storage tips for keeping batteries in good shape ????

CA Traveller,

My solar controller is far more useful than the Magnum. For one reason. You don't have to plug it in.

My Magnum charger has 5 charging stages. Float, bulk, absorb and off are automatic. Off occurs when batteries are fully charged and house loads are minimum for a period of time, when the voltage drops a little it recharges as necessary. Equalization is manually started.

The Magnum charging is superior to solar in that solar usually charges each day then turns off after a period of time. The Magnum is much more aware of battery charge state. The Magnum also has a battery temperature probe as does my Morningstar MPPT 60 solar controller.

I'd want a charger with a temperature probe to adjust the charging voltages as specified by battery manufactures. A temperature compensated battery maintainer is a good choice.

1) Depends upon the charger, some charge correctly some don't.
2) A charger with maintenance mode or a maintenance only charger. Or fully charge then disconnect the batteries, I have a switch that completely disconnects the batteries, mfg switches usually leave some loads. Fully charge every month.
3) Google search for LNB's IF that is actually the problem. Do you have DTV or Dish?
4) Inverters convert DC to 120V AC, nothing to do with battery charging. If you mean charger/inverter combo then answered above.

Once the plates are exposed then that portion of the plates sulfates and you lose capacity which cannot be restored. Batteries could be weak or shot and voltage alone doesn't identify a weak battery. If weak but adequate for you then OK. BUT have them load tested so that you know. I'd go to a good battery shop and auto stores are not a good battery shop.

Adding acid changes the SP Specific Gravity and the battery will under preform. NEVER add acid.

I'll venture that there is a 99.9% change you need new batteries.

Your batteries are dry because your charger is overcharging. They have to be on a battery maintainer or a three stage charger that provides a float charge.
You should go ahead and replace the batteries you added acid to.

1 & 2 I do not keep the rv plugged in but I do have a solar system. Solar charge controllers are a lot more sophisticated than a converter. If you wish--get a timer and connect for only one hour per day. Battery life may be dramatically improved.

Never add acid to a battery. Only add distilled water.

There is no reason to leave the inverter on.