I have a large Fleetwood Diesel pusher with an Onan 6Kw diesel generator, a Magnum MS-2000 Inverter, and four 6V 208Ah lead acid batteries. I don't want to deal with battery maintenance and want to ensure my batteries always have good charge on them.
My plan is to replace the four 6v batteries with two 12v 150Ah / 1920Wh batteries (ohmmu.com) and four 100w solar panels (Amazon glass). (Coach is pre-wired for solar, but yes, I still need a solar controller/charger, yet to be decided on)
Now, all of this seems fairly straight forward to install and wire, but what I'm not finding on this site and I'm unsure of is, when I'm plugged into shore power or running the generator, how do I ensure my very expensive Lithium batteries are being charged correctly? Is it best to set maximum charge to 90% or another setting, or is charging to 100% okay to do? Also, I understand charging them when they are below 0F can also harm them, so how do I ensure this doesn't happen? The posts I see on charging at low temps suggest a heater pad, etc... But if my coach is in outdoor storage for a month and I go to pick it up, those batteries could be below 0F, unless people are leaving the heating pad on, running from the batteries themselves, using the solar to keep them charged in the off season?????
note: in reviewing the manual for the Inverter, Equalization is always manual, so I don't have to worry about automatic equalization ruining the batteries. The inverter can also be set to turn off at anywhere between 9 and 12.2 volts and I've heard with Lithium, the lower voltage is a better turn off point.
On top of all of this, my coach has an automated generator start up to start up the generator when the batteries get to a low voltage. (I need to do more research on this) Generator uses the house batteries to start, so they need enough of a charge to turn over the generator if in this automatic mode.
Someone else has to have done what I'm planning, so a little guidance would be appreciated.
My plan is to replace the four 6v batteries with two 12v 150Ah / 1920Wh batteries (ohmmu.com) and four 100w solar panels (Amazon glass). (Coach is pre-wired for solar, but yes, I still need a solar controller/charger, yet to be decided on)
Now, all of this seems fairly straight forward to install and wire, but what I'm not finding on this site and I'm unsure of is, when I'm plugged into shore power or running the generator, how do I ensure my very expensive Lithium batteries are being charged correctly? Is it best to set maximum charge to 90% or another setting, or is charging to 100% okay to do? Also, I understand charging them when they are below 0F can also harm them, so how do I ensure this doesn't happen? The posts I see on charging at low temps suggest a heater pad, etc... But if my coach is in outdoor storage for a month and I go to pick it up, those batteries could be below 0F, unless people are leaving the heating pad on, running from the batteries themselves, using the solar to keep them charged in the off season?????
note: in reviewing the manual for the Inverter, Equalization is always manual, so I don't have to worry about automatic equalization ruining the batteries. The inverter can also be set to turn off at anywhere between 9 and 12.2 volts and I've heard with Lithium, the lower voltage is a better turn off point.
On top of all of this, my coach has an automated generator start up to start up the generator when the batteries get to a low voltage. (I need to do more research on this) Generator uses the house batteries to start, so they need enough of a charge to turn over the generator if in this automatic mode.
Someone else has to have done what I'm planning, so a little guidance would be appreciated.
