{"product_id":"progressive-industries-50-amp-permanent-electrical-management-system","title":"Progressive Industries 50 Amp Permanent Electrical Management System EMS-LCHW50","description":"\u003cp\u003eGet the most complete electrical protection available for your RV with the \u003cstrong\u003eProgressive Industries EMS-LCHW50 50 Amp Hardwired Electrical Management System\u003c\/strong\u003e. This permanently installed EMS is far more than a surge protector — it's a microprocessor-controlled guardian that continuously monitors your shore power and automatically shuts off power the instant it detects any dangerous condition, protecting the expensive electronics, appliances, and systems throughout your coach.\u003c\/p\u003e\n\n\u003ch3\u003eHigh\/Low Voltage Protection\u003c\/h3\u003e\n\u003cp\u003eWhenever AC power drops below 104 volts or rises above 132 volts, the EMS automatically shuts down power to the RV. It keeps monitoring, and once voltage returns to a safe range, the time delay counts down and power is automatically restored — protecting your gear from the brownouts and overvoltage conditions common at busy campgrounds.\u003c\/p\u003e\n\n\u003ch3\u003eAdjustable Time Delay for Your A\/C Compressor\u003c\/h3\u003e\n\u003cp\u003eAfter a power interruption or detected fault, a built-in time delay protects your A\/C compressor from damaging rapid cycling. The EMS offers two settings: \u003cstrong\u003e136 seconds (2:16)\u003c\/strong\u003e and \u003cstrong\u003e15 seconds\u003c\/strong\u003e. Check your air conditioner manual — if it has its own built-in delay, use the 15-second setting; if not, use the 136-second delay. (Factory setting is 15 seconds.)\u003c\/p\u003e\n\n\u003ch3\u003e5-Mode Surge Protection\u003c\/h3\u003e\n\u003cp\u003eThe EMS-LCHW50 provides full \u003cstrong\u003e5-mode surge protection\u003c\/strong\u003e (L-N, L-N, L-G, L-L, and N-G) with a \u003cstrong\u003e3,580-joule rating\u003c\/strong\u003e, an 88,000A surge current rating, and a response time under 1 nanosecond. If the surge circuit is ever damaged protecting your rig, the display shows error code E-10 to let you know the unit needs service.\u003c\/p\u003e\n\n\u003ch3\u003eComprehensive Fault Protection\u003c\/h3\u003e\n\u003cp\u003eThe EMS guards against the full spectrum of electrical faults, each with its own clear error code:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReverse polarity\u003c\/strong\u003e — blocks power, displays E-1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOpen neutral\u003c\/strong\u003e — display stays dark, power blocked\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOpen ground\u003c\/strong\u003e — blocks power, displays E-2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAC frequency deviation\u003c\/strong\u003e (±9 Hz from 60 Hz) — shuts down power, displays E-7 (high) or low-frequency code\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccidental 240V\u003c\/strong\u003e — instantly blocks\/cuts power, displays voltage and E-3 (never bypass the EMS when this occurs)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInformative Scrolling Display\u003c\/h3\u003e\n\u003cp\u003eThe digital display continuously scrolls all your AC power information — voltage, current, frequency, error codes, and previous errors — with each reading shown for two seconds. The \u003cstrong\u003eprevious error code feature\u003c\/strong\u003e tells you exactly what caused a power interruption (read by putting a \"P\" in front of the \"E\" code), so you can diagnose recurring pedestal problems.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt for Real-World Reliability\u003c\/h3\u003e\n\u003cp\u003eAn enclosed blue jumper wire lets you \u003cstrong\u003ebypass the computer circuit\u003c\/strong\u003e in the rare event of a computer failure, restoring AC power to the RV while still keeping surge protection active (other features are disabled in bypass mode). The \u003cstrong\u003emodular design\u003c\/strong\u003e means replacement parts are simple plug-and-play, making any future repairs genuinely user-friendly. Proudly made in the USA and backed by a \u003cstrong\u003elifetime warranty\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh\/low voltage protection\u003c\/strong\u003e — shuts down below 104V or above 132V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable A\/C compressor time delay\u003c\/strong\u003e — 136 or 15 seconds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5-mode surge protection\u003c\/strong\u003e — 3,580 joules, 88,000A, \u0026lt;1 ns response\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eReverse polarity, open neutral, open ground protection\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAC frequency protection\u003c\/strong\u003e (±9 Hz)\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eAccidental 240V protection\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eScrolling display\u003c\/strong\u003e with voltage, current, frequency, and error codes\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003ePrevious error code detection\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBypass switch\u003c\/strong\u003e for computer failure (keeps surge protection active)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMicroprocessor controlled\u003c\/strong\u003e with modular, easy-replace design\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePermanent hardwired installation\u003c\/strong\u003e — theft- and weather-protected\u003c\/li\u003e\n  \u003cli\u003eMade in the USA, backed by a lifetime warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBrand: Progressive Industries\u003c\/li\u003e\n  \u003cli\u003eModel: EMS-LCHW50\u003c\/li\u003e\n  \u003cli\u003eType: Hardwired Electrical Management System (EMS)\u003c\/li\u003e\n  \u003cli\u003eInstallation: Permanent\u003c\/li\u003e\n  \u003cli\u003eAmperage: 50 Amp\u003c\/li\u003e\n  \u003cli\u003eSurge Protection: 3,580 joules, 5-mode, 88,000A, \u0026lt;1 ns response\u003c\/li\u003e\n  \u003cli\u003eVoltage Cutoff: Below 104V \/ above 132V\u003c\/li\u003e\n  \u003cli\u003eA\/C Compressor Time Delay: 136 sec or 15 sec (selectable)\u003c\/li\u003e\n  \u003cli\u003eDimensions: 5\" W x 9-1\/2\" L x 4-1\/2\" H\u003c\/li\u003e\n  \u003cli\u003eCountry of Origin: USA\u003c\/li\u003e\n  \u003cli\u003eWarranty: Lifetime\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Progressive Industries","offers":[{"title":"Default Title","offer_id":57770050879791,"sku":null,"price":324.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/7663\/0063\/files\/POGEMS-LCHW50.jpg?v=1777997887","url":"https:\/\/thervsurplus.com\/products\/progressive-industries-50-amp-permanent-electrical-management-system","provider":"The RV Surplus","version":"1.0","type":"link"}