Paul0 Posted April 22, 2022 Posted April 22, 2022 (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 April 22, 2022 by Paul0 Grammer Quote
Scorp007 Posted April 24, 2022 Posted April 24, 2022 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. Quote
Kalahari Meerkat Posted April 24, 2022 Posted April 24, 2022 (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 April 24, 2022 by Kalahari Meerkat Quote
Scorp007 Posted April 24, 2022 Posted April 24, 2022 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. Quote
Paulo Joaquim Posted April 25, 2022 Posted April 25, 2022 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. Quote
Paulo Joaquim Posted April 25, 2022 Posted April 25, 2022 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. 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. Quote
Kalahari Meerkat Posted April 25, 2022 Posted April 25, 2022 10 minutes ago, Paulo Joaquim said: "The top charge voltage recommended is 2.6V/cell." - I believe this is if we are maxing out the charge capacity though, no? Quote
Kalahari Meerkat Posted April 25, 2022 Posted April 25, 2022 11 minutes ago, Paulo Joaquim said: Where did you see the float voltage? In the graph - Temperature Effect on Floating Charge Life as included by @Scorp007 and also quoted by you afterwards... Quote
Paulo Joaquim Posted April 25, 2022 Posted April 25, 2022 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 Quote
Paulo Joaquim Posted May 4, 2022 Posted May 4, 2022 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. Quote
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