dedmiston wrote:dapperdan wrote:
I had 300 watts on our previous trailer and now 660 watts of solar on our current trailer, haven’t taken the batteries out since the solar went in! I haven’t had a battery issue yet, the solar keeps the batteries “full”, no freezing. Here in WI it can get below zero, maybe not as cold as Minnesota but cold none the less. :B
Hey Dan - Question about your solar. We store our rig in the southwest where I worry about dust and crud covering up our panels (700W), but we get enough rain in the cooler months to hose them off.
What do you do in Wisconsin with the snow? Does the snow accumulate and cover your panels?
We sure love having the batteries charged and ready to go 24/7/365.
bikendan wrote:rfloyd99 wrote:
I read somewhere that batteries should not be allowed to freeze.
You need to find better resources to read. As was said, fully charged batteries are fine to at least 0°F.
Flapper wrote:Gdetrailer wrote:nickthehunter wrote:
If they are fully charged they won’t freeze at zero. As they self discharge over time while sitting there they could. A discharged battery will freeze at 20* F. A trickle charger or something similar (solar?j will help to keep the batteries fully charged.
Folks don't take batteries out of their cars for winter when not using that car for several months in the winter, why should one drag the batteries out of their RV for winter?
Fully charged batteries will not freeze even in sub freezing temps for weeks at a time.
Simply put, no need to go to the work and hassle of removing and storing the batteries inside your home, garage or basement as long as you have fully charged the battery and have disconnected the battery from the RV electrical system for the winter provided you do not have access to power while in storage.
If you have a RV with a modern multistage converter and you have power available, you can even just plug the RV in and let the converter take care of the batteries.
What you don't want to do is leave the batteries connected to your RVs electrical system without having some means of charging. The RV electrical system has 12V devices like the stereo, water heater, fridge, furnace which all draw a small amount of power even when they are turned off.. Those small draws will flatten your battery in a matter of a week or two.. Hence the need to plug RV into power or disconnect the batteries for storage.
x2 on this! If batteries routinely froze at 0, none of us in Minnesota would ever be able to drive our cars!
Fully charged batteries won't freeze until -73F. For 20 yrs, I have just fully charged the 6 various RV and boat batteries I own, completely disconnected, and left outside in their respective boats/RV's. Ditto on the vast majority of boat owners in our region. Nov-April, and in the spring mine have never been at less than 85% of charge, and usually above 90%. Batteries do self discharge over time, but cold slows them way, way down. In Minn, even with the summer, the average temps mean over a year before they get to 50% self discharge. MUCH faster in Texas or Arizona in the summer - then it may be 3 months. For places that get snow, just fully charge, disconnect and forget until spring.
My 2¢ !
I do NOT believe in leaving a battery on a tender for days on end. If you are using a tender, connect it to an old fashioned lamp timer. Only charge for about 4 hours a day.