Hi,
I agree with the posts above, the panels are TINY! I had a pair of 45 watt panels, probably larger than those, and gave them away, they just don't produce much power. They now charge a small electric wheelchair battery (retired from the wheelchair, so condition not to great of one) and run a dozen or so 24 LED 5050 panels, each use about 0.15 amps. So perhaps 2 amps total load to light up my buddy's house. It worked great in the summer, when there was 14 hours daylight, and only 6 hours to run the lights. In the winter, it does not work so well. ..
My 120 watt solar panels will put out about 35 AH daily each. My RV uses about 35 AH just to run the propane leak detector, CO detector, and refrigerator each day.
What I found is if I have removed a total of about 120 amp hours from my 4 golf cart batteries every night, the 70 amp charger/inverter can put out 45 amps for the first 30 minutes, and will taper to less than 30 amps within 1 hour. At that point, I will shut off the generator, and expect to receive about 90 AH all day, sometimes I don't get that many amp hours, but most of the time I do.
If I end a long week of camping and still am -100 AH, then that is not a problem, because I stop camping, and the solar will fully charge it the next few days. I try to avoid running the generator mainly to save fuel, but also because I love the quiet solar system, and hate the Onan generator noise.
I have a E-meter and a shunt that carefully measures the amp hours going into and out the battery bank. This is similar to a "Trimetric" meter.
So my suggestion is to add a couple more solar panels.
SunElec.com sells them for close to $1 per rated watt. 100 - 150 watts is my suggested size. Larger than 150 watts, and finding real estate on your roof becomes really difficult.
You should also consider your options on the 120 volt charger. It seems like it is coming out of 'absorption charge' to quickly, and switching to a 13.2 volt holding charge rate to soon. What brand converter / charger do you have? What is it's amp rating?
When running your Onan, what output voltage are you getting? 110 or closer to 120 volts? Some chargers do not work well with a generator that only puts out 110 volts.
Good luck!
Fred.
