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Our 6 store locations may sell for less if you are able to pick up your battery.
For Dealer and volume purchase enquirers CLICK HERE.
All requests for quotation will be processed within 24hrs eastern standard time, please indicate part, quantity required and your shipping destination commercial quotations.
* Includes shipping to any Canadian provinces except Quebec and the Territories, please contact online for shipping information to those locations.
The BMS 12/200 lets you safely connect any size 12V alternator (and start battery) to Victron LiFePO4 Smart Batteries. This all-in-one Battery Management System, Current Limiter, Battery Combiner and Battery Protector is a robust and compact solution, specifically designed for 12V systems with 12V alternators, such as vehicles and boats.
The BMS 12/200 monitors and protects each individual battery cell within the battery (or battery bank) and will disconnect the alternator, charge sources or DC loads in case of low battery voltage, high battery voltage or over temperature.
The dedicated alternator connection provides current limiting and one-way traffic from the alternator into the battery, this so any size alternator (and start battery) can be safely connected to the Smart Lithium battery or batteries and the starter battery is protected from excessive discharge.
The dedicated load connection will disconnect loads and charge in case of low battery voltage, high battery voltage or over temperature.
The BMS is also equipped with a remote on/off connector, to turn the BMS (and the system) off via a remote switch.
Why a Battery Management System (BMS) is needed:
- A LFP cell will be damaged if the voltage over the cell falls to less than 2,5V.
- A LFP cell will be damaged if the voltage over the cell increases to more than 4,2V.
Lead-acid batteries will eventually also be damaged when discharged too deeply or overcharged, but not
immediately. A lead-acid battery will recover from total discharge even after it has been left in discharged state
during days or weeks (depending on battery type and brand).
- The cells of a LFP battery do not auto-balance at the end of the charge cycle.
The cells in a battery are not 100% identical. Therefore, when cycled, some cells will be fully charged or
discharged earlier than others. The differences will increase if the cells are not balanced/equalized from time to
time.
In a lead-acid battery a small current will continue to flow even after one or more cells are fully charged (the main
effect of this current is decomposition of water into hydrogen and oxygen). This current helps to fully charge
other cells that are lagging behind, thus equalizing the charge state of all cells.
The current which flows through a fully-charged LFP cell however, is nearly zero, and lagging cells will therefore
not be fully charged. Over time the differences between cells may become so extreme that, even though the
overall battery voltage is within limits, some cells will be destroyed due to over- or under voltage.
A LFP battery therefore must be protected by a BMS that actively balances the individual cells and prevents
under- and over-voltage.
| BMS 12/200 specification |
| Maximum number of 12,8V batteries |
10 |
| Maximum charge current, Power Port AB |
80A @ 40°C |
| Maximum charge current, Power Port LB |
200A @ 40°C |
| Maximum continuous discharge current, LB |
200A @ 40°C |
| Peak discharge current, LB (short circuit proof) |
400A |
| Approximate cut-off voltage |
11V |
| GENERAL |
| No load current when operating |
10mA |
| Current consumption when switched off (discharging is stopped and charging remains enabled, both through AB and LB, when switched off) |
5mA |
| Current consumption after battery discharge cutoff due to low cell voltage |
3mA |
| Operating temperature range |
-40 to +60°C |
| Humidity, maximum |
100% |
| Humidity, average |
95% |
| Protection, electronics |
IP65 |
| DC connection AB, LB and battery minus |
M8 |
| DC connection battery plus |
Faston female 6.3mm |
| LEDs |
| Battery being charged through Power Port AB |
green |
| Battery being charged through Power Port LB |
green |
| Power port LB active |
green |
| Over temperature |
red |
| ENCLOSURE |
| Weight (kg) |
1,8 |
| Dimensions (hxwxd in mm) |
65 x 120 x 260 |
| STANDARDS |
| Emission |
EN 50081-1 |
| Immunity |
EN 50082-1 |
| Automotive Directive |
2004/104/EC |
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