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This will depend on your panel wattage, your battery watt-hour (Wh) capacity (a measurement of storage capacity) and the weather. A 150 Wh battery will charge faster than a 500 Wh battery because the 500 Wh battery has more storage capacity, therefore requiring more time to fully charge. In addition, a 100-watt panel will charge a battery faster than a 50-watt panel exposed to the same amount of sunlight.

Charging time will be affected by weather, shade, time-of-day, age and use of battery, efficiency of the charge controller, placement of the solar panels, and other operational factors. Be sure to look on your solar-compatible battery for an estimate of charging times as well as panel-wattage compatibility, and always check the charging characteristics of the battery to ensure it’s compatible with the wattage of the panel.

For higher battery capacity (greater than 150 Wh) we recommend using a 100-watt panel. Before doing this, however, please ensure that the battery you are charging is compatible with this wattage and use a compatible charge controller.

We built the Performance solar panels for high reliability, high efficiency and low degradation—driving an estimated 8% more energy yield in a fixed space over the first 30 years of operation when compared to Conventional mono PERC Panels1.

PV solar panels produce direct current (DC) electricity, where electrons flow in a single direction, like a battery powering a light bulb. In contrast, alternating current (AC) electricity alternates the electron flow, similar to a car engine's movement. AC electricity is generated by spinning a coil of wire near a magnet, powered by various energy sources like gas, hydro, nuclear, coal, wind, or solar.

SunPower Performance solar panels combine conventional cells with SunPower's 39 years of materials and manufacturing expertise. This results in panels that surpass the performance, reliability, and aesthetics of conventional panels. The innovative shingled cell design, conductive adhesives developed for aerospace, and proprietary encapsulants all contribute to enhanced reliability and performance.

The amount of energy produced by solar panels depends on several factors, including the size and efficiency of the panels, the amount of sunlight they receive, and their orientation and location. On average, a 1-kilowatt (kW) solar panel system can generate approximately 1,600 to 2,500 kilowatt-hours (kWh) of electricity per year in a location with good sunlight.

SunPower Maxeon panels also deliver greater peace of mind, having earned the trust of experts by being more reliable and durable - and backed by our industry-leading Complete Confidence Warranty. Not only is this warranty stronger, but unlike most conventional warranties, it is based on actual field-testing data. For example, the power warranty promises no more than a 0.25%/ year power drop. This is backed by a study of more than 230MW across 149 actual global sites using a methodology developed in collaboration with NREL. We also know from actual field data that only 0.005% or 1 in 20,000 SunPower Maxeon panels have been returned under warranty4 .Lastly, SunPower Maxeon panels are built with our customers in mind, which means higher sustainability standards and more elegant design aesthetics than Conventional Panels. SunPower Maxeon panels have pioneered sustainability efforts in solar manufacturing, and have been recognized with the prestigious Cradle to Cradle Certified™ designation for direct current (DC) panels. The Cradle to Cradle designation demonstrates the products' quality based on rankings of material health, material reutilization, renewable energy use, water stewardship, and social fairness.

SunPower Maxeon panels were also the first solar panel to disclose its ingredients through the Declare label. In March 2020, our Mexicali, Mexico manufacturing facility was re-certified by NSF Sustainability as Zero Waste to Landfill – and remains the only solar panel manufacturing facility to achieve this. The certification means that this facility diverts more than 99% of its waste, with 1% or less going to landfills.

The back-contact cell design of SunPower Maxeon panels also delivers an uncluttered and elegant design aesthetic – with panels available in black and white backsheets. This has made SunPower Maxeon panels the panel of choice for architects and designers.