The Mastervolt ChargeMaster Plus 24/20-3 is a battery charger with 20 A bij 28,5 V of charging current, a weight of 2.5 kg 5.5 lb, a supply of 120/240 V (80-275 V) 50/60 Hz and an ingress rating of IP23, vertical mounting.
Last updated: 8 October 2026
Battery and charging
- Communications bus
- MasterBus, CZone, NMEA2000
- What it draws on standby
- < 2 mA (MasterBus off)
- Temperature compensation
- -60 mV/°C / -76 mV/°F; incl. temperature sensor
- Input voltage
- 120/240 V (80-275 V) 50/60 Hz
- Output current
- 20 A bij 28,5 V
“Communication interfaces MasterBus, CZone, NMEA2000”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
“Power consumption (DC side) < 2 mA (MasterBus off)”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
“Temperature compensation -60 mV/°C / -76 mV/°F; incl. temperature sensor”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
“Nominal input voltage 120/240 V (80-275 V) 50/60 Hz”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
“Total charge current 20 A bij 28,5 V”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
Battery care and safety
- Operating temperature range
- -25 °C to 70°C, derating > 40 °C, 80% power at 60°C
- Ingress protection
- IP23, vertical mounting
“Temperature range (ambient temp.) -25 °C to 70°C, derating > 40 °C, 80% power at 60°C”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
“Protection degree IP23, vertical mounting”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
Size and fit
- Overall dimensions
- 291 x 210 x 105 mm 11.5 x 8.3 x 4.1 inch
- Stated weight
- 2.5 kg 5.5 lb
“Dimensions, hxwxd 291 x 210 x 105 mm 11.5 x 8.3 x 4.1 inch”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
“Weight 2.5 kg 5.5 lb”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
Other findings
- Battery bank size
- 80-200 Ah
- Charge characteristic
- IUoUo, automatic / 3-step+ for Gel/AGM/flooded/Lithium Ion + user defined option
- Max output current
- 20 A
- Nominal output voltage
- 24 V
- Number of battery outputs
- 3 (max.)
“Battery bank size 80-200 Ah”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
“Charge characteristic IUoUo, automatic / 3-step+ for Gel/AGM/flooded/Lithium Ion + user defined option”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
“Max. output current primary output 20 A”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
“Nominal output voltage 24 V”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
“Number of battery outlets 3 (max.)”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
Certification claims
- Product compliance claim
- CE, CEC, DOE, ABYC, UL1236, cULus, SAE J1171, ISO 8846, ACMA
“Compliance CE, CEC, DOE, ABYC, UL1236, cULus, SAE J1171, ISO 8846, ACMA”
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
Sources
- Mastervolt | Battery chargers | ChargeMaster Plus 24/20-3 | Mastervolt .Archived document
Source: mastervolt.com/products/chargemaster-plus/chargemaster-plus-24-20-3
Retrieved October 21, 2026