SolarTown, 11/24/2010
Review of SOLON Blue 235-watt Solar Module
We generally like the SOLON solar modules. They have a reputation for quality manufacturing and testing techniques, resulting in durable, reliable, and good looking solar arrays. Some SOLON modules are manufactured in the United States and may qualify for ARRA funding.
SOLON has a strange naming convention. The model number for this module is the 220/01 series, but the nameplate is 235 watts. We would hope that SOLON would correct this naming convention for future series.
Cell Type – The SOLON Blue 235 watt module is a 60-cell polycrystalline module. This is not the same module as the SOLON monocrystalline 235 watt module. This poly solar module comes with square 6.14” (156mm) solar cells.
Efficiency – This module carries a 14.3% efficiency rating at 1000W/m2. Efficiency reduces with lower insolation (sunlight), but only up to 5% at 200W/m2. This is slightly higher than the SOLON monocrystalline 235. Monocrystalline panels typically achieve better efficiency levels than equally rated polycrystalline panels, but this poly panel has a slightly higher voltage and current levels than the equally powered SOLON monocrystalline module, making for an efficient, polycrystalline panel.
Appearance – The SOLON Blue module series have a distinct blue hue and the standard silver aluminum frame.
Electrical Data – The 235/01 has an STC rated power of 235 watts, ± 3% (7 watts), and a PTC power rating of 208 watts. The PTC/STC ratio is 88.5%, which is average as compared with other leading solar panels that we carry. As of this review, the average of other solar modules that we carry is 89.7%.
Quality Standards – This is where SOLON stands out: they are UL and UL-C listed (Underwriters Laboratory & UL – Canada), CEC and FSEC registered. The CEC registration ensures these SOLON modules meet the E.U.’s consumer safety, health and environmental requirements. FSEC registration means these modules have met performance requirements defined at the Florida Solar Energy Center. SOLON manufacturing meets ISO 9001 quality management systems as well as ISO 14001, the requirements for environmental management systems. SOLON’s focus on quality separates this module from its competitors.
Warranty – These SOLON’s have a very granular product and power output warranty: - 10 years materials and workmanship on the module itself - Guaranteed 95% power output for 5 years - 90% for 10 years - 87% for 15 years - 83% for 20 years - 80% for 25 years The strength of this solar panel is reflected in the tiered warranty levels not seen on other panels. The most common warranty is 5 years materials and workmanship, 90% for 10 years, and 80% for 25 years. The fact that SOLON specifies expected output at specific values indicates the focus on quality for these modules – they know what they’re selling so you’ll know what you’re buying.
Glass – Transparent, tempered 4mm safety glass. This module series meets a 5400Pa wind load according to IEC61215. The modules are also tested for hail impact strength, up to 1.1”in (28mm) diameter at a speed of 53.4mph (86km/h). 2400Pa is a more common benchmark for wind loading, and stronger modules test to the 5400Pa level. If you are concerned about high winds in your area this module is a good choice.
Frame – These SOLON panels have twin-walled aluminum with pressed frames making for a stronger and more durable module. The frames are not screwed together, the most common method for frame construction. Frames are also robotically de-burred, reducing the likelihood of cuts and scrapes during installation. The frames also have drainage holes for good water runoff.
Weight & dimensions – The module is 64.57”x39.37”x1.65” (1640 X 1000 X 42 mm). It weighs 51.8 lbs (23.5kg) – a bit heavier than other popular panels that we are currently carrying at SolarTown. The added weight is likely a result of the twin-walled aluminum frame.
Junction Box/Connector Type – The 235/15 has a Tyco junction box with bypass diodes. The 1,000mm (39.37”) cables are size 12AWG (4mm) and use Tyco Solarlok connectors. 12AWG is a standard cable gauge and Tyco connectors compete with MC4 connectors for market share. Both provide reliable, secure module connections.
Cost & Value –These solar panels are slightly more expensive on a $/PTC basis than many other modules that we are carrying , but they have shown the best output of the panels we compared in our own onsight comparison of this solar module with other leading modules. You get what you pay for in this module.
Opinion/recommendation – SOLON has done a great job focusing on quality in their products. Their testing goes beyond the typical UL requirements. SOLON modules have a high power density, robotic frame construction and high quality cells to ensure long and productive results. If you take pride in your work and want a reliable, productive array, these SOLON modules are a great choice. Our own installation experience has shown SOLON modules to be worth the price!
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