hot water tanks are aprimary place for leakstooccur. Presureize the slystem and use a flashlight to look at the bottom of the tank. You will probable see drips. You can buy just the tank if you are cabable of removing the unit and disassembling it. It is easier to buy a complete unit. Make sure that the new one has the connections that match the one you have.
Filters are available for all kinds of pproblems. Get the one that takes care of the problem you have. We use the type with two canisters and filters for particals and taste.. Check with a good RV supply for what you need.
Most converters only sypply a small amount of current to charge the battery. That is usually about 3 amphers. That is fone of the battery is fully charged. If it is discharged more than 10 per cent use an external charger to top- it off, then the converter should keep it up.