48 volt 4 battery bank 100 ah each

Thanks, that was great information. I am still trying to understand whether to go to 48 volts or stay with 24 volts. I have 15 100 watt panels in series parallel. 3 banks of 5. I have a 60 amp epolar controller. I am going to purchase a 3000 watt inverter. I found one that will do either 24 or 48 volts. I have 2 100 ah batteries at 24 volts now. I want to go to 4 but I am not sure which is best 24 or 48 volts. Does 48 volt inverter use more idle energy than a 24volt? 48volts worries me a little.

I have no idea. I might look for one that auto shuts down. Not a fan of inverters for what that is worth!

The advantage is the inverter is likely more eff invertering from 48 vs 24, there may be info in the inverter manual, plus idle consumption.
another advantage is wire size/distance. 48v would be 1/2 the current of 24v and as we see in charts, voltage drop is based on current so the same size wire, same length would have less voltage drop, less wasted wire heating loss.

Mppt controller more eff also bucking from 90v to 48v is more eff than 90v to 24v.
The converter eff curves in the manual don't even show 90 to 24!

Nothing wrong with inverters (except poor eff), I just have always had a running engine to hook one to when needed so there was no need for batteries other than the start one cuz the alternator made enough power. Camping I just used 12v items so I did not need a big batt bank and could do without 120v.

You are using power as it is made and don't store it. interesting way to use solar, when the sun shines. If you can get the batteries FULLY charged on a regular basis that works, expensive lithium would be better since there is no requirement to FULLY charge.

I like the tech issues forum at rv.net www.rv.net/forum/index.cfm/fuseaction/listings/forum/39.cfm
couple of full timers have gone to 48v and a couple are using lithium.

nope, but I see no need having a batt bank big enough to operate a micro wave, coffee pot ect via inverter when the propane stove in the RV works fine, the furnace fan is 12v as are the LED lights. Solar as a maintainer in storage but it can make more than I use at times.

Screwing deck boards on a 50' pier or a 40' bridge can be done with a 120v drill motor, an inverter hooked to a kawasaki mule idling all day, its tiny start battery can not do it alone. the bridge deck was 2x6 with 8 screws/board, a total of 640 long screws.

In lieu of connecting a running vehicle batt to the RV to charge, one can use an inverter, battery charger and basicly have an inverter generator when needed. Folks with limited batt banks can use jumper cables from a running vehicle as load support for the inverter needs.

If I ever have multiple 6v batteries (4 or more) and plenty of solar I'd consider an inverter for 'hotel' loads like TV, cable, micro, ...

Same reasoning of not having MPPT$$$$$ when PWM works fine, is programmable, LCD display and monitored via cell phone!
With a big bank/big solar a smartsolar Victron fills the need.