This is not a quality difference, but a function of prevalent solar conditions and location considerations.
- Because MPPT (maximum power point tracking) controllers convert extra solar electricity voltage into useable electricity, they are ideal for areas where seasonal, weather and shading conditions cause wide variations in solar “harvesting.” Morningstar’s proprietary TrackStar™ MPPT technology is considered the industry’s performance standard. Because of their additional circuitry on-board, MPPT controllers are also more complex and expensive.
- PWM (pulse-width modulation) controllers are the right choice for systems using 36 or 72-cell solar-panels in locations with consistent sunlight, minimal shading and no physical space limitations—such as at the top of light poles, for example. PWM controllers are simpler and cost effective as a result.
All Morningstar charge controllers, regardless of their technology or design, built to one industry-leading quality standard. They all have “over-spec’d” components, incorporate advanced electronic design and thermal engineering, and have no cooling fans to fail—unlike all the in-kind competition. Because of this, over four million Morningstars have been sold since 1993 and are the first choice for leading solar installers in mission-critical installations around the globe.