48V Battery bank charging

Mods - If you think this is the wrong place please move
I have just come into a good deal on a 48v inverter and [email protected] 48v of lithium battery bank and would like to install this in my RV. I would be removing my 12V inverter charger and my 12V battery bank 600Ah of AGM battery ( 3 200Ah 12V ).
I have just come into a good deal on a 48v inverter and [email protected] 48v of lithium battery bank and would like to install this in my RV. I would be removing my 12V inverter charger and my 12V battery bank 600Ah of AGM battery ( 3 200Ah 12V ).
To service my existing 12V needs I would install a DC to DC converter and leave one small 12V starting battery connected for my generator start.
Now with the back story in place, I have approximately 1800 watts of PV flat mounted on the roof (best I have seen is 1400w), in series / parallel ( 3 sets of 2 ) running open circuit is about 63v, into a Midnight Classic 150 and that to the battery bank.
I am wondering what the hive mind here would be on charging ? Do I have enough PV ? I am confident on the Charge Controller. What am I missing ? What have I not thought of ?
Thanks
Thanks
Comments
I moved your post to the RV section...
Will there be an issue with battery bank temperature (falling below freezing) in the RV (heated/insulated)?
Regarding how large of solar array--In general, 10%-13% rate of charge is usually a goodly amount of charging for the battery bank:
- 200 AH * 58 volts (actual LiIon charging voltage) * 1/0.77 panel+controller derating * 0.10 rate of charge = 1,506 Watt array
Seems reasonable for your RV... Flat roof (no tilt)--Suggests summer and/or southern US for dry camping. If you go "north" in winter, more genset usage...-Bill
Ideally, yes, need to know what the loads are (AH @ volts , WH, etc.) and location+seasons of usage (hours of sun). Harvest needs to match (somewhat exceed) daily loads.
Li Ion batteries are a much nicer cell that take/supply current in a much more "sane" manner vs Lead Acid (bulk/absorb/float).
-Bill
This being an RV the use and requirements vary as I live in it full time for a couple of weeks then it sits.
48 VDC inverters tend to be higher wattage rating vs 12 or 24 volt systems.
Do the entire "paper design" first before you purchase your hardware... Paper is cheap if you need to "fix" something.
-Bill