Thursday 26 May 2016

Energy Storage Banks

1500W Output
Complete Residential, Boat, and
Light Commercial
With Solar Inverter and Charge Controller


 

Call for pricing above 5 each at (801) 566-5678

·        Input: Photo-Voltaic MPPT-1500W and AC 700W Input
·        AC Output: 1500W (Voltage is adjustable); Pure Sine Wave, High Frequency Inverter Output
·        Nominal Lithium Battery Pack Voltage: 48 Volts, 3,315Wh
·        Equal to Off-line UPS function
·        Factory Warranty: 5 years
·        Off-grid Operation
·        LCD Display

Tuesday 17 May 2016

J1772 Connectors

The main stimulus for the development of SAE J1772 came from the California Air Resources Board. Formerly electric vehicles like the General Motors EV1 had used inductive charger couplers. These were ruled out in favor of conductive coupling to supply electricity for recharging with the California Air Resources Board settling upon the SAE J1772-2001 standard as the charging interface for electric vehicles in California in June 2001. Avcon manufactured a rectangular connector compliant with that SAE J1772 REVNOV 2001 specification that was capable of delivering up to 6.6kW of electrical power. (Photos and description of this old-revision rectangular "AVCon connector" and "AVCon inlet".

 The CARB regulation of 2001 mandated the usage of SAE J1772-2001 beginning with the 2006 model year. Later requirements asked for higher currents to be used than the Avcon connector could provide. This process led to the proposal of a new round connector design by Yazaki which allows for an increased power delivery of up to 19.2kW delivered via single phase 120–240 V AC at up to 80 amperes. In 2008 the CARB published a draft amendment to section 1962.2 Title 13 that mandated the usage of the oncoming SAE J1772 standard beginning with the 2010 model year.

Type 1 "J1772" (Japan/US) slow AC connector
The Yazaki plug that was built to the new SAE J1772 plug standard successfully completed certification at UL. The standard specification was subsequently voted upon by the SAE committee in July 2009. On January 14, 2010 the SAE J1772 REV 2009 was adopted by the SAE Motor Vehicle Council. The companies participating in or supporting the revised -2009 standard include Smart, Chrysler, GM, Ford, Toyota, Honda, Nissan, and Tesla.

The SAE J1772-2009 connector specification has been added to the international IEC 62196-2 standard ("Part 2: Dimensional compatibility and interchangeability requirements for a.c. pin and contact-tube accessories") with voting on the final specification to close in May 2011. The SAE J1772 connector is considered a "Type 1" implementation providing a single phase coupler.

Sunday 8 May 2016

Solar Charge Controllers

Charge controllers are sold to consumers as separate devices, often in conjunction with solar or wind power generators, for uses such as RV, boat, and off-the-grid home battery storage systems. In solar applications, charge controllers may also be called solar regulators. Some charge controllers / solar regulators have additional features, such as a low voltage disconnect (LVD), a separate circuit which powers down the load when the batteries become overly discharged (some battery chemistries are such that over-discharge can ruin the battery).


A series charge controller or series regulator disables further current flow into batteries when they are full. A shunt charge controller or shunt regulator diverts excess electricity to an auxiliary or "shunt" load, such as an electric water heater, when batteries are full.

Simple charge controllers stop charging a battery when they exceed a set high voltage level, and re-enable charging when battery voltage drops back below that level. Pulse width modulation (PWM) and maximum power point tracker (MPPT) technologies are more electronically sophisticated, adjusting charging rates depending on the battery's level, to allow charging closer to its maximum capacity.

A charge controller with MPPT capability frees the system designer from closely matching available PV voltage to battery voltage. Considerable efficiency gains can be achieved, particularly when the PV array is located at some distance from the battery. By way of example, a 150 volt PV array connected to an MPPT charge controller can be used to charge a 24 or 48 volt battery. Higher array voltage means lower array current, so the savings in wiring costs can more than pay for the controller.

Charge controllers may also monitor battery temperature to prevent overheating. Some charge controller systems also display data, transmit data to remote displays, and data logging to track electric flow over time.

Circuitry that functions as a charge regulator controller may consist of several electrical components, or may be encapsulated in a single microchip, an integrated circuit (IC) usually called a charge controller IC or charge control IC.

Charge controller circuits are used for rechargeable electronic devices such as cell phones, laptop computers, portable audio players, and uninterruptible power supplies, as well as for larger battery systems found in electric vehicles and orbiting space satellites