HA12 Equaliser - battery balancer

HA02 Equaliser - battery balancer
HA02 2
HA02 Equaliser2

Model: HA12

Product Code: HA12

Availability: In Stock

HA12 Equaliser - battery balancer 

HA12 Equaliser - battery balancer - The HA12 battery equaliser is used for batteries which are connected in series to keep the voltage of batteries equal when charging or discharging. When connected in series battery voltages will vary due to the differences in cell chemical composition and temperature, each battery’s self discharge rate will  also be different. These differences will cause battery pack to become unbalanced, this imbalance will result in undercharging and overcharging of the batteries resulting in sulfation and premature corrosion of the plates. The voltage difference will increased over time and subsequent charging cycles. This will result in premature failure of the batteries.

The HA12 battery balancer is an energy transfer type equaliser. That means that the equaliser starts to work when there are 10mV difference between two batteries. The voltage difference will cause current to flow from a higher voltage to low voltage,eventually reaching equilibrium. It can be connected to the battery system 24 hours to keep the system voltage balanced automatically and requires no maintenance.

The HA12 battery balancer is suitable for lead-acid batteries(VRLA), lithium iron phosphate batteries(LFP), nickel-cadmium secondary batteries(Ni/CD), and nickel metal hydride secondary batteries(Ni/MH). It works with battery voltages of 6v to 12v giving a battery pack range of 24v to 48v. 

One equaliser can connect 2-4 batteries at a time, if battery pack is less than the 4, the extra cable is left vacant (positive and negative terminal should be insulated). The equaliser can be connected with batteries in parallel for larger capacity balancing. Several equalisers can be connected in series for larger voltage balancing.

Battery Balancing Explained

Watch this YouTube video to see Battery Balancing explained https://www.youtube.com/watch?v=0KSFitqvap0&t=58s


 HA02 Equaliser battery balancer


Battery nominal voltage 

4* (6V/9V/12V)

Optimizing current 


Quiescent current 

5mA(12V)   1.2mA(2.4V)


62*124*27 mm


Reverse polarity protection 

Under voltage lock out 


Marsen Energy Limited Warranty 



This limited warranty (hereinafter “Warranty”) specified below applies to Marsen Energy Chargers. 

1. Purpose 

The primary purpose of this Warranty is to clearly define the matters related to warranty policy of Products. 

2. Warranty Condition 

2-1. Warranty Period 

The Warranty for the Products is valid for 12 months from the purchase date (the “Term of Warranty”). 

2-2. Limitation of Warranty scope 

Marsen Energy’s liability under this Warranty shall be limited to replacement, repair and refund. Replaced or repaired Products shall be warranted for the remainder of the original Term of Performance Warranty. In any event, the replacement shall not justify the renewal of the Term of Performance Warranty. 

2-3. Exclusion of Warranty 

Damage to the Products resulting from any of following activities is NOT covered by this Limited Warranty: 

  • Improper transportation, storage or installation by Buyer 

  • Modification, alteration, disassembly, repair or replace by someone other than personnel certified by Marsen Energy 

  • External influences including unusual physical or electrical stress (Lightning, flood, fire, accidental breakage, etc.) 

  • Connection to incorrect Battery, BMS, PCM or ESC. 

  • Use other than the intended use as outlined in the product description. 

3. Out of Warranty Policy 

Products damage which is not caused by seller, Marsen Energy shall provide charged service, including all the expenses of such as material cost, labor cost, warehouse cost, transportation cost, analysis cost, management cost, corporate profits, disposal expense (If necessary) and so on. 

4. Claim Payment Policy 

Claims under this Warranty must be made by notifying Marsen Energy directly. 

For a Warranty Claim to be processed, it must include following items; 

(1) Proof of the original purchase 

(2) Description of the alleged defect(s)  

(3) The relevant Product’s serial number and the initial installation date 

5. Applicable Law 

The Warranty is subject to the law of Australian State. Products come with guarantees that cannot be excluded under the Australian Consumer Law. The Buyer is entitled to a replacement or refund for a major failure. The Buyer is also entitled to have the goods repaired or replaced if the Products fail to be of acceptable quality and the failure does not amount to a major failure. The benefits to the consumer given by the warranty are in addition to any other rights and remedies of the consumer under a law in relation to the goods or services to which the warranty relates. This warranty only applies to the Buyer who have purchased the Products for their own use