Under the hood of a motorhome, focused on the gray alternator with a black belt.
Our motorhome has a high output alternator, but trying to pull too much power from it risks early failure.

Wind turbines are not known to create a lot of energy in residential applications. Users often state their wind generator can get a couple hundred watts even in windy weather. This is still a great way to capture otherwise wasted energy, but it's more of a trickle charge application to a large battery bank.

Solar might generate less than the stated watts on the panels

Solar power will be limited by the amount of solar panels you have, as well as the available sunlight. Even on a bright sunny day you can't expect more than the total sum of the panel wattage you have.

Those watts stated on your panel are for optimal conditions, in reality you should expect a lower output. A small system of four 100 watt panels might generate 300 watts on a fairly bright day. Considering system losses, you'll get less than 25 amps at 12 volts.

Solar energy is great but you might have limited RV roof space. Adding some portable solar panels that can be placed on the ground is a good way to increase capacity. For more information on sizing your solar array, check out our article How Much Solar Power Do I Need.

My seventh tip to the fastest way to charge RV batteries is to ensure you have enough incoming power

Combine charging for faster battery charging rates

A lot of people ask if it's okay to connect two power sources to a battery at the same time. Perhaps you have a small solar panel system and want to connect a battery charger for the fastest battery charging speed.

Yes, this is okay! It will not hurt the battery chargers or the RV's battery bank. You can combine as many battery chargers as you'd like.

There is one thing you should keep in mind though. A smart charger will monitor the battery voltage and change the rate of speed accordingly. It will bulk charge – high-current charging – when the voltage is low, and it will trickle charge when it's full. There may be three or even four different stages of charging.

If you have multiple battery chargers connected, it is possible it will trick the charger into thinking the battery is more full than it really is. This will cause the smart charger to slow down its charging rate.

Again, this won't hurt any of your chargers or batteries. Adding more chargers will almost certainly increase your overall battery charging rate.

My eighth tip to the fastest way to charge RV batteries is to combine charging methods

A top/side view of a deep cycle RV battery, seen under the kitchen seat.
The spot where I added the second battery in parallel has some more room. A future project is to add a solar charge controller in this area, which will allow for faster battery charging.

Now combine all of these tips for the fastest possible RV battery charging.

Any one of these tips can make a big different in the speed your battery charges. Combine them for the best way to keep your system speedy.

Here's a summary of the tips to the fastest way to charge RV batteries:

  1. Keep your batteries warm!
  2. Utilize fast charging battery technology – LiFePO4 lithium batteries
  3. Have a parallel battery system!
  4. Use thick wire
  5. Ensure all connections are robust
  6. Upgrade your battery chargers to high-current models
  7. Ensure you have enough incoming power
  8. Combine charging methods

One last note: Fast battery charging has obvious advantages. Charging at high speeds does wear on your system though. When you're not in a hurry, it's better to give a standard speed battery charge. Smart chargers do this automatically.

Share the Love!

If you’ve cooked one of our recipes or used one of our tutorials, be sure to take some pics of your handiwork! If you post it, be sure to tag us - @2NerdsInATruck on Instagram, and on TikTok, or post it our Facebook Page - so we can cheer you on!

Also, be sure to subscribe to our free email newsletter, so you never miss out on any of our nonsense. Well, the published nonsense, anyway!

Finally, if you love this post, please consider leaving a star rating and a comment, and/or sharing the link on social media!

More Maintenance

Reader Interactions

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.