battery/inverter recommendations

jluke wrote:
This is a topic that has been worked over pretty good, but I have a couple of questions. I have a 2000 Holiday Rambler with 2 6 volt batteries as house batts. We have a household refrigerator, not a large one, that, while on the road, I crank up the generator every couple of hours to keep cool. most of our trips are short ones, we do not boondock. End of this year, we are taking a long trip. I would like to install an inverter just for the fridge while driving, we will hook up to shore power every night. Can I add a 12v deep cycle for the additional juice needed or are 2 more 6v batts recommended. I am planning on a 2000 inverter, modified sine wave, do I need a pure sine wave for the fridge? Ideally, this would be a hookup where i don't have to unplug/plug, each night and morning. Does anyone have a schematic for this and or recommendations? Thanks to all

The tow vehicle should be able to provide enough 12 volt to the inverter while traveling down the road, so if you are 'always plugged in' at night there is no need for more battery. Even if you pull over for an hour or two while on the road your existing battery will not be drained enough to care.
Pure sine wave will work better. Some fridges will not start with MSW and all will work more efficiently with pure sine wave. This is both the motor will run hotter, and more power is required for a given fridge than with PSW.
2kw of pure sine wave is expensive, you may want to consider something smaller if the fridge is the only use; but how much smaller is dependent on your fridge, but more like half that should do. That said once you have an inverter you may well find other uses .....