How To Connect Solar Panel to 12 Volt Battery
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Review: Solar Charging Kit Showdown, Himalayas Edition10/27/16 ,via IEEE Spectrum
and its US $550 Sherpa 100 kit comes with an 8,800-milliampere-hour lithium-ion battery, a detachable 110-volt AC inverter, and a 20-watt solar panel that folds down to 33 by 21 by 2.5 centimeters. The battery has two USB ports, a laptop port, and
Goal Zero Solar Battery Charging With the Sun04/26/16 ,via Four Wheeler Network
Along with the Nomad 20 we used the Guardian 12-volt charge controller, which allows connection of a solar panel to a 12-volt lead-acid battery to monitor the charging of the battery. It provides a three-stage lead-acid charger that is also compatible
This portable solar charger is big enough to be your emergency home power source12/16/15 ,via Treehugger
These larger solar systems can serve as a microgrid by supplying both AC (house current) with an onboard inverter, and DC (portable gizmos, charging batteries), and by offering a number of different output ports (USB, 12V auto, RV plugs, standard 110V
Semiconductor Engineering .:. GaN Power Semi Biz Heats Up - SemiEngineering
The sell for devices based on gallium nitride (GaN) technology is heating up amid the push for faster and more power efficient systems. Today, GaN is by many used in the production of LEDs. And the GaN-based power semiconductor market finally appears ready to take off, after several false starts and sad results in the arena. In 2010, vendors announced the first wave of GaN-based power semiconductors. But until recently, upshot availability was scarce, prices were high, and the technology was in search of an application. Now, though, GaN-based power semis are making inroads in the power outfit market. And over time, the devices are expected to move into electric vehicles, fast-charging adapters for mobile devices, wireless charging and other systems. “Desired for GaN is sprouting up everywhere,” said Alex Lidow, chief executive of Efficient Power Conversion (EPC), one of the pioneers in the GaN-based power semi peddle. “The biggest apps are LiDAR (light distancing and ranging), envelope tracking for 4G/5G LTE base stations, and DC-DC converters for servers and telecom gear. Wireless charging is still small, but I anticipate it will be one of our top three applications by 2020. ”. GaN-based power devices and other types of power semiconductors are acquainted with in the field of power electronics. Basically, power electronics utilize various solid-state electronic components, which check and convert electric power more efficiently in everything from chargers for smartphones to large power plants. In these solid-state components, the chips pat the switching and power conversion functions. For these applications, GaN is ideal. Based on gallium and nitride, GaN is a III-V, wide-bandgap technology, implication that it is faster and provides higher breakdown voltages than traditional silicon-based devices. The problem is that, in general, silicon-based power semis lay down enough performance for many applications and are still cheaper than GaN. In addition, GaN-based power semis are produced using a GaN-on-silicon process, which is a relativity extravagant and complex technology. “GaN semiconductors have started to make a dent in the overall power semiconductor market, but it is still very small so far,” said Richard Eden, a older analyst at IHS Markit Technology, a market research firm. In total, the market for power modules and power discrete devices is expected to get get from $11. 9 billion in 2015 to $12. 7 billion in 2016, according to Yole Developpement. Of that figure, the GaN-based power semi call is projected to be a mere $10 million business in 2016, according to Yole, but that business is projected to grow at an annual rate of 86% from 2016 to 2021. The projected success for GaN-based power... EPC, GaN Systems, Infineon, Panasonic and Transphorm have shipped these devices, according to Yole. In addition, two foundries, TSMC and Win Semiconductors, fix up with provision GaN processes. And now, Wavetek, a business unit of Taiwan’s UMC, plans to enter the GaN foundry business. What are power semis. Meanwhile, power semis are designed to raise the efficiency and minimize the energy loss in systems. But in reality, a device may experience energy losses for two reasons—conduction and switching. Conduction detriment is due to the resistance in the device, while switching losses occur during the on and off states, according to Panasonic. Source: semiengineering.com
Do exciting cars generate as much particulate pollution as gas and diesel powered cars? - Treehugger
UPDATE: We esteemed some skepticism about this post when we originally posted it, but now it has been pretty much debunked. I am not taking it off the site because a) there is good discussion in comments and b) I stand by the belief that "cars are cars" and heavier cars are worse than light cars, whether gas or electric. George Monbiot tweets about an attractive and controversial study that came out a few months ago that concluded that electric cars put out particulate emissions that are as high as those from diesel and internal combustion apparatus powered cars(ICEV). The authors of the study claim that much of the particulate pollution is caused by brakes, tire wear and resuspension, or moving up debris that is on the ground already. The main problem is that batteries make electric cars heavier and therefore create more wear of tires and roads. Country-like Car Congress reprints part of the paywalled study:. … It can be hypothesized that each of the sources of non-exhaust PM emissions should be influenced by vehicle arrange. We know that road abrasion and tire wear are caused by the friction between the tire thread and road surface. Friction is a use of the friction coefficient between the tyres and the road, as well as a function of the normal force of the road. This force is directly proportional to the slant of the car. This means that increasing vehicle weight would increase the frictional force and therefore the rate of wear on both the tire and road surface. Brake pass slowly is caused by the friction between the brake pads and the wheels. The energy needed to reduce the momentum of a vehicle is proportional to the vehicle’s make haste and mass. Therefore, as the mass of the vehicle increases, more frictional energy is needed to slow it down, leading to greater brake dress in. © Timmers, Ashten/ click here for larger version Many of the complainers note that there is not going to be any pollution from brake bear up because most electric cars have regenerative braking. In fact, when you look at the data in the study, they assume that. they list the contribution from restraint wear as zero. It is almost entirely from road wear, tire wear and the controversial resuspension, (which commenters question as being off-the-wall) and all increase in proportion to weight. Then the complainers say that electric cars are not that heavy, but look at the Tesla Model X SUV. Most electric cars are heavier than their non-energized comparables. In the end, I believe that this study provides a valuable service. It reminds us once again that electric cars are still cars, and they still pollute, more or less depending on what their power sources are. I wrote earlier in an article where I accepted that the air would be so much cleaner in an electrified midwife precisely (and was strongly criticized for ignoring the pollution that comes from generating the power that charges electric cars):. And as for electric SUVs, they do not possession of in cities anymore than regular SUVs do , especially if it is true at all that pollution is proportional to weight. Electric car fans are passionate, but instead of complaining so much about this swotting, they should admit that weight is an issue for all cars, electric and gas, and as the abstract concludes , “Future policy should consequently focus on placement... Perhaps future policy should also focus on reducing the need for cars altogether, since. Source: www.treehugger.com
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Review: Solar Charging Kit Showdown, Himalayas Edition10/27/16 ,via IEEE Spectrum
The battery has two USB ports, a laptop port, and a 12-volt port ... I got USB battery chargers for our Sony and Canon cameras ($7.50 to $10 each) and a Magsafe 2 adapter ($20) for our Apple MacBook Pros. The solar panels are light and flexible enough ...
Solar 12 Volt Battery Charger Kit10/14/16 ,via ebay.com
Upgrade-400W COMPLETE KIT 400W Complete Kit 4 pcs 100W 1 pair 5m 2 pairs 45A 4 sets 1KW 110V off grid. Upgrade-300W COMPLETE KIT 300W Complete Kit 3 pcs 100W 1 pair 5m 2 pairs 45A 3 sets 1KW 110V off ... Renogy 100 Watts 12 Volts Monocrystalline Solar RV Kit.
Can a 12-volt solar battery charger charge a 36-volt battery?10/21/16 ,via answers.com
No, a 12-volt charger cannot charge a 36-volt battery. The electrical potential difference across the leads of a charger must exceed the electrical potential difference across the terminals of any battery it is expected to charge. And 12 volts is much less ...