Bests & Worsts Reviews from Amazon

Installed in class A RV (30 Amp Service). Used 100 amp shunt. Wired with 22/4 stranded alarm wire purchased at home depot for .30 cents per foot. Mounted flush adjacent to rv systems control panel. Unit works as advertised and I am very pleased. Another reviewer mentioned using a DPDT swith to use one meter to monitor both charge and discharge readings. Sounds like a good idea to me. I will update after I install the switch. For now, I have the meter measuring discharge. Wish I would have bought this years ago. Update 14 Feb 2017: I installed a double pole double throw (DPDT) on-off-on switch. This allows one meter to measure discharge or charge rates (or measure voltage only in the off position). Works perfectly. Just wire the switch to swap the two conductors hooked to the shunt. In my case this was the green and white wires. For info only....your situation may be different. Update 6 Apr 2017: For what it's worth, my generator draws a max of 79 amps (momentarily) when cranking the starter. So the 100 amp shunt is adequate for my rv. The generator starter is my highest 12 volt house battery draw. Using this monitor, I've learned having my rv plugged in to shore power, while the use/store switch is in the "store" position will cause about a 13 watt constant power drain. If I disconnect the shore power, the draw goes to zero. I dont know why this is. But, its nice to know and explains why I had low batteries a few times in the past. Update 29 Mar 2020: This meter has been powered up constantly for over three years. Never missed a beat. Still working fine. One of the few systems on my rv that didn’t fail yet. Update 24 Nov 2021: Still working fine….however it started acting a bit wonky…..it was corrosion on the battery connectors. My fault for not keeping an eye on it. Little bit of cleaning and all is well again. Update 14 Jan 2023: Still going strong!