I would never recommend a 1,500 watt inverter- even though I have one in my motorhome. I rarely use that inverter, because it draws about 3 amp hours just to have it on. So while watching TV, and running the satellite dish, VCR or whatever, it might be using a total of 8 or 9 amp hours. If I changed to a 150 watt inverter, it would only draw about 4-5 amp hours. Saving 4 amp hours per hour of watching TV is very important with limited battery power, and my desire to watch TV about 8 hours per day.
I could go through about 120 amp hours in 24 hours. My 415 watt solar system made up for all this power. Any more power, and I could run the generator. In the morning worked best, as the charger will put out more amperage to the nearly dead battery bank than to one 90% full.
at 50% full, my charger can put out 45 amps per hour. At 80% full, I would be lucky to get 20 amps out of the charger.
The solar system normally put out about 22 - 25 amps around noon, a little more if the battery was low, and less amps as the battery became full.
Good luck,
Fred.