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Posted By: GBP-Keithexpected endurance of 100 000 switching cycles.
Posted By: SteamyTeaRelays and Contactors have an uncanny knack of wielding themselves in the closed position, so assume they will not fail safe. One advantage of solid state ones, they are inherently safe.
Posted By: jamesingramI think the inverter relay is 1AI'd have thought any 20A contactor would do , such ashttp://www.hagergroup.ae/energy-distribution/automation-control/modular-contactors/1503.htm" rel="nofollow" >http://www.hagergroup.ae/energy-distribution/automation-control/modular-contactors/1503.htmhow many switching cycles do you estimate a day?
Posted By: Gavin_Arealistically, how many times are you expecting the contactor to be switching in it's lifetime?100,000 should be plenty
Posted By: SeretPosted By: Gavin_Arealistically, how many times are you expecting the contactor to be switching in it's lifetime?100,000 should be plentyYou've got to be a bit wary with boilerplate reliability figures like this. Often figures like MTBF will just be the average reliability, and averages hide a lot of data. On cloudy days your relay could be switching a lot. It would really depend how your system was set up, and what the implication of it failing either open or closed.Damon: I can see where you're coming from, but I'd say people install PV for different reasons. For some ethics would never come into it, as they're purely a money making machine. For some it's all about getting carbon out of the grid. And the whole spectrum of opinion in between; that's an effect of the generosity of the FITs. Who are we to judge?
obviously don't set it up to be switching on and off every few seconds.
Posted By: DamonHDI think intent is important in all sorts of circumstances, and the intent of the FiT is fairly clear, to displace ff generation on the grid
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