Mike in Va Posted April 8, 2022 Share Posted April 8, 2022 My 2001 Holiday Rambler Ambassador came with 2 6 volt cabin batteries and now I'm adding 2 more 6 volt batteries for a total of 4. I'm adding a 1500 watt inverter also. Should I wire the new batteries together or mix a new one with a old one? The 2 old batteries aren't that old and are working great so not going to replace them. Thanks for the input. Link to comment Share on other sites More sharing options...
Chuck B 2004 Windsor Posted April 8, 2022 Share Posted April 8, 2022 You would do better to replace the 2 existing batteries with new ones because they will pull the new ones down to their level. Chuck B 2004 Windsor 1 Link to comment Share on other sites More sharing options...
Tom Wallis Posted April 8, 2022 Share Posted April 8, 2022 16 minutes ago, Chuck B 2004 Windsor said: You would do better to replace the 2 existing batteries with new ones because they will pull the new ones down to their level. Chuck B 2004 Windsor I would agree. Unless they are fairly new or at least in excellent condition it can be counterproductive to mix old and new batteries. Link to comment Share on other sites More sharing options...
Gary Cole Posted April 9, 2022 Share Posted April 9, 2022 Check the resting voltage of the old batteries after a full charge and same with new batteries. If the difference is less than .25 V then I would use them. When I have a battery failure due to a bad cell I don't automatically replace all. Link to comment Share on other sites More sharing options...
Tom Wallis Posted April 9, 2022 Share Posted April 9, 2022 19 minutes ago, Gary Cole said: Check the resting voltage of the old batteries after a full charge and same with new batteries. If the difference is less than .25 V then I would use them. When I have a battery failure due to a bad cell I don't automatically replace all. I agree with with Gary also. Resting voltage will be after fully charging then no charge or discharge for at least an hour. Link to comment Share on other sites More sharing options...
Mike in Va Posted April 9, 2022 Author Share Posted April 9, 2022 Thanks everyone for the input. Went ahead and replaced the 2 old batteries , starting with 4 new Trojan 6 volt 210ah batteries. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now