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You definitely need a hardwired Surge Protection Unit. You have a good unit that should take care of your needs. The 40350-RVC has an Optional Remote Power Monitor LCD Display P/N 40299 that"s sold separately. If you done have it I would recommend adding it on and that should take care of your ATS & Pedestal Power Monitoring. If you needed to replace it, I would recommend the Progressive Industries EMS-LCHW50. It has 5-Modes of protection: Open Ground, Open Neutral & Reverse Polarity Detection, Over/Under voltage Protection, Accidental 240V Protection and A/C Frequency Protection. I have installed several of these over the years for myself, friends and family. The best protection comes from Miswired pedestals at the campgrounds and surge protection. It has Built-in Digital Display that scrolls continuously and show the Voltage(s), current, frequency, error code, and previous error code (if applicable). It also comes with a Lifetime Warranty. It will not energize your RV unless you have good power. I hope this helps out...

Still, an EMS will protect your RV. A surge protector- not so much. (More about this later) However, your power protection device might end up fried, causing you to need to purchase a new one.

This can cause the power supply to drop. (Especially in older parks where the wiring has not been updated since the "70s or "80s.) This is called a brownout.A huge power drop is called a brownout. It can be more damaging than a power surge.

Therefore, it"s vital to your rig"s health to get RV surge protection for RVs that shuts off power to your rig in such an event. Yes, you can check the voltage and the wiring before you plug-in.

Make sure the 30 or 50-amp circuit breaker is turned off at the power pedestal before plugging in your portable surge protection device or your camper power cord.

The best RV surge protector you can get is an EMS. An Electrical Management System is a different beast. Quite frankly, it"s what you should be using.

It would pretty much cover me for a surge, but no more than 2100 joules.Good thing I have been boondocking about 99.9% of the time during the last few years!

You will notice that the Southwire "surge protectors" have a higher joule rating than the Progressive Industries "surge protectors". But what does this mean and is it important?

So, let"s see if we can simplify what it is. A Joule in the context of RV "surge protector" for RVs is the maximum amount of energy that a "surge protector" can absorb and dissipate as heat.

In other words, how quickly the camper "surge protector" will respond, for example, to a sudden voltage spike. You want this to be an incredibly small number so that the power supply issue doesn"t have a chance to damage your RV.

The Progressive Industries "surge protectors" for RVs have a response time of less than 1 nanosecond (one billionth of a second). That"s a really small number, and thus a really fast response time.

Why? Because they both produce surge protection and electrical management system devices to protect your recreational vehicle from electrical issues when you are plugged into shore power.

Not a move in the right direction, in our opinion. Progressive Industries continues to be the only company that JUST produces RV "surge protector" products. Their parent company does manufacture other products.

While Progressive Industries" line of RV "surge protection" products are a bit more expensive than the competition (generally just a few dollars more), we think that the superior customer support and a few KEY better product features justify this increased cost.

While this doesn"t mean their RV "surge protection" products aren"t any good, it does mean that the company isn"t singularly focused, the way Progressive Industries is.

Recently they have been transitioning the RV surge protector line of products over to the Southwire name, moving away from the Technology Research brand.

What differs is that Southwire offers a "Connected Equipment Warranty" (Progressive does not) that covers damages to, well, equipment connected to their surge protectors.

Both companies manufacture surge suppression and Electrical Management System (EMS) devices to protect your recreational vehicle from shore power electrical issues.

Two electrical management systems (one that mounts permanently in your RV and one that is portable), and a Progressive portable RV surge protector that offers basic electrical protection.

The Progressive Industries EMS-HW30C (30 amp surge protector) and EMS-HW50C (50 amp surge protector) are Electrical Management Systems (EMS) that offers complete electrical protection for any RV that utilizes 30 or 50 amp electrical service. They offer the same great protection that the portable EMS-PT30X and EMS-PT50X do but in a hardwired version. In other words, the EMS-HW30C and EMS-HW50C are permanently mounted inside your RV.

They no longer offer 24/7 customer support (just Monday through Friday, normal business hours), but they do have a reputation of being the most customer-friendly company making "surge protectors" for RVs.

It offers instantaneous (in under 1 nanosecond) electrical surge protection, as well as continual monitoring of electricity quality coming into your RV.

These units will also prevent power from reaching your rig if they are plugged into a 240-volt power source. Both of these models come with a single remote LED display.

There is an option to add a second remote LED display that you can install inside the rig so you can monitor electrical conditions without having to go outside.

There is an automatic 136-second delay before shore power is allowed to go to your rig. During this time observe the LED display to make sure no fault has been found.

Able to bypass all Electrical Management System features (but maintain surge protection) in the event of circuit board failure. This allows you to continue to use the unit as a surge protector until you get a replacement part to restore EMS functionality.

In addition to providing great surge protection, these units will detect a wide variety of electrical issues and immediately shut off power to your RV.

We chose Progressive Industries electrical management systems as number one for their superior products and their backing of their surge protector for RVs.

Progressive has a very nice lifetime warranty on their surge protectors and EMS"s. Customers from Amazon (reviews) to bloggers are all very happy with the product.

By continually monitoring the shore power being supplied to your rig from the power pedestal, these units will react instantly (in under 1 nanosecond) when it detects a power surge condition.

Progressive RV surge protectors (Because they are not electrical management systems) will only provide active protection against voltage spikes such as those caused by lightning strikes.

To use this portable surge protector, first make sure the 30 and 50-amp breakers are off at the power pedestal. Then, plug the surge protector into the appropriate socket.

Southwire"s (formerly Technology Research) Surge Guard line of RV power protection is our runner-up company. They will provide your RV the protection you need.

The Southwire Surge Guard 35530 and 35550 does offer complete protection from electrical issues originating from the power pedestal. Still, we feel that the Progressive Industries EMS-HW30C and EMS-HW50C are a better choice.

The Surge Guard 35530/50 doesn"t include an LCD display so you can see what is happening with your power supply. It is an option costing around $100. When you include the purchase price of the display, the The Progressive Industries EMS-HW30C/50C is a much better deal (it includes a single remote display with the option to have a second one).

The Progressive Industries EMS-HW30C/50C has a bypass feature. It allows you to continue to use the unit in surge protection only mode should there be an issue with the Electrical Management Features. The Southwire 35530/50 does not have this ability. Why is this important? If there is a failure of the EMS unit, then the Southwire Surge Guard must be removed and replaced before you can power your coach via shore power. The Progressive Industries unit can bypass the fault and then be repaired in the field (the Southwires are not field repairable).

Once permanently installed in your rig, do the following to utilize your new Surge Guard EMS:Make sure the 30 and 50-amp circuit breakers are turned off at the power pedestal.

For any RV that uses 30 or 50-amp electrical service, the Southwire Surge Guard 34930 and 34950 portable electrical management systems offer complete electrical protection.

The Southwire Surge Guard 34950 portable EMS (50 amp version) can check the RVs wiring for an open ground condition. If there is an open ground in the RV wiring, the 34950 will not let power flow to the RV. The 30 amp version doesn"t offer this function.

Turn on the 30 or 50-amp circuit breaker and observe that the LED display is counting up to 10 seconds (built-in delay before connecting power to your RV).

Assuming no faults are detected, the Surge Guard 34930/50 will provide power to your RV after the 10-second delay. This will be indicated by the green "power on" LED being illuminated.

2-line LED display indicates incoming line voltage, amperage use and whether power is going to the RV. If a fault is present, the LED display will indicate the issue.

They only provide active protection against voltage spikes such as those caused by lightning strikes. These surge protectors will indicate a power supply issue. However, they will not stop power from reaching your RV under these conditions.

The Southwire Surge Guard 44280 and 44290 RV surge protectors will inform you, via LED lights, if there is an open ground or neutral, or a reverse polarity situation.

First, to use either of these surge protectors, make sure the 30 and 50-amp circuit breakers are shut off at the pedestal. Then plug the unit into the appropriate power supply.

If there is a fault indicator, refer to the front of the unit to see what the issue is. DO NOT plug your shore power cable into the surge protector until the issue has been resolved.

As to the old argument over what is better, the Surge Guard line from TRC Inc. or the products from Progressive, I"m not the expert here but I did spend 40 years in electrical field service and did install and repair a lot of equipment with various types of electric power protection and have also been an RV user for nearly that long. I never worried about such products in our early days but the RV of today has far more sensitive electronic equipment to worry about and so I have become an ardent user & supporter of such products. Based upon my limited knowledge and an extensive study of both products discussed in this thread, I have chosen to use the Surge Gurad 44260 and have been using their products now since 2003. It is difficult to prove what they may have prevented, but based upon what experience and knowledge that I do have, I consider the two major brands to be of pretty much equal quality and reliability, but that is only a personal opinion based upon my experience, background and electrical education.

To answer your question, it just depends upon how much protection you are looking for, versus the price that you are willing to pay. I use and recommend the higher level of protection, even at the higher cost and I choose the Surge Guard 44260 over the similar product from Progressive for a number of relatively minor design reasons and because I bought my Surge Guard from a prior user with only months of use and for about 1/2 of what it originally sold for. I would suspect that what you had previously was the 34730, which is what I have used for years but has now been discontinued. I suggest that you move to the new 44260 if want the same level of protection as your previous one provided. I will post a picture below, first of what I believe that you now have, next the 44260.

Displays immediate, detailed information on the UPS battery and power conditions, alerting users to potential problems before they can affect critical equipment and cause downtime. The rotatable panel is easily readable whether the UPS is rack mounted or standing as a tower.

Provides IT professionals with tools for monitoring and managing the UPS and backup power. This software offers remote management functionality. Free software download available. See the Resources tab.

I had the Surge Guard #40240 installed in my 5th wheel as soon as I bought it. It does everything that the Progressive units do and according to the guys teaching the RV Maint. Tech. training here in Texas is just as good a unit. The main thing is that you have the protection. One thing that they emphasized in the class is that all of these EMS (electrical management systems) are guaranteed for only one time protection and that like breakers, each time they"re tripped and reset, they get weaker and weaker. So that"s something to keep in mind. You can prevent some of those times by using a volt meter at the pedestal before you plug your rig in to it.