Stecamat 821

Processor-controlled charger for lead batteries


The Stecamat 821 battery charger is available in a lightweight, compact housing. The battery is charged gently and quickly by the processor-controlled charging process. To customise the current, voltage, time and ideal monitoring of the battery, the Stecamat 821 battery charger offers a choice of fixed battery profiles and the possibility to enter new battery profiles. This also allows for pre-damaged or deeply discharged batteries to be treated, making a long service life possible with the Stecamat 821. A backlit display provides quick information about the charging status.
The extensive equipment ensures maximum flexibility in use. This equipment and the easy operation ensure seamless operation.

Stecamat 821 technische Zeichnung


Product features

  • Besides preset battery profiles there is the option of entering new battery profiles
  • Half the charging time compared to simple, non-controlled chargers with the same rated current
  • Optimal for charging batteries with liquid electrolyte and gel / absorbed electrolyte (AGM)
  • Adjustable rated capacity determines the charging current
  • Suitable for totally discharged batteries
  • Constant battery operational readiness through integrated trickle charge
  • Ready for operation in just a few minutes
  • Charging below the gassing voltage
  • Optimal charging of damaged batteries

Electronic protection functions

  • Protection in the case of wrong or damaged batteries
  • Battery overcharge protection
  • Charger output protected against short circuits, reverse polarity and overvoltage


  • Multifunction graphical LC display with backlighting
  • for voltage, current, charged capacity, charging phase, menu


  • Four cursor buttons for menu selection


  • Control contact for ventilation control system in accordance with DIN EN 50272


  • IO box with mains plug and relay for ventilator control


  •  Stecamat 821 certificate CE · pdf · 0.832 MB
  •  Stecamat 821 productdatasheet DE · pdf · 0,968 MB
  •  Stecamat 821 productdatasheet EN · pdf · 0.968 MB
  •  Stecamat 821 manual DE · pdf · 3.262 MB
  •  Stecamat 821 manual EN · pdf · 3.261 MB
  •  Stecamat 821 product pic drawing · jpg, 300 DPI, high quality · 0.773 MB
  •  Stecamat 821 product pic drawing · jpg, 72 DPI, web quality · 0.403 MB

Technical data

Charging rated voltage
12 V
24 V
48 V
Charge current
50 A
35 A
18 A
End-of-charge voltage
14.4 V
28.8 V
57.6 V
Trickle charge voltage
13.8 V
27.6 V
55.2 V
Characteristic curve
Grid voltage
230 V AC ±10 %
Frequency range
50 Hz (45 Hz … 65 Hz)
Mains electricity (230 V)
3.7 A
5.5 A
5.5 A
Discharge current during grid failure
1.0 mA
Protection class
Degree of protection
IP 20
Ambient temperature
-20 °C … +60 °C
Cooling principle
regulated fan
Dimensions (X x Y x Z)
248 x 429 x 128 mm
6.0 kg
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