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HEKO Solar Master 300 Portable Power Station

Model: Master 300 · SKU: ADVANCE 300B

Prepared Nov 5, 2026

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Common specifications

Rated capacity	0.23 kWhCalculatedSource [1]
Usable capacity	Not documented
Battery voltage	Not documented
Rated capacity	Not documented
Continuous output	Not documented
AC output voltage	230 VSource [1]
Maximum AC charging	Not documented
PV input limit	Not documented
Transfer time	Not documented
Continuous discharge current	Not documented
Continuous charge current	Not documented
Peak discharge current	Not documented
Timed peak output	Not documented
Dimensions	142 W × 148 H × 192 L mm5.59 W × 5.83 H × 7.56 L in convertedSource [1]
Weight	2.76 kg6.08 lb convertedNeeds confirmationSource See note below[1]
Communications	Not documented
Terminals	Not documented
Enclosure	Not documented
Chemistry	Not documented
Cycle life	Not documented
Solar input voltage	Not documented
MPPT voltage range	Not documented
Maximum PV voltage	Not documented
AC charge input	Not documented
Enclosure volume	4.04 L** Calculated from recorded external dimensions
Warranty term	Not documented

All recorded specifications

AC output voltage	230 VDocumented claim Conditions Printed as "230V~50Hz". Location: Dutch general specifications, Stopcontact Printed as "230V~50Hz". Location: Dutch general specifications, Stopcontact Official user manual · Master 300 (ADVANCE 300B) user manual (English and Dutch), HEKO Solar [1]
Battery capacity	231 WhDocumented claim Conditions Printed as "Lithium Battery 231Wh (22.2V, 10.4Ah)" (English); the Dutch page prints "Capaciteit 231Wh (14.8, 15.6)". The Wh figure agrees; the voltage and Ah do not, so neither is recorded. Location: English general specifications, Battery Capacity Printed as "Lithium Battery 231Wh (22.2V, 10.4Ah)" (English); the Dutch page prints "Capaciteit 231Wh (14.8, 15.6)". The Wh figure agrees; the voltage and Ah do not, so neither is recorded. Location: English general specifications, Battery Capacity Official user manual · Master 300 (ADVANCE 300B) user manual (English and Dutch), HEKO Solar [1]
Charging temperature	0 to 40 °C32 to 104 °F convertedDocumented claim Conditions Charging temperature printed as "32 to 104°F (0 to 40°C)". Location: English general specifications, Charging and Discharging Temperature Charging temperature printed as "32 to 104°F (0 to 40°C)". Location: English general specifications, Charging and Discharging Temperature Official user manual · Master 300 (ADVANCE 300B) user manual (English and Dutch), HEKO Solar [1]
Dimensions	142 W × 148 H × 192 L mm5.59 W × 5.83 H × 7.56 L in convertedDocumented claim Conditions Printed as "L192 x W142 x H148 mm". Location: English general specifications, Dimensions Printed as "L192 x W142 x H148 mm". Location: English general specifications, Dimensions Official user manual · Master 300 (ADVANCE 300B) user manual (English and Dutch), HEKO Solar [1]
Discharging temperature	-10 to 40 °C14 to 104 °F convertedDocumented claim Conditions Discharging temperature printed as "14 to 104°F (-10 to 40°C)". Location: English general specifications, Charging and Discharging Temperature Discharging temperature printed as "14 to 104°F (-10 to 40°C)". Location: English general specifications, Charging and Discharging Temperature Official user manual · Master 300 (ADVANCE 300B) user manual (English and Dutch), HEKO Solar [1]
Rated AC output	300 WDocumented claim Conditions Printed as "Stopcontact 1 x 230V~50Hz 300W, 450W piek" (one outlet, 300 W, 450 W peak). Not stated as continuous. Location: Dutch general specifications, Stopcontact Printed as "Stopcontact 1 x 230V~50Hz 300W, 450W piek" (one outlet, 300 W, 450 W peak). Not stated as continuous. Location: Dutch general specifications, Stopcontact Official user manual · Master 300 (ADVANCE 300B) user manual (English and Dutch), HEKO Solar [1]
Rated capacity	0.23 kWhCalculated231 Wh / 1000 = 0.231 kWh Conditions Printed as 231Wh. Location: English general specifications, Battery Capacity Printed as 231Wh. Location: English general specifications, Battery Capacity Official user manual · Master 300 (ADVANCE 300B) user manual (English and Dutch), HEKO Solar [1]
Surge AC output	450 WDocumented claim Conditions Printed as "450W piek" (peak). Location: Dutch general specifications, Stopcontact Printed as "450W piek" (peak). Location: Dutch general specifications, Stopcontact Official user manual · Master 300 (ADVANCE 300B) user manual (English and Dutch), HEKO Solar [1]
USB c port power	100 WDocumented claim Conditions The second USB-C port is printed as "5V-3A, 9V-3A, 12V-3A, 15V-3A, 20V-5A, 100W Max"; the first USB-C port prints 30W Max. Location: Dutch general specifications, USB-C poort (2) The second USB-C port is printed as "5V-3A, 9V-3A, 12V-3A, 15V-3A, 20V-5A, 100W Max"; the first USB-C port prints 30W Max. Location: Dutch general specifications, USB-C poort (2) Official user manual · Master 300 (ADVANCE 300B) user manual (English and Dutch), HEKO Solar [1]
Weight	2.76 kg6.08 lb convertedNeeds confirmationThe English specifications print 6.08 lbs (2.76 kg); the Dutch specifications of the same manual print "Gewicht 2.8 kg". Conditions Printed as "6.08 lbs (2.76 kg)" in English. Location: English general specifications, Weight Printed as "6.08 lbs (2.76 kg)" in English. Location: English general specifications, Weight Official user manual · Master 300 (ADVANCE 300B) user manual (English and Dutch), HEKO Solar [1]

Warranty

Certificate records

No records documented.

Sources and revisions

Master 300 (ADVANCE 300B) user manual (English and Dutch), HEKO SolarOfficial user manual · Checked Oct 30, 2026https://cdn.shopify.com/s/files/1/0956/3268/7435/files/Manual_Advance300B_-_Master_300_EN_NL.pdf?v=1758738751
Producthandleidingen (product manuals), HEKO SolarOfficial instruction manual · Checked Oct 30, 2026https://hekosolar.com/pages/producthandleidingen