Magnum MSH3012M 125A Pure Sine Wave Inverter Charger for RVs, Boats & Off-Grid Power - Reliable Backup Power Solution for Camping, Emergencies & Mobile Living

The same local utility that burned down our home also took out the inverter in our RV. I needed a replacement and looked for an upgrade. There were complaints about another manufacturer outsourcing their customer service and so I chose Magnum Energy. I had a question and called them and got a US-based technician to answer a question or two. I wanted an upgrade and so chose the MSH3012M.There were a number of reasons I chose this model. First, I wanted more power so went from the failed 15 year old 2000 watt Dimensions model to the 3000 watt. The original was a pseudo-sine wave; the MSH3012M is a true sine wave. Without going into the electronic differences, any appliance that can plug into a standard outlet will run with a true-sine wave inverter. This is particularly good for things like computers, microwaves, and other electronics.The greatest benefit of the MSH3012M is that it is a "Hybrid" inverter. In my case, my shore power is 15 amps (a standard household outlet). I am also on about 100 feet of extension cord. Before I had to turn off the fridge and other large loads to run the microwave. Not now! If the MSH3012M senses a draw greater than the programmed max, it uses the inverter circuit to "add" amperage from the batteries, invert them to AC and add that to the shore power. We can now forget about turning off the fridge or other AC loads and just use the microwave as we choose.We added the following units to add functionality to the MSH3012M: • Magnum Energy Advanced Remote Control with Digital LCD Display and 50' Cable (ME-ARC50). This displays a lot of information about the operation of the MSH3012M as well as adding a lot of control functions. • Magnum Energy ME & MS Series Battery Monitor Kit. This sends additional data to the MSH3012M to more accurately charge the batteries. • Magnum Energy ME-SBC Smart Battery Combiner. This allows the MSH3012M to charge the house batteries as well as the motor batteries.IMPORTANT NOTE: If upgrading to a larger capacity unit be aware that other changes may have to be made. In particular, I had to upgrade from 2/0 battery cables to 4/0 cables. I purchased cable cutters and lug crimpers and made all my own cables, but this is likely beyond the average RV owner's ability, so be sure to read all instructions and requirements for all modules before purchase. This upgrade would likely have cost me around $4000 if I had a shop do it... maybe more. The battery cable material alone was about $170. I was able to save about $1000 by doing all the work myself.