I am just starting to plan a solar/lithium battery system for my 5th wheel for both boon docking and camping at normal RV parks. The plan is to follow Will's 24 volt / 2000 watt design and components. The book is on order. I have not done a power budget yet, but when I boondocks with just a generator and lead acid batteries, I used 30-40 AH per 24 hr period.
I have not started buying parts yet as I have some questions:
1. I notice the plan does not include an isolation switch between the 24-12 volt converter and the 5th wheel 12V buss. That seems like a good idea to me. Any comments?
2. If don't have said isolation switch, what happens when I hook the 7-way connector from my truck to the 5th wheel? When it supplies 12V to the 5th wheel buss will that feed back into the 24V system?
3. What happens when I connect shore power to the 5th wheel? Then there will be two systems supplying power to the 120V AC system and the 12V DC buss.
4. If there are several cloudy days and the batteries run out, how do I recharge the 24V batteries with shore power or the generator?
Here is the proposed major component list from Will's suggested 24V:
1. 6 Renogy 100W solar panels, three sets of 2 panels hooked in series to provide ~36V for charging the 24V batteries, ~16 amps charging current.
2. EPEver MMPT MT50, 1200W, 24V designed for 150V and 40A.
3. 2 SOK 200AH, 12V LiFePO4 batteries hooked in series to produce 24V.
4. Giandel 3000W, 24V, pure sine inverter to run lights and the microwave.
5. UXCel 24-12V converter, 40A
Feedback?
Thanks, Tom
I have not started buying parts yet as I have some questions:
1. I notice the plan does not include an isolation switch between the 24-12 volt converter and the 5th wheel 12V buss. That seems like a good idea to me. Any comments?
2. If don't have said isolation switch, what happens when I hook the 7-way connector from my truck to the 5th wheel? When it supplies 12V to the 5th wheel buss will that feed back into the 24V system?
3. What happens when I connect shore power to the 5th wheel? Then there will be two systems supplying power to the 120V AC system and the 12V DC buss.
4. If there are several cloudy days and the batteries run out, how do I recharge the 24V batteries with shore power or the generator?
Here is the proposed major component list from Will's suggested 24V:
1. 6 Renogy 100W solar panels, three sets of 2 panels hooked in series to provide ~36V for charging the 24V batteries, ~16 amps charging current.
2. EPEver MMPT MT50, 1200W, 24V designed for 150V and 40A.
3. 2 SOK 200AH, 12V LiFePO4 batteries hooked in series to produce 24V.
4. Giandel 3000W, 24V, pure sine inverter to run lights and the microwave.
5. UXCel 24-12V converter, 40A
Feedback?
Thanks, Tom