Are you going to be around 120VAC during the week at the work site. It is very easy to plug your shore power cable into a standard 120VAC 20AMP Service.
This will run just about everything in the camper. You may have to select what is on at the same time in order not to exceed 20AMPS draw... i.e. can't run the air conditioner at same time you fire up the microwave etc...
You also can use your OTA BATWING type antenna to pick up BROADCAST TV from the local town...
If you are not going to have a 120VAC Shore Power receptacle available then with just a couple of batteries and small 2KW Honda type generator you can run alot of items off the batteries during the evening like your home entertainment setup, lights, and alot of other low wattage items using a small sized INVERTER and direct connected to the batteries.
The idea here is plan what you want to do and not run down your batteries more than 12.0VDC by the next morning. Then using a 2KW portable Generator your can run your trailer and if you have a smart mode controller/charger on board can recharge your batteries back up to their 90% charge state in a quick three hours generator run time. This will let you do all of this all over again for the next day/night off the batteries.
We camp this way all the time back off the trails around here with a 255AH battery bank... Two low cost 6VDC golf cart deep cycle batteries in series will give you a good 220-225AHs of battery capacity.
Having a larger battery bank goes hand in hand with solar panels. If you don't have anywhere to store the solar power then it won't work well for after dark. A typical 120WATT SOLAR Panel will only produce around 5-6 AMPS of DC Current.
Keep in mind you have to put back all you take out of our batteries over night. It takes 14.4VDC at 20AMPS capacity to re-charge a single 12VDC deep cycle batteries from a 50% charge state to a 90% charge state in a three hour period. Your panels will probably not have enough DC AMPS to do this in a 6 hour or so high sun day to get your batteries backup to their 90% charge state. You can gain back almost all of your battery capacity if you get them charged back up to their 90% charge state - otherwise the batteries will start going dead real quick when you start using them again.
The battery bank won't last long if you are thinking I will just re-charge them a hour or so each day before using them again. This will do harm to the batteries. To be successful you need to start the day/night run off the batteries with at least a 90% charge state. Even doing this you must also go for a 100% re-charge state on the batteries after some 12-14 cycles of 50% to 90% charge states. Not doing this will also harm your batteries. This will take around 12 hours of smart mode charging to get the batteries to a 100% charge state.
You just can't just show up and think things will work well for you when it comes to living off the batteries. Takes good planning to be successful... I personally don't think your solar panels will keep a 225AH battery bank re-charged if you drop your batteries down to their 50% charge state each day/night run. You may have to use a generator to get past the initial high current part of the re-charge cycle first then switch the over to the solar panels for the rest of the high sun day period. Bottom line is you have to start each day/night run off the batteries at a 90% charge state otherwise the batteries won't last long for you...
No sense living like a hermit in your TC camper if you don't have to... Then on the weekends you can find a place to dump your tanks etc... I'm guessing you may need to clean-up a couple of times at your work site...
Not an expert here just know what to expect when living off the batteries here from experience... Its not as easy as one would think it might be...
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
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