HA01 Battery equaliser for 12v batteries ideal for small solar backup

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HA02 Equaliser1

Model: HA01

Product Code: HA01

Availability: In Stock

HA01 Battery equaliser for 12v batteries ideal for small solar backup. This 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 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 increase over time and subsequent charging cycles. This will result in premature failure of the batteries. 

HA01 battery balancer is an energy transfer type equaliser.

That means that the equaliser starts to work when there is a  20mV difference between the two batteries. The voltage difference will cause current to flow from a higher voltage battery to the lower voltage, eventually reaching equilibrium. It can be permanently connected to the battery system to keep the system voltage balanced automatically and requires no maintenance. 

One equaliser connects 2 batteries in series and can be connected with batteries in parallel for larger capacity balancing. 

Several equalisers can be connected in series for larger voltage balancing. Battery equaliser can be used for 24V, 36V, 48V and any other 

N*12V battery system.

1 piece for 24V system; 

2 pieces for 36V system;

3 pieces for 48V system;

Battery equaliser for 12v batteries ideal for small solar backup3

 Battery balancing explained here in a youtube video: https://www.youtube.com/watch?v=0KSFitqvap0 


Battery nominal voltage: 2*12V 

Optimising current: 0-5A 

Quiescent current : <3mA 

Dimensions: 70*70*27 mm 

Protection: Reverse polarity protection 

Low Voltage Disconnect: 10V


Battery nominal voltage: 2*12V

Optimising current: 0-5A

Quiescent current : <3mA

Dimensions: 70*70*27 mm

Protection: Reverse polarity protection

Low Voltage Disconnect: 10V


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