M star mppt 45 suitability on valence lithium cells?

Im running these : valence u27 xp 12 ....
I have 8 cells wired in at 24v 4x 2 cells.
My concern is that of overcharging through the solar ....ie i cant seem to find how to limit the current / voltage accurately on the m star mppt 45s?
Do i need to hook it up to a computer?
Its not too much of an issue here in the UK at wintertime...
Summertime is my concern...
These are 130 ah 12v cells... lightly used and just put back in to service...
I have 8 cells wired in at 24v 4x 2 cells.
My concern is that of overcharging through the solar ....ie i cant seem to find how to limit the current / voltage accurately on the m star mppt 45s?
Do i need to hook it up to a computer?
Its not too much of an issue here in the UK at wintertime...
Summertime is my concern...
These are 130 ah 12v cells... lightly used and just put back in to service...
Comments
Second system 1890W 3 × 300W No name brand poly, 3×330 Sunsolar Poly panels, Morningstar TS 60 PWM controller, no name 2000W inverter 400Ah LFP 24V nominal battery with Daly BMS, used for water pumping and day time air conditioning.
5Kw Yanmar clone single cylinder air cooled diesel generator for rare emergency charging and welding.
I get 3kw of solar in the summer and i just was looking for the simplest method of limiting the end current / voltage going in to these batteries as in summer they will be full quite early in the day...
I have these from low mileage decommissioned electric vans.. i have enough to make another bank on a reserve switch... and some left over.
Just to be clear, those are kWatt*Hours and Amp*Hours? (missing the *Hours part?)
-Bill
My bank is 8x 12v batteries wired as 4 x 24v @ 130ah
Giving 520ah @24v
Batteries are valence u27 12 xp lightly used cells
My concern is setting up the charging correctly ie end amps etc ? Hvd? Lvd?
I have 2 x mstar 45amp mppts
1 xantrex c60 pwm
1 outback 3kw inverter/Charger
Simon
32x90Ah Winston cells 2p16s (48V), MPP Solar PIP5048MS 5kW Inverter/80A MPPT controller/60A charger, 1900W of Solar Panels
modified BMS based on TI bq769x0 cell monitors.
Homemade overall system monitoring and power management https://github.com/simat/BatteryMonitor
MS references this specific model as having the proper DC-DC converter chip inside to power the RS232 circuits
You may find these links helpful
https://www.morningstarcorp.com/morningstar-best-practices-battery-chemistry/ using MS View (it also has latest firmware for controllers in the download archive, update the controller firmware first, then adjust things. READ the instructions or you will BRICK things)
https://senormisterioso.wordpress.com/2017/09/22/programming-a-morningstar-ts-45-to-work-with-battle-born-lipo4-batteries/
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister ,
Thanks mike ive ordered the cable so hopefully i can set up my charger
This statement from their website
"Our battery modules are energy storage devices that can be configured in a variety of ways to meet the particular requirements of an application. To do so requires a properly configured Valence Battery Management System (BMS) for the system parameters and contactors. Generic or non-Valence BMS units are not suitable for use with Valence batteries. For safety reasoning, configuring of a Valence BMS needs to be performed by Valence or its authorized reseller. We do not support Valence products that have not been purchased directly from Valence or through an approved reseller."
and the lack of detailed information about their BMS on the website make me think that you wont get much help from them to get the BMS in the batteries working properly.
What are your plans to implement the two important functions performed by the BMS
- Keeping the individual cells in the individual batteries balanced and the batteries balanced relative to each other.
- Making sure that the cells are kept within their safe operating voltage,temperature and current zones.
Simon32x90Ah Winston cells 2p16s (48V), MPP Solar PIP5048MS 5kW Inverter/80A MPPT controller/60A charger, 1900W of Solar Panels
modified BMS based on TI bq769x0 cell monitors.
Homemade overall system monitoring and power management https://github.com/simat/BatteryMonitor
What is the point of an internal bms if it does nothing?
Is it just if the battery is in single use application?
Any ideas greatly appreciated?Thanks James
I would be interested in any links to information on people using these batteries for DIY.
Have you seen this Youtube video that documents removing the BMS supplied with the battery and installing a Batrium BMS instead? If you can't get the Valence BMS working this is probably the best way to go. Other BMSs that you could look at in place of the Batrium BMS are the Orion Jr and the unit from Zeva Australia
Internal BMSs come in several flavours.
- Fully self contained: where all the circuitry necessary to balance the individual cells and disconnect the battery from the outside world if there is a fault is within the battery case. These batteries are marketed as drop in replacements.
- Self contained but need external circuitry to stop charging or discharging: Same as fully self contained but need to connect to external circuitry or to the charger or load to stop them or disconnect them in the event of fault.
- Master/Slave configurations: Where there is some of the BMS circuitry within the battery that talks to a master controller outside
It is possible that the balancing circuitry within the Valence batteries you have will be able to balance the battery autonomously however this is only the case if the balancing circuitry works by removing charge from the individual cells by placing a load (usually a resistor) across the cell. This is known as passive balancing. The other form of balancing is called active balancing and works by moving charge from one cell to adjacent cells. If the Valence battery uses active balancing the batteries have to be daisy chained together to allow the transfer of charge from one battery to the next.Simon
32x90Ah Winston cells 2p16s (48V), MPP Solar PIP5048MS 5kW Inverter/80A MPPT controller/60A charger, 1900W of Solar Panels
modified BMS based on TI bq769x0 cell monitors.
Homemade overall system monitoring and power management https://github.com/simat/BatteryMonitor
Yes i saw the batrium route conversion video...thanks for that... i haven't looked in to the other ones but i shall...
Many thanks James
As far as i can see
I'm in a similar position, hoping to be able to communicate to the internal BMS of some Valence U27-12XP batteries. Would you be willing to share how you got the software, and what the physical interface was like on the battery? I'm struggling to find that information online.
Thanks!
Zach