Looking for advice

[Bartman]

Need some advice on an upgrade. I have a 10 year old 24 volt off-grid system that I'd like to upgrade. I'm debating on replacing the 450 AH FLA battery bank with 2 24 volt 280 AH Lifepo4 batteries. I have a 1500 watt array of 6 panels, a Magnum 4000 watt inverter and a Midnite Solar Classic 150 charge controller.
OR
Do I replace everything? looking at an EG4 XP6000 and the EG4 48volt 280AH wall battery. So many questions, I live in a cold climate so I'd need to build something insulated for the Lifepo4 battery. The start up voltage of the EG4 would require all 6 of my current panels to be wired in series, currently 3 strings into a combiner. The idle current of the Magnum inverter is 25 watts, half of the EG4.
So is it worth replacing the 10 year old 24 volt equipment and going to 48 volts with my not so big off-grid system? Or just upgrade the batteries on the 24 volt system to Lifepo4? And option 3, just put in new FLA batteries and not have to worry about the cold?
This is a cabin that's used 3 seasons and fulltime during the summer months. I do make weekend visits during the winter, so low power usage during the coldest time of year.
Thanks in advance

 

[glandpuck]

I will comment on going from FLA to lithium. You will be absolutely amazed at how much better your system performs. The resistance to charging of FLA vs lithium is lights out lower with lithium, and the discharge rates much faster also with less resistance. I would say if your FLA are 10 years old, just installing lithium even at 24 volt will show a very large improvement in system performance. Then, if you upgrade panels to an N type cell panel with a rated efficiency of 22-23%, you will also see a large increase in power output. You might be able to live with current inverter/chargers this way. There are many lithium batteries now on the market with built in heaters and fire extinguishers, although I am not sure about 12 or 24 volts for those.

 

[dopeassjackson]

Weekend visits during low sun times of year means you dont need a huge battery bank. I would also just change out the FLA batteries to lithium. Lithium has got so richer cheaper than FLA batteries from even 5yrs ago when I built my system with FLA batteries.