Product arrived on time and packaging was good. I needed this product for my RV, I have a class A gas coach. Installation was pretty easy. The instructions call for installation of this unit in a dry location close to both Coach and chassis batteries. Unfortunately both batteries for me are in open bays exposed to road moisture. I called Xantrex support and spoke with them about my delema. They recommended I mount the Echo on my floorboard next to my left leg and routed the wiring through the firewall to both batteries. The instructions say to use 12 gauge wire to extend the length of wire. For my application I needed a wire run of 8 feet from my coach batteries to the Echo and another 9-10 feet to my chassis battery from the Echo. Xantrex Tech support referenced a chart and recommended I use 8 gauge wire for the longer run, to reduce the voltage drop! So far the Echo is working as advertised, my chassis battery is remaining charged. We’ve been parked camping now for almost 3 weeks and my chassis battery is fully charged.I had to replace my chassis battery at the beginning of the season, when I had an oil change in June, the service center advised my battery was getting weak. My research led me to the Xantrex Echo to keep my chassis battery charged and its working as advertised. If you have any questions call Xantrex support, their number is in the instruction manual.We were having issues with our engine batteries constantly draining in our 2005 Itasca Horizon motorhome. Turns out the engine computer creates a parasitic draw on the engine batteries, so Itasca started installing a charger like this on 2006 models and later. Install was pretty simple. We did have buy extra wires, since the attached wires were really short. Also, the wire gauge they recommended was a lot larger compared to the existing wires, so there weren't any standard connectors we could find at Lowes or Home Depot. We bought the heat shrink connectors and that worked fine. After installing, our engine batteries stay fully charged!While this unit serves a purpose and is a nice electrical design there are several improvements that are needed. The fuses use the older style with the glass body and silver tipped ends. The contacts are made by spring tension, the holders are not the best sealed and the glass style fuses are fragile. They should use the newer plastic automotive fuse designs commonly available with a rubber capped sealed inline fuse holder. The other issue is by the length of the wiring harness these units get installed in RV battery compartments which is a hostile environment that needs to be rinsed out from time to time. The circuit boards of these units are not epoxy coated so the land patterns can corrode or be shorted by small amounts of splashed water. Be careful working with water around these units. These changes would make this a 5 star unit.this was simple to install and resolved my issue of chassis batteries not staying charged. integrates with the house charging system and verified only kicks in once those are charged, which is perfect when we're not on the road.ThanksUPDATE: 02/20/21 -- still have this unit charging my two RV starter batteries and still working as desired with no issues.I have a 2016 Winnebago View, its on a Mercedes 3500 sprinter platform. I installed this to keep the chassis battery charged when our RV goes into storage. When in storage its connected to shore power keeping the house and chassis batteries charged.Its a great little addition keeping everything fully charged ready for our next adventure.Well made and easy to use. The company said the unit cannot be repaired by the manufacturer or any authorized repair facility. Only option is to buy a new unit.I have a stand-alone deep cycle battery providing 12v power to my 120v refrigerator through a stand-alone inverter in my RV. I use it when I'm without shore power or generator power (as in driving down the highway). Prior to the Echo Charger the set-up worked well but was hard on the battery, as in life shortening. The Echo Charger, plus a dedicated 12v gauge, has taken the guess work out of my managing the battery.I had to extend the wires by about 18 inches. As is, they can barely reach the separate battery trays. But if your batteries are on roll-out trays, there is no slack to pull out the tray. Otherwise, it was an easy installation and seems to work fine.Installed it as part of project to isolate starter and house batteries with an ON/OFF/COMBINE switch, was easy to install and just works.It will take whatever charging source is applied to a battery bank (typically house) and redistribute some of it another bank (typically starter) while maintaining complete isolation of battery banks.If you have an RV, and your inverter/charger does not also charge your chassis battery; this is for you. Super easy to install, it just connects to both battery banks, and a ground. If your coach batteries are being charged, it will steal some power to keep the chassis batteries charged also.Installed it on my RV to keep the starter battery charged via solar/ AGM house battery. The RV is sometimes in outside storage with no 110AC available for a conventional trickle charger. The Echo Charge works beautifully. And a very easy install: connections to chassis battery, house battery, ground.Easy install, works as intended.Good product and well made that worked well for application