The SureSine™ is a pure sine wave inverter delivering AC power in off-grid solar applications, including rural electrification, telecom, remote homes, RVs, caravans and boats. A cast, anodized aluminum enclosure with no internal cooling fan needed ensures long-term reliability in the harshest conditions. The SureSine’s combination of performance, features and competitive price provides the best small inverter value on the market. It is highly reliable, having no internal cooling fan or other moving parts prone to failure.
They’re worth it, because they provide the faster power “tracking” that lets us engineer this much power and control into a compact design.
Combined with premium, “over-spec’d” components, this greatly improves control response which guards against system transients, regulation overshoot and overcurrent/overload conditions
Nature do your worst–this controller can take it
If you’ve ever trashed a lesser terminal during an installation, you’ll appreciate some “overkill” here
Allows the surface-mounting of critical components underneath the main board next to the heat sink, which reduces heat travel distance and keeps the controller even cooler
As opposed to cast aluminum, which is less effective in passive cooling applications
“Talks solar” with standard industry language, for system monitoring and cloud connectivity-speaks Modbus, and SNMP (with the EMC-1)
Lithium batteries are expensive and vulnerable to cold temperatures. When it gets close to freezing, the controller backs-off charging to avoid damaging batteries
All-digital calibration for high accuracy, using the same efficient technology found in advanced mobile device
Morningstar’s hallmark MPPT technology precisely seeks and locks onto the true maximum power point quickly and accurately, to ensure the highest output possible from a solar array
When you’ve been in the field installing, you appreciated being able to read a crisp, high contrast display on site
Up to 2 1/2 times longer than some competitors in this class
ProStar is smart enough to monitor and analyze system performance, and alert you when you need to know
Heat is the enemy of all electronics. That’s why Prostar’s critical components are rated to withstand temperatures right up to the boiling point of water (100°C)
Protects the precision electronics inside with an impact strength 30 times greater than the acrylic thermoplastics commonly found on lesser controllers
Just kidding. We’ve never needed them
|Model||SI-300-115V-UL (60 Hz)||SI-300-220V (50 Hz)|
|Continuous Power Rating||300 Watts @ 25C||300 Watts @ 25C|
|Pek Power Rating (15 min.)||600 Watts @ 25C||600 Watts @ 25C|
|DC Input Voltage||10.0V - 15.5V||10.0V - 15.5V|
|Waveform||Pure sine wave||Pure sine wave|
|AC Output Votage (RMS)||220V or 115V +/– 10%||220V or 115V +/– 10%|
|AC Output Frequency||50 or 60 Hz +/– 0.1%||50 or 60 Hz +/– 0.1%|
|Nominal Battery Voltage||12V||12V|
|Total Harmonic Distortion (THD)||<4%||<4%|
|Self Consumption (Inverter ON - no load)||450mA||450mA|
|Self Consumption (Inverter OFF)||25mA||25mA|
|Self Consumption (Standby)||55mA||55mA|
|Operating Temperature Range||-40 C to +45C||-40 C to +45C|
|Warranty||5 Years||5 Years|
|CE and RoHS compliant||Yes||Yes|
|ETL Listed [UL-458]||Yes|
|FCC Class B Part 15 Compliant||Yes||Yes|
|Manufactured in a Certified ISO 9001 Facility||Yes||Yes|
This 5 minute video highlights the ProStar MPPT solar charge controller’s circuit board that differentiates it from other brands. In addition to the capacitors, inductors, processors, surge protectors, and other over-spec’d internal components, the quality of the controller’s heat sink and outer casing is also addressed. The video concludes with mention of features and capabilities related to communications, datalogging, lithium battery charging, and high quality and reliability.
It’s a recommended best practice to install your product’s latest firmware to ensure access to all up-to-date features, accessory compatibilities, and code modifications. Watch this 5 minute video for instructions on how to download and update ProStar MPPT firmware.
After watching the video, click here to download the firmware.
The schematic diagram above, illustrates how the ProStar MPPT regulates power to batteries and a direct current (DC) load in an off-grid system.
The schematic diagram above, illustrates how the ProStar MPPT regulates power to batteries and an alternating current (AC) load in an off-grid system. This diagram is very similar to the DC load diagram above it except an inverter has been added.