Originally Posted by themexicandoctor
For Glenn & Others,
Please be patient, I am slowly working my way around to the front of horse in the dark.
I know my Solar needs some fine tuning.
I know it's ridiculously hot.
I know the fridge is performing flawlessly but it is using 50ahs per day
I just realized that I may have my Battery Meter set up incorrectly.
I have 2x100ah Batteries but I have the bank set for 200 when in Truth, its only 100ah.
Should I change this?
As it is, I may not have truly reduced the amp hour debt from Saturday so at 2.15am when I got back I had to run the generator until 3.50am to get it at 100% for sure.
I did run the Generator for 25 minutes today but I was gone all afternoon & evening & the loss is real.
Very frustrating for a moment.
As to Lithium, I won't get involved with them but in working out will 200ahs run a dc fridge, yes.
But that's $1000 for the fridge
A $1000 for the battery.
Plus other electrical upgrades.
Especially if your needs are only that of some weekends camping.
We keep getting back to the 50% rule in AGM batteries, which IMO is really exaggerated, but if you are willing to haul around 60% more batteries to get the same capacity as taking a smaller bank to 20% SOC, that is your choice. It will save you about 15% in actual battery replacement costs over the years is all.
If you are going to hold fast on using 50% SOC as the lowest you want to use, you can set the meter to 100ah bank size, just like if you take them to 20% you could set the bank size at 140ah so it read zero SOC when you hit the limit. Most of us tend not do to those things are we prefer to see the actual SOC of the bank, not the % usable we have left, so personal choice. It will only affect the % reading, and nothing else, if the monitor is programmed to synchronize off voltage an amps.
IMO, even at 50ah per day of use for the frig, with 200ah of AGMs and the amount of solar the DR has, in sunny California, plus lots of driving, there is no reason that there should be any shortage of battery capacity unless there is a bunch of power going somewhere else or he sits in the shade a lot.
Can the frig do better than 50ah per day? Maybe, as that is running 100% of the time at 2.1 amps that has been measured. Turning up the compressor speed might help a bit to put it in a better efficiency spot for the conditions, and improved venting might improve it a bit for efficiency. At 100* or 3.1cf Isotherm was at about 40ah per day, so the DR is not that far off if he was at the same 38* internal temp that we run.