aangel
New Member
- Joined
- Aug 12, 2020
- Messages
- 97
I've already got a 200 a•hr (12V) battery that is running my RV. It's hooked up to a 2KW Giandel inverter. Works great. But it can't provide 240V the new a/c unit requires.
I've got a 48V EG4 that should be coming in next week (fingers crossed it's left the port of LA) and my Sigineer 6kW 48V inverter/MPPT charge controller just arrived.
I was going to replace the existing battery and inverter with the new system but a friend suggested, "Why not keep the 12V to run your lights, fans, Webasto heater, etc.?"
Why not indeed.
So let's say I remove the Giandel inverter and keep the 12V battery connected to the 12V lines around the RV. The equipment I have remaining is:
• Progressive Dynamics Converter/Charger already connected to the 12V battery
• GoPower! 30A transfer switch
• various switches and fuses
Now I add:
• a 120V to 48V charger
• The Sigineer 48V 240VAC Inverter
I no longer need the 48V to 12V step-down transformer I've bought; the 12V system is still in place.
The two questions I have are:
1. How do I charge these two systems from shore power? Do I have to have a switch that charges one system then the other—and I have to manually perform the switch? I likely can't charge both batteries without going over the 30A circuit at a typical RV park and I don't want to depend on 50A circuits going forward.
2. How do I charge these two systems from solar?
Of course a possible answer might be, "Save yourself some complication and switch over entirely to the new 48V battery." But then I lose my relatively new 200a•hr battery that a) cost me a load of cash a year ago and b) could keep a bunch of loads off the 48V system that is designed primarily to run the new mini-split a/c I just installed and the microwave.
I've got a 48V EG4 that should be coming in next week (fingers crossed it's left the port of LA) and my Sigineer 6kW 48V inverter/MPPT charge controller just arrived.
I was going to replace the existing battery and inverter with the new system but a friend suggested, "Why not keep the 12V to run your lights, fans, Webasto heater, etc.?"
Why not indeed.
So let's say I remove the Giandel inverter and keep the 12V battery connected to the 12V lines around the RV. The equipment I have remaining is:
• Progressive Dynamics Converter/Charger already connected to the 12V battery
• GoPower! 30A transfer switch
• various switches and fuses
Now I add:
• a 120V to 48V charger
• The Sigineer 48V 240VAC Inverter
I no longer need the 48V to 12V step-down transformer I've bought; the 12V system is still in place.
The two questions I have are:
1. How do I charge these two systems from shore power? Do I have to have a switch that charges one system then the other—and I have to manually perform the switch? I likely can't charge both batteries without going over the 30A circuit at a typical RV park and I don't want to depend on 50A circuits going forward.
2. How do I charge these two systems from solar?
Of course a possible answer might be, "Save yourself some complication and switch over entirely to the new 48V battery." But then I lose my relatively new 200a•hr battery that a) cost me a load of cash a year ago and b) could keep a bunch of loads off the 48V system that is designed primarily to run the new mini-split a/c I just installed and the microwave.