The Mastervolt ChargeMaster 24/12-3 is a battery charger with 12 A at 26.5 V of charging current, a weight of 1.8 kg 4.0 lb, a supply of 120/230 V (90-265 V), 50/60 Hz and an ingress rating of IP23.
Last updated: 8 October 2026
Battery and charging
- What it draws on standby
- < 2 mA
- Temperature compensation
- yes
- Input voltage
- 120/230 V (90-265 V), 50/60 Hz
- Output current
- 12 A at 26.5 V
- Charging voltage
- 28.5 V
- Float voltage
- 27.6 V
“Power consumption (DC side) < 2 mA”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
“Temperature compensation yes”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
“Nominal input voltage 120/230 V (90-265 V), 50/60 Hz”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
“Total charge current 12 A at 26.5 V”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
“Charge voltage Absorption 28.5 V”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
“Charge voltage Float (Gel/AGM batteries) 27.6 V”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
Battery care and safety
- Operating temperature range
- -25 °C to 60 °C, derating < 0 °C and > 40
- Ingress protection
- IP23
“Temperature range (ambient temp.) -25 °C to 60 °C, derating < 0 °C and > 40”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
“Protection degree IP23”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
Size and fit
- Overall dimensions
- 234 x 132 x 60 mm 9.2 x 5.2 x 2.4 inch
- Stated weight
- 1.8 kg 4.0 lb
“Dimensions, hxwxd 234 x 132 x 60 mm 9.2 x 5.2 x 2.4 inch”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
“Weight 1.8 kg 4.0 lb”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
Other findings
- Battery bank size
- 24-120 Ah
- Charge characteristic
- IUoUo, automatic 3-step+ for gel/AGM/wet/Lithium Ion
- Nominal output voltage
- 24 V
- Number of battery outputs
- 3
“Battery bank size 24-120 Ah”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
“Charge characteristic IUoUo, automatic 3-step+ for gel/AGM/wet/Lithium Ion”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
“Nominal output voltage 24 V”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
“Number of battery outlets 3”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
Certification claims
- Product compliance claim
- CE, ABYC A-31, SAE J1171/ISO 8846 ignition protected, RRR, RMRS
“Compliance CE, ABYC A-31, SAE J1171/ISO 8846 ignition protected, RRR, RMRS”
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
Sources
- Archived document
Source: mastervolt.com/products/chargemaster-24v/chargemaster-24-12-3
Retrieved October 8, 2026