How long can you run a RV AC on Solar? 25C outside 19C inside
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- Опубліковано 22 лип 2024
- How long you can run an AC on solar will greatly depend on what your setup. We have 2 systems in our rv. One system at 12v and one at 24v which is what runs the AC.
The 24v system consists of 1200 watts at 36v into our Victron 100/50 controller which charges our 450AH 24v lifepo4 battery bank which finally runs our 3000watt/9000watt peak sungold inverter/charger
Hello, I enjoyed watching your video, We were able to run (1) AC unit from 12:00 noon on Monday with 100% until 5 pm the next day. We traveled from Los Angeles to Sacramento California. My Victron T70 showed that I had about 11% left on the batteries. I kept the AC unit on during this time period. I have a 3 door residential refrigerator always running and we used the microwave a few times to heat up some food. We didn’t use our generator.
We have a 2008 Fleetwood Expedition 38f class A motorhome
This is our system:
8 12v SOK 206Ah batteries
6 SolarWorld Sunmodule SW 345 XL Mono Solar Panels
3 Victron SmartSolar MPPT 150/70-TR Solar Charge Controller
1 Victron Energy 12V 3000 MultiPlus-II 2 x 120V
1 Victron Cerbo GX MK2 with the Touch 70
I was only able to run one A/C at a time otherwise the inverter would overheat.
If I had a change to do another system I would want a 48v system and 2 inverters running split-phase.
I am happy with the system, however, I will be adding a second Victron Energy 12V 3000 MultiPlus-II 2 x 120V. Or buy two 24V inverters.
Wow that sounds like a great system!
Our system probably would run the second one if I had soft starts installed on them but we are mainly just worried about the bedroom one working for now. As time goes on we will have grid power available so that we don't have to worry about cloudy days. I definitely think that a second inverter would have been a good call for us too but all this stuff starts to get expensive!
if you have enough solar panels to offset the hourly discharge, you should be fine using A/C during the day. correct me if im wrong but your test seems to assume that no one is doing normal activities like watching tv or using a laptop, which all generate heat, including the presence of a person. its easy to maintain a set temperature in an insulated, closed and empty space for an extended period of time. real challenge will come when you start living in it.
ive recently had to switch from eco mode on my A/C unit to an interval outlet (10 minutes on, 20 minutes off) to prevent the A/C from running continuously in 100°F weather. that adjustment allows me to generate enough charge during the day to maintain it through the night, typically dropping from about 80% to 20% state of charge overnight, considering other devices I have running. you should be able to check the trending tab on your shunt to see the state of charge results after an overnight run.
my system
10kW battery bank
1.6kW solar(averaging 1kW with load)
I get what your saying for sure. The test did include me opening the door several times and running the fridge. Mainly it was just a baseline attempt to see how it would react. We now have the RV parked at camp and I will do a follow up video now that it is properly summer here.
I didn't realize you lived in Canada as I-78 is in the NY area in the states. That explains you using Centigrade rather than Fahrenheit as we do here in the US. It got me all confused, having used F all my life, so I had to get out the C to F converter.
What kind and BTU A/C do you have? My front 14.5k btu Furrion draws about 3 times the power that my 12k btu 28.5 Seer-2 mini split does. I can only run my front A/C when the sun shines, (as I have a 4,400watt array on the roof of my MH) but I can run my mini-split 24/7 if needed in either cooling or heat mode off a 16.4 kwh, 48v 320ah battery. I run a residential fridge too. Like you, I have a separate 12v battery and solar array to keep it up with my 12v needs. Moral of the story: switching to a high efficiency mini-split heat pump will extend your run time greatly on your 11.5 kwh battery bank and may allow you save on propane by providing efficient solar powered heat too. Take care, Chip
@@SuperSushidog we have a furion 14.5. 2 of them actually but we are only concerned about the bedroom one. We spend very little time in the RV during the day so I just wanted to be able to use the AC in the evening and hopefully replenish the batteries the following day. Although this quick test seemed promising in our driveway 1200 watts of solar in the partially shaded site we permanently park it is not enough if it's 35c outside and above so it seems there may be some more changes in the future....