Progressive Industries 50 Amp Permanent Electrical Management System

The Elecrtical Management System provides total electrical protection of all your RV electronics and a complete digital display of the AC power source.
Item # 17112
Special Order Item No
Ships LTL Freight No
5+ In Stock

Description / Progressive Industries 50 Amp Permanent Electrical Management System

High/Low Voltage Protection:
Whenever AC power falls below 104 volts, or rises above 132 volts, the EMS automatically shuts down power to the RV. The EMS will monitor the power and once the AC power rises above 104 volts, or below the 132 volt level, the time delay indicator flashes for the preset time and then automatically restores power to the RV.

Time Delay for A/C Compressor:
If the AC power is interrupted, or the EMS detects a fault condition, the built-in time delay is activated. There are tow settings on the EMS: one is 136 seconds (02:16), and the other is 15 seconds. Consult your air conditioner manual to see if it has a time delay built in. If so, use the 15 second delay, if not; use the 136 second delay. The factory setting is 15 seconds.

5-Mode Surge Protection:
This feature provides full surge protection L-N, L-N, L-G, L-L and N-G. Total Joule rating is 3,580, 88,000A surge current. Response time of <1 nano second.

Surge Indicator:
In the event of a power surge, and the surge protector circuit is damaged within the EMS, L-N or L-G, the digital display error code will read E-10. This indicates the EMS needs to be serviced.

Reverse Polarity Protection:
If AC power is a reverse polarity condition, the EMS will not allow power to the RV and the error code will read E-1.

Open Neutral Protection:
If AC power has an open neutral condition, the display will not light, and the EMS will not allow power to the RV.

Open Ground Protection:
If AC power has an open ground condition, the EMS will read an error code of E-2 and power will not be allowed to the RV.

AC Frequency Protection:
If AC power frequency deviates +/- 9 hertz from 60 cycles per second, the EMS will shut down power. An error code of E-7 will be displayed when the frequency is high; and an error code will be displayed when frequency is low.

Accidental 240V Protection:
If 240 volts is detected when plugging into AC power, the EMS will NOT allow power to the RV. If this condition occurs while power is applied to the RV, the EMS shuts off power instantly. The display will read the voltage and E-3 for the error. (NEVER BYPASS THE EMS WHEN THIS OCCURS.)

Continuously scrolls all of the AC power information, including voltage, current, frequency, error codes and previous errors. Each reading is displayed for two (2) seconds.

Previous Error Code:
This feature tells the user what the previous error was and why power was interrupted to the RV. To read a previous error code, put a "P" in front of the "E" code. This is only displayed if an actual error occurs. The error is deleted when power is disconnected from the EMS.

Enclosed blue jumper wire allows the user to bypass the computer circuit in the EMS in the event of computer failure, thus allowing AC power into the RV. This does not disable the surge protection portion of the EMS; however, all other features are disabled.

Modular Design:
Replacement parts are designed for simple plug and play, making repairs extremely user friendly.

Microprocessor Controlled:
The computer is driven by a state-of-the-art microprocessor that is programmed with software to drive the entire EMS.

More Information

Item # 17112
Brand Progressive Industries
Model EMS-LCHW50
Installation Type Permanent
Amperage 50 Amp
Protection Rating 3580 Joules
Features Time Delay for A/C Compressor.
Five(5)-Mode Surge Protection
Surge Indicator.
Reverse Polarity Protection.
Open Neutral Protection.
Open Ground Protection.
AC Frequency Protection.
Accidental 220V Protection.
Previous Error Code Detection.
Bypass Switch.
Microprocessor Controlled.
Modular Design for easy to install replacement parts.
Dimensions 5"W x 9-1/2"L x 4-1/2"H
Warranty Lifetime
Made in USA
Special Order Item No
UPC 818811000108

Product Attachments

Users Manual (584.90 kB)

Customer Reviews

A must have for RV.
Review by
Easy to order. Arrived quickly and the best price. Good instructions. Unit was easy to install. Would recommend getting a good wire cutter/stripper tool as 6 gauge wire is thick.
Great works good
Review by
If you have any ability at all, the install is very easy (if not have an electrician install it. took me about 40 min. with reading the manual) great pice of mind that my rig is protected. good bang for the buck
Well made.
Review by
More difficult to install than expected. You need heavy duty wire cutters or hacksaw to cut #6 wire. Wire is very stiff and difficult to position into the limited space of the unit. Another inch or two where the wires tighten down would be helpful. Company is very helpful with questions.
Great Product, Lifetime Warranty
Review by
This is the hardwired unit, a great product. Easy install, the hardest part was me working inside the bin.
Dyers great pricing, free shipping (on this product when ordered), received product in less than 24 hours from order time with standard free shipping.
Works great.
Review by
This hardwired EMS was easy to install and took only about 30 minutes. Instructions were clear. There are pictures of the wiring on the company's web site that are not in the manual sent with the unit. This was helpful.
Unit works great.

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WARNING: This product can expose you to chemicals, which is known to the State of California to cause cancer and reproductive harm. For more information, go to

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