Pro-Aqua 750

A robust, waterproof battery charger for any lithium battery designed to charge safely and effectively up to 800W output with electronic protection against short circuit, reverse polarity connection and deeply discharged batteries.

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The Pro-Aqua 750 microprocessor-controlled IP-65 lithium battery charger was specifically developed for harsh conditions where water may be present. With the automatic 4-step charging program the battery pack will be charged safely. The output of the charger is electronically protected against short circuit and reverse polarity connection. The charger is able to recover over discharged batteries. Four LED’s on the top case are used to indicate charging status and errors.

1. Phase (Pulsing) 2. Phase (CC1) 3. Phase (CC2) 4. Phase (CV) Auto Restart
Auto Wake-up Soft-start Constant Current Constant Voltage At a pre-set number of days or voltage level
Charge Voltage max. Nominal Voltage ~70% Nominal Voltage Nominal Voltage Nominal Voltage
Charge Current max. 50% |max 50% |max |max |max
Charge Current min. 25% |max 25% |max 50% |max 10% |max
Trigger Criterion for next Phase E.g 3.0V/cell (10 cycles) E.g Ubat ≥ 2.5V/cell / timer 4h E.g. Ubat ≥ Umax / timer 20h E.g. Ib < Imin / timer 8h

Special Features Include:

  • Passive cooled IP65 aluminum housing
  • Short circuit and reverse polarity protection
  • LED’s to indicate operation and charging status
  • 4-step charging technology with automatic restart charging
  • Automatic shut-off at high temperatures
  • Indication of charging problems through the ‘error’ LED

Optional Features Include:

Customer specific output and input connectors can be supplied and fitted, please contact our Exegon sales team today on 01225 791805 with your requirements.

Technical Specifications


Model 7S 25A – SLK750CH
Charge Characteristic 4-Step charge profile
Input 180-240V AC 50/60Hz
AC Cable 1.3m ±0.1m 32A (plug type as per listed part no.)
Charging Current Max. 25A
Minimum Battery Voltage Over discharged battery recovery system
Charging Voltage Nom. 29.4V
Restart Charging Voltage 28.4V
Power Consumption 800W Max
Back Current <1mA
Efficiency >86%
DC-Cable Length: 1.2m ±0.1m 32A DC plug fitted
Indicators 4 LED’s
Cooling Passive cooled
Operating Temperature Range -10° – +40°
Device Protection Over temperature, reverse popularity, short circuit & overload
Temperature sensor Internal. Over temp protection
Certification CE. UKCA
Enclosure Black aluminum housing
IP Rating IP65


Output Dimensions L X W X H (mm) Weight (kg)
7S 25A 240 x 2000 x 90 4.45

Mounting Plate Dimensions

4 x 6mm holes, 178mm x 215mm

Additional information


Pro-Aqua 750

Data Sheets

Pro-Aqua 750

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Why choose Exegon?

35 Years' Industry Experience

The Exegon team have been continually developing new products to meet and exceed our customer’s requirements for over 35 years.

British Manufacturer - In House Design and Development

Exegon is a British company delivering high quality, British designed and manufactured products nationwide and abroad.

Technical Expertise – Continually developing innovative solutions

Our in-house technical team’s in-depth knowledge of battery chargers and charging solutions enables us to develop innovative and bespoke solutions to meet customers requirements.

Quality Products – supported by ISO 9001: 2015 accreditation

Exegon’s Business Management System is accredited to the ISO 9001:2015 standard helping to ensure we delivery high quality products to our customers.

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