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02-07-2019, 03:11 PM #1
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Installing solar system, do I need a 2nd transfer switch
I am installing a 1200 watt solar system in my Momentum 397th. I have a Generator, with a ATS, and I am wondering if I need a 2nd switch, and if so can I use one for a generator? The Inverter is a 3500/7000. so it comes out to max of 58.6 amp. Will a 50amp ATS work?
2012 Chevy 3500 DRW DURAMAX
2016 Momentum 397th
TOY 2013 800 RZR LE
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02-07-2019, 03:29 PM #2
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What would be the purpose of the ATS? The solar is just charging your battery bank, it's not directly powering anything. You just need a solar controller between the panels and the battery bank.
Paul "Poppy" and Deb Cervone
2022 Imagine XLS 22MLE
2021 Imagine XLS 17MKE - SOLD ; 2015 Grand Design Reflection 337RLS - SOLD
2016 GMC Denali 3500HD SRW Duramax/Allison CC 4x4; Tire Minder TPMS
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02-07-2019, 03:44 PM #3
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02-07-2019, 03:47 PM #4
Installing solar system, do I need a 2nd transfer switch
What exactly comes to 58.6 amps?
Are you talking about total output of your solar? Reason I ask is because I have 1155 watts of solar but my output is 74 amps.
Or are you talking about the charger output of your inverter?
In which case 58.6 amps seems really low, as my 3000 watt inverter charges at 125 amps.
Sent from my iPhone using TapatalkResistance is Not Futile, It's Voltage Divided by Current.
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02-07-2019, 03:50 PM #5
Installing solar system, do I need a 2nd transfer switch
Last edited by DaveMatthewsBand; 02-07-2019 at 03:57 PM.
Resistance is Not Futile, It's Voltage Divided by Current.
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02-07-2019, 03:57 PM #6
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Oh boy...treading into waters where I'm not 100% knowledgeable from experience, but I've done a lot of research on this subject. So take this with a grain of salt--I'm sure someone else will chime in.
From what I understand, your solar will not be powering the inverter. Solar charges the battery(ies). The battery(ies) power the inverter. The diagram below is from https://two.ineedmorespace.co/solar_..._for_cabin.php (found searching Google images):
The ATS, in the diagram, is built into the inverter. The "AC Generator" in the diagram is synonymous with "shore power". In a system as shown in the diagram a second ATS is not required.
I wonder how many times I'll have to edit this...2017 Ford F-350 DRW 6.7L Platinum
2019 315RLTS (purchased 16 Jul 18 from Campers Inn RV in Byron, GA)
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02-07-2019, 03:57 PM #7
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A typical installation has a transfer switch to select between a generator and shore power. Most large inverters have an internal transfer switch to bypass the inverter when connected to shore power (or gen). If your inverter doesn't provide that function you could mimic it with a second transfer switch. Chances are you'll never pull over 50 amps from the inverter, so a 50A switch is probably OK.
Keith Regli
2016 Momentum 388m
2015 Silverado 3500HD DRW
[SIGPIC][/SIGPIC]
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02-07-2019, 04:00 PM #8
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02-07-2019, 04:19 PM #9
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02-07-2019, 09:50 PM #10
No power to RV
Today, 07:41 PM in Exterior