Yes, some of the MSR-2000 power supplies also have battery type selection mode (switching).
> I understand from reading a MSR-2000 manual, the power supply > can be set for Nicad or Lead-acid batteries. > I was mostly interested in a battery cut-off circuit, so the > power supply doesn't over charge the battery. Which should be built-in to the function of the charger... at least with most commercial chargers. > Although, from reading the emails, a over discharge circuit > should also be used. A low voltage (discharge) disconnect "lvd" circuit should be (but is not always) in the must-have list. > Does Xantrex or http://www.newmarpower.com/ have a cut-off & > a over discharge circuit? The Xantrex Charge Controller has an over voltage/charge operation mode. The Newmar LVD is a low voltage disconnect, which is a different animal indeed. re: Adding a max voltage disconnect to Newmar LVD... it's normally not done/required but it wouldn't be a major deal to add one if you really needed the function in the same LVD box. Normally the max battery voltage is controlled and limited by the charge controller. The LVD function is used when the charger and/or power supply source fails. Having the equipment drain the supply voltage down toward zero volts will really kill off the battery bank. If you have a basic (not-smart) charger on the battery bank... an external voltage sense circuit can detect a max capacity event and start to load divert or shunt away the excess energy. Rare should be the case where you have so much rude excessive available energy that a load diversion or shunt device would be required. The few examples I can think of are my Propane/Gas Powered TEG (Thermal Electric Generator) units that must (should) run near 100% (full tilt) at X-value output, a few mini hydro units and some large wind systems. > My batteries are awaiting for the properly controlled charger, > with as much details. > Thanks & 73's, > Jim Kh6jkg. The proper charge controller and a system Low Voltage Disconnect... because few energy sources are 100% reliable. Another follow up post mentions the C-40 family of charge controllers, which are very nice devices but only limited to one of the available functions per device. The C35, C40 and C60 Controllers can be configured in standard charger, load diversion and other charging systems as one function (only)... but one unit will not provide the multiple charger/LVD/diversion functions used/required at some installations. In short you'd need two C40 units to provide a charge controller and load diversion function... but from memory I'm not sure if the Xantrex units also provide a LVD function when placed into a diversion configuration. The C-40 and C-60 solar charge controllers have a built-in battery voltage charge and equalization function, which also should include a max charge limit function. Used with the Newmar LVD and you've got a rock and roll ready to go system. I've even seen examples where people have both solar and electric battery chargers driving the Xantrex C-60 Controller and it seems to work pretty well. One local wifi site (not mine) has a small plain-jane un-regulated 13 volt auto battery charger supplying energy the controller. It works and of course it was cheap for the wifi owner to set up. cheers, s.
