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Old 12-15-2018, 01:52 PM   #1
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Quartzsite 2018 Battery discharge rates

all planing my first trip with my New Anthem . I decided to test my Batteries
to see how they would hold up dry camping. So i unpluged the coach for 9 hours to see how the batts would sustain there.

OK first pic voltage plugged in at2:53 pm pic 7024
next 2:54 on inverters on pic 7026
7:51 on invertors on 5 hrs in pic 7027
9:55 on invertors on 7 hrs in pic 7029
11:52 on invertors on 9 hrs in pic 7030
11:55 back on shore power start charging 90 Amps pic 7031


all this was running
TV
Refer
sat box
wifi extender
winegard ant
Laptop charging

so after 9 hors voltage dropped to 12.4 volts

ive been going to Q dry camping for 15 years straight but this is my first all electric coach. so i wanted to get feel with what to expect. im told running my 12.5 kw gen 2 hrs in the am and 2 hrs in the evening all would be good.
any input is welcome

does this batt drain all seem normal to others dry camping
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Old 12-15-2018, 02:46 PM   #2
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Quote:
Originally Posted by N6CUS View Post
all planing my first trip with my New Anthem . I decided to test my Batteries
to see how they would hold up dry camping. So i unpluged the coach for 9 hours to see how the batts would sustain there.

OK first pic voltage plugged in at2:53 pm pic 7024
next 2:54 on inverters on pic 7026
7:51 on invertors on 5 hrs in pic 7027
9:55 on invertors on 7 hrs in pic 7029
11:52 on invertors on 9 hrs in pic 7030
11:55 back on shore power start charging 90 Amps pic 7031


all this was running
TV
Refer
sat box
wifi extender
winegard ant
Laptop charging

so after 9 hors voltage dropped to 12.4 volts

ive been going to Q dry camping for 15 years straight but this is my first all electric coach. so i wanted to get feel with what to expect. im told running my 12.5 kw gen 2 hrs in the am and 2 hrs in the evening all would be good.
any input is welcome

does this batt drain all seem normal to others dry camping
Ron,

Your battery drain looks very typical for an Entegra coach. Keep in mind that you started with 100% charged batteries so the second and subsequent days will not look as good because recharging batteries back to 100% on the generator is rather inefficient. The recharge time from 50% SOC to 90% SOC will take about 2-2.5 hours. To get the last 10% into the batteries will take another 2 hours of charging.

The generator run times will require a little experimentation but 2-2.5 hours in the morning and again at night before retiring for the night are right in the ballpark.

One observation about your pictures, is charger #2 turned OFF or does only one charger work with the the shore power you are hooked up to? While running on the generator you definitely want both chargers working at putting amps back into the batteries to maximize your run time.
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Old 12-15-2018, 02:49 PM   #3
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If you read 12.4 volts, with all of that stuff still running, your in real good shape.

If you averaged 15 to 20 amps per hour that's 135 to 180 AH from your battery bank. 2 hours of charging should replace 100 to 150 AH with 100 amps of charging.

You don't say what your battery capacity is.
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Old 12-15-2018, 02:58 PM   #4
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If it’s something you plan on doing frequently...do yourself a huge favor and install a Victron BMV-712 battery monitor.

The color charts are just a wee bit better than nothing. Especially, on an all-electric coach. You will have to skew the numbers to reflect the voltage based on applied current demand. The BMV will tell you how many aHs have been used...and give you a SOC reading as a percentage which is easy to interpret and a much better representation regardless of your loads.

Not essential...but very nice to have.
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Old 12-15-2018, 06:40 PM   #5
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Ron,

Your battery drain looks very typical for an Entegra coach. Keep in mind that you started with 100% charged batteries so the second and subsequent days will not look as good because recharging batteries back to 100% on the generator is rather inefficient. The recharge time from 50% SOC to 90% SOC will take about 2-2.5 hours. To get the last 10% into the batteries will take another 2 hours of charging.

The generator run times will require a little experimentation but 2-2.5 hours in the morning and again at night before retiring for the night are right in the ballpark.

One observation about your pictures, is charger #2 turned OFF or does only one charger work with the the shore power you are hooked up to? While running on the generator you definitely want both chargers working at putting amps back into the batteries to maximize your run time.

i have charger #2 shut off because im on a 15 amp curcuit
and Entegra says anything under 30 amp turn invertor #2 off and it is
i also went to Vega touch and set shore power to 15Amp draw there too
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Old 12-15-2018, 06:42 PM   #6
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If you read 12.4 volts, with all of that stuff still running, your in real good shape.

If you averaged 15 to 20 amps per hour that's 135 to 180 AH from your battery bank. 2 hours of charging should replace 100 to 150 AH with 100 amps of charging.

You don't say what your battery capacity is.
4 L16's AGM 6 volts and 390 amp hours each standard on Anthem
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Old 12-16-2018, 06:35 AM   #7
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Quote:
Originally Posted by C.Martin View Post
If itís something you plan on doing frequently...do yourself a huge favor and install a Victron BMV-712 battery monitor.

The color charts are just a wee bit better than nothing. Especially, on an all-electric coach. You will have to skew the numbers to reflect the voltage based on applied current demand. The BMV will tell you how many aHs have been used...and give you a SOC reading as a percentage which is easy to interpret and a much better representation regardless of your loads.

Not essential...but very nice to have.

On most pre 2017 Entegra and any year Aspire or lower, the Magnum ME-BMK would be the logical choice for a SOC monitor since it directly integrates with the Magnum ME-RC or ME-ARC remote display panels eliminating the need for an additional display and simplifying the wiring. However on a Vegatouch equipped Entegra there is no ME-RC, it's function is handled by a ME-RVC which is supposed to be able to collect BMK data and make it available to the RV-C network. Question is if the Vegatouch currently supports and can display data about the BMK from the ME-RVC. If not and Firefly was unwilling to add such support, then indeed a standalone SOC monitor like the Victron would be useful.
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Old 12-16-2018, 06:50 AM   #8
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4 L16's AGM 6 volts and 390 amp hours each standard on Anthem

Total capacity for the house bank is 780AH. Your discharge rate appears typical, but as Don said, expect diminishing returns after the first day. 4 hours per day gen run time split into 2 or more sessions is typical. Also suggest to start the gen to avoid very high inverter loads like from the microwave or a hair dryer. It's much more efficient to power those high current (150A+) loads directly, lead acid battery capacity is significantly reduced at high discharge rates (Peukert Effect).
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Old 12-16-2018, 03:25 PM   #9
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i have charger #2 shut off because im on a 15 amp curcuit
and Entegra says anything under 30 amp turn invertor #2 off and it is
i also went to Vega touch and set shore power to 15Amp draw there too
Ron,

That makes perfect sense.
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