IEC 61427 PDF

This part of the IEC series gives general information relating to the requirements for the secondary batteries used in photovoltaic energy systems ( PVES). THE IMPORTANCE OF TESTING PV BATTERIES TO THE IEC STANDARD. BACKGROUND. Batteries in photovoltaic systems (PV) are unique in how. IEC recognizes that batteries in PV applications take on the characteristics of both float and cycling applications.

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The IEC standard provides that method. If not, the ic is considered to Phase B: A battery is said to be cycled when it is repetitively cycle life applies to a PV battery, how should one go about estimating charged and discharged in succession. If neither float life nor a float application.

It are charged and discharged cycled continuously in a laboratory under is worth examining in more detail what is meant by float life and cycle controlled conditions. Step Discharge time, hrs.

IEC | BatteryStandards

The content herein, unless otherwise known to be public domain, are Copyright – Space Media Network. Removing this harmful solvent from the production The test protocol is summarized in the two Step Discharge time, hrs. We offer outstanding technical support, provided by full-time application engineers.

Even though the Industrial line has surpassed the equivalent of a year cycle life test, Trojan’s engineering team reports that IEC testing of the Industrial line is still in progress after 2, cycles.

The test be correctly classified as either a float application or a true cycling subjects the battery to a series of shallow DOD cycles under low and application, an alternate method is required to specify battery life in a high SOC. We will define the service life of a PV as being either a float or cycling application. Enter the email address you signed up with and we’ll email you a reset link.

This seasonal aspect of the cycling test during the year, which is true for PV applications. However, the reality is that battery to be the number of cycles the battery delivers when tested renewable energy RE applications such as PV power systems are deep- to the IEC standard.

It offers a common, internationally-accepted platform to compare and contrast batteries from different manufacturers. The two Since neither float life nor cycle life adequately describes the expected equations below illustrate the simple relationship between the number life of a battery in a RE application, an alternate method is needed to of IEC cycles delivered by the battery and its service life in years.


The cycle endurance test is an accelerated simulation in extreme conditions of the battery’s operation in a photovoltaic energy system, and is conducted by submitting the single 2V cell to a period of cycles. These controlled charge and discharge conditions life of a battery. By stressing the batteries and operating them in this abusive testing environment, Trojan’s goal is to evaluate the overall effectiveness of the battery line’s ability to perform in renewable energy applications where operating at a partial states of charge is common.

Memory Foam Mattress Review. Additional copyrights may apply in whole or part to other bona fide parties. Researchers have made the production of batteries cheaper and safer Aalto, Finland SPX Nov 16, Researchers at Aalto University, Finland have developed a method for producing lithium batteries that is cheaper and more environmentally friendly than previously used methods. Log In Sign Up. Help Center Find new research papers in: This new process has succeeded in replacing the harmful methylpyrrolidone NMP solvent, which is traditionally used in the manufacturing of electrodes, with water.

Trojan Battery has announced that its Industrial line of batteries for renewable energy applications has achieved a major milestone in Trojan’s ongoing IEC testing by surpassing a year cycle life. Trojan has been conducting IEC testing on its deep-cycle, flooded Industrial batteries since Octoberand results to date show that the batteries are outperforming their rated year design life.

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Click here to sign up. Traditionally battery life has always been defined either as float life Deep-cycle battery manufacturers publish cycle life charts that show how many years it takes the battery to reach end of life at a specified the relationship between depth of discharge DOD and the number of reference temperature or as cycle life the number of times a battery can cycles delivered by the battery. In other words, a battery is not cycled in system.

Share this article via these popular social media networks del. In a UPS rarely occur in a PV system, estimating the life of a PV battery using a system, the traditional AC grid provides the power, but in the unlikely typical cycle life chart is discouraged as it will not be representative of a event of a grid failure the battery kicks in to power essential loads until field situation.


Current, A tables to the right. Trojan Battery Company reserves the right to make adjustments to this publication at any time, without notices or obligation. When a PV system designer is evaluating battery options for use In addition, the standard subjects the battery to PSOC cycles in which in PV installations, the IEC standard should be used as the the batteries are discharged before they are fully charged — a very benchmark to compare and contrast the batteries being considered common occurrence in RE systems.

Who’s Killing the Space Program? This ensures an apples-to-apples comparison which reinforces the applicability of the IEC standard to batteries for guarantees that each deep-cycle battery option is tested in exactly the PV systems.

While Trojan offers an eight-year warranty for its Industrial line, the batteries are actually testing to higher performance levels, demonstrating that actual battery life is much longer.

In addition, experience has shown that batteries in PV systems are routinely undersized either due to cost considerations or because the loads were underestimated for the system. As a result, life expectancy of PV batteries is difficult to quantify — until now. Since predictable charge or discharge such as in an uninterruptible power supply UPS system.

For a Trojan Master Distributor near you, call Because Trojan’s deep-cycle batteries are designed to operate at partial states of charge, the testing parameters being performed involve heavily discharging the batteries, which is a typical scenario in solar applications. Since one IEC cycle consists of 50 cycling applications, although there is an emerging trend for backup shallow cycles at low state of charge SOCand shallow cycles at power that requires the batteries to be in a hybrid mode.

Skip to main content. The batteries are engineered for high-energy requirements delivering 1, cycles at 80 percent depth-of-discharge, and features advanced battery technologies that provide optimum performance. To generate these charts the batteries be continuously charged and discharged before it reaches end of life.