2018 Winnebago Micro Minnie 1808FBS - Battery Question

[sel09harley]

I purchased a 2018 Winnebago Micro Minnie 1808 FBS towable and I checked and there is one NAPA Premium Marine Deep Cycle Battery (Group 24, I think). I used a multimeter and there is 3.30 Volts and when plugged into shore power I am getting 3.72 Volts which indicates the power converter is charging the battery. The trailer has one slide with a dinette booth and a Lippert Power Tongue Jack. I plug into electricity 99% of the time when I use the jack and when I put the slide out or when I bring it in.

My question is to determine if this battery is big enough for this trailer. Any opinions?

Thank you and safe camping!!!

[creativepart]

A 12v deep cycle battery could not realistically test out at 3 volts. Is this a typo? Do you mean 12.30v and 12.72v?

[sel09harley]

You are right and I apologize. The numbers are 13.26 Volts and 13.76 when plugged into shore power.

Thank you

[creativepart]

Originally Posted by sel09harley

You are right and I apologize. The numbers are 13.26 Volts and 13.76 when plugged into shore power.

Those are not your battery's voltage, by the way. That is the charge being applied when plugged in and a surface charge resulting from the charging or perhaps the TT is still plugged into the tow vehicle.

A fully charged battery - after resting an hour without any charging or load being applied will be ~12.7v.

A single Group 24 battery will provide 70-80 amp hours of power. It's best to not draw more than 50% of the available amp hours to maintain long battery life. So, you have 35 to 40 amp hours of "usable" power available.

Is this enough? We'll yes most likely but no one can say how much power you'll be using from your battery. So, there is no one Yes or No answer to that question.

When I had travel trailers I always had 2-batteries installed on my A-frame. I felt more confident knowing I had extra power available if I needed it. Manufacturers leave the battery installation to the dealer and they normally install only one battery as a cost saving measure.

So, it's up to you. Keep in mind that you'll use that battery for not only the slide but for the propane heater fan and the tongue jack as well. You'd hate to run out of power.

Most TT owners find it super helpful to have an auxiliary generator as a back up for any dry camping as well. Be aware that a 2000w generator will probably not run your air conditioner.

Hope this helps.