mixing battery's and modified inverters

mike74820

i know mixing them is really bad  thing too do, but i want to go to 24 volts, how long will mixing 2 golf cart 235hr battery's and one deep 105ah marine  battery last? and also how well does led tv's and led lights  run off a modified sine wave inverter ? thanks in advance for your answers

vtmaps

mike74820 said:

i know mixing them is really a thing too do,

I disagree.  It is a really bad thing to do.  Do not mix the battery types.

mike74820 said:

 and also how well does led tv's and led lights  run off a modified inverter ?

I presume you mean a modified sine wave inverter.  Unfortunately, it is very difficult to predict.  There are many different degrees of modified sine wave quality... some inverters are better than others. 

--vtMaps

mike74820

i fixed the post i know they arent the best thing too. 

BB.

Usually, the Marine Battery is going to be the "weak link" in the system.

As long as you treat the string as a 24 volt @ 105 AH battery bank and don't deep cycle it very much--It could work OK.

Secondary issues could arrise... A possible problem would be the older(?) deep cycle batteries will have higher self discharge current--And when you try to bring the bank back to >90% state of charge, you may end up with the marine battery at >90% and the deep cycle at <80% SOC--And when you equalize, the Marine battery may use "lots" of extra water and possibly even overheat.

For experimentation--It should work. For a run and forget system--I would highly recommend avoid this type of operation.

The MSW vs PSW/TSW inverter issue should be pretty much unrelated to the battery bank question. Instead, it is the AC loads that will be affected by the MSW/PSW inverter question.

Induction motors do not like MSW (tend to run hot). Some electronics will run hot or even fail (minutes/hours/days--who knows). It is the old 80/20 rule. Probably 80% of the loads will run OK. Another 10% will fail, and the last 10% could have issues (run hot, noisy, or fail eventually).

-Bill

mike74820

sounds like it's better just to wait until next year to go 24 volts and do it right thanks for all your help

oil pan 4

modified sine is pretty well known for burning out advanced electronics.