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Morningstar SureSine 300 W Pure Sine Wave Inverter, 12 V, 120 V 60 Hz, Type B Outlet (SI-300-12-120-60-B)

Brand
Morningstar
Model
SI-300-12-120-60-B
SKU / part number
SI-300-12-120-60-B[1]
Category
Inverters
chargedreviews.com/inverters/morningstar-si-300-12-120-60-b

AC output

Continuous output0.3 kW[1]Calculated
Peak output600 W (< 5 sec); 450 W (1 min); 360 W (3 min); at 40°C[1]
AC configuration?
AC output voltage120 V[1]
AC frequency60 Hz[1]
Grid pass-through?
Maximum output per leg?

Battery

Battery voltage12 V[1]
Battery voltage range10 to 16.5 V[1]
Maximum charge current?
Maximum discharge current36 A[1]
Battery-only output?
Maximum grid charging?
Compatible batteries / BMS?

PV input

PV array limit (connected)?
PV input limit (converted)?
Maximum PV voltage (Voc)?
MPPT voltage range?
MPPT trackers?
String inputs per MPPT?
PV current per MPPT?
PV short-circuit current?
PV startup voltage?

Efficiency and modes

Peak efficiency91 %[1]
CEC weighted efficiency?
Battery conversion efficiency?
Grid / off-grid modes?
Generator input?
Transfer time?
Idle consumption3.9 W[1]
Standby consumption0.65 W[1]
Parallel units?

Communication and environment

CommunicationsRS485; MS-CAN; Bluetooth[1]
Operating temperature-40 to 60 °C[1]
Enclosure ratingIP20[1]
Operating noise?

Mechanical

Dimensions332 D × 190 D × 96 D mm[1]
Weight5.7 kg / 12.57 lb[1]Calculated

Installation (from the manual)

Not documented in the manual

Page 1 of 2 · Installation values · ? means nothing is recordedAggregated, often community-reported information, not official documentation. Do not rely on it for installation, purchase or compliance decisions; always confirm values with the manufacturer’s official documentation. Charged Reviews accepts no responsibility for errors.

Charged Reviews · Quick reference

Morningstar SureSine 300 W Pure Sine Wave Inverter, 12 V, 120 V 60 Hz, Type B Outlet (SI-300-12-120-60-B) · SI-300-12-120-60-B

Warranty

Warranty term5 years[1]
Optional extension?
Coverage starts?
Coverage conditions?
Remedy?
Labor and shipping?
Transfer to another owner?
Registration?
Territory?

Certifications and listings

UL 1741?
UL 1741 SA?
UL 1741 SB?
IEEE 1547?
CA Rule 21?
UL 9540?
FCC Part 15?

Documents and sources

  1. Morningstar SureSine Inverter Line datasheet (MS-003710 07-26-2023) (November 2, 2026 capture)Official datasheet · Revision MS-003710 07-26-2023 · Revised Not stated · Checked https://www.morningstarcorp.com/wp-content/uploads/datasheet-suresine-en.pdf