 54V float... and presumably don't go lower than 1.8V/cell, thus 43.2V minimum cutoff...

Thanks so much. 

"The top charge voltage recommended is 2.6V/cell."  - I believe this is if we are maxing out the charge capacity though, no?

Where did you see the float voltage?

 

21 hours ago, Scorp007 said:

The 2.25V float mentioned and 2.45V bulk I found on a document relating to these batteries as well as the list of different battery sizes they made. I did not check what the Web page addy was.

IMG_20220424_160329.thumb.jpg.ff3affc27d9e8ae49a14d520e8f5cf12.jpg

There seems to be a disagreement about the bulk charges.

 

Looking at this graph it seems to show that 2.5v per cell is 100% charge.

image.thumb.png.6558ed1c12b863d12375fb27f1561378.png

 

 

Posted

So some fo the settings should maybe be.

  • DC Input Low Shutdown - 43.2v (Possibly set a little higher at 45v to be safe?)
  • DC Input Low Restart - 45v or 47v
  • DC Input - 62.4v (Possibly set a little lower 61v to play it safe?)
  • Float Voltage - 54v

 

That leaves me with these settings that im not sure about.

  • Absorption Voltage
  • Charge Current
  • Repeated Absorption Time
  • Repeated Absorption Interval
  • Maximum Absorption Time
  • 2 weeks later...
Posted

So I spoke to another manufacturer of a similar spec battery type. Their engineers came back to me with these settings which I have applied to my system

 

  • DC Input Low Shutdown 46V
  • DC Input Low Restart  50V
  • DC Input  57.4V - 57.6V
  • Absorption Voltage  57.4V-  57.6V
  • Float Voltage 54V - 54.2V
  • Charge Current 40A(0.2CA)
  • Repeated Absorption Time   12H
  • Repeated Absorption Interval   90DAYS
  • Maximum Absorption Time12-14H

 

I feel happy with these figures. Not sure if anyone feels there is something that should be changed here. Any input is welcome.

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