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Old 11-23-2021, 07:47 PM   #16
electric
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Brand: Thor Motor Coach
Model: 2022 Vegas 25.6
State: California
Posts: 51
THOR #24413
Quote:
Originally Posted by Chateau_Nomad View Post
Let's start with the MOST desired option... running that A/C. So, let's figure a setup that could run your 15,000 BTU A/C for maybe 5 hours. And this is ONLY the A/C running - nothing else.

Add up the cost of 75-100 kWh capacity of battery storage. Then, calculate how many 250 watt panels you would need (at average of 1 kWh per day of electrical power generation) to replenish those kilowatt hours each day. Solar panels cost an average of $1 per watt today. Name brand lithium batteries which can store/supply 12 kWh (100 AH) are about $750 each ($63/kWh).

10 batteries @ $750 = $7,500
75 250 watt panels = $18,750
These are wildly inaccurate numbers. How did you get from 15kBTU / 5hr to 75-100 kWh ? There is no logical connection.
There is much variation due to climate and insulation, but rough numbers for A/C is 2kW when compressor is on, which is typically not 100% duty cycle. Let's say 50% duty for sake of discussion, that makes 5kWh of A/C usage over 5 hrs. Very far from 75-100 kWh.
Check out FitRV channel on Youtube, he has very nerdy video on A/C consumption and how to compare apples to apples.
Many new rigs now come with 4kWh to 8kWh lithium banks and 400W to 800W solar. It's not cheap, but not as crazy as it used to be, it is becoming acceptable for many.
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