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1L243

Oregon

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Posted: 11/14/21 05:55pm Link  |  Quote  |  Print  |  Notify Moderator

I've decided to add a simple auto transfer switch to my solar system.

I was looking at Go Power which from a video I watched said made by Progressive Dynamics for Go Power $76. Progressive Dynamics makes a similar unit but is their brand for $100.

Any recommendations or thoughts


2017 Coleman 300tq by Dutchman Toy Hauler. 34.5 feet long and under 10k Gross. 500 watt Solar 2000 watt Inverter, 1999 Ford F250 2WD 7.3 4R100 DP Tuner, S&B Cold Air Intake, Gauges, 6.0 Trans Cooler, Air Bags.


Bobbo

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Posted: 11/14/21 07:52pm Link  |  Quote  |  Print  |  Notify Moderator

I'm not sure that I understand. Solar is supplying power to the battery. I am assuming that your transfer switch will supply power to the battery from another source. It is not necessary to disconnect the solar from the battery when you add another source to power the battery. My solar is ALWAYS connected whether I am using the 12v umbilical from the tow vehicle, the power pedestal, a generator, or no other power source besides the solar.

(I do have a disconnect switch between the solar panels and the solar controller. It doesn't "transfer" to anything else, just kills power to the controller.)


Bobbo and Lin
2017 F-150 XLT 4x4 SuperCab w/Max Tow Package 3.5l EcoBoost V6
2017 Airstream Flying Cloud 23FB


1L243

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Posted: 11/14/21 10:40pm Link  |  Quote  |  Print  |  Notify Moderator

My transfer switch I want to install will switch automatically between the inverter and shore power.

I refer to it as part of my solar system since I installed it all together as a system.

time2roll

Southern California

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Posted: 11/14/21 10:54pm Link  |  Quote  |  Print  |  Notify Moderator

Both function the same. Consider breaking out power to the converter from only the utility feed.


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Bobbo

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Posted: 11/15/21 07:31am Link  |  Quote  |  Print  |  Notify Moderator

1L243 wrote:

My transfer switch I want to install will switch automatically between the inverter and shore power.

I refer to it as part of my solar system since I installed it all together as a system.

That explains my confusion. You are not adding the ATS to the solar system, which charges the battery. You are adding it to the electrical system, which powers the RV. Even though you "installed it all together as a system," it is not "a system." It is a solar system, and a power system, which just happened to be installed at the same time.

time2roll wrote:

Both function the same. Consider breaking out power to the converter from only the utility feed.

VERY good advice.

pianotuna

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Posted: 11/15/21 08:41am Link  |  Quote  |  Print  |  Notify Moderator

Hi,

I added an auxiliary shore power cord intended to run just the converter.

I powered the RV from the inverter. I kept the batteries up by using a combination of solar and shore power.

The term used for doing this is "double conversion". I did it when mouchdocking with 15 amp shore power. It allowed me to run the RV as if it were on a 30 amp shore power.

If you do follow this path, be sure to have some spare fuses for the converter.

I can't see that a transfer switch would be particularly useful. It would need to be a "smart" programmable unit. Do you have a link to the video?

I've not done this since I got a hybrid inverter/charger with load support.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, soon to have SiO2 batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

goducks10

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Posted: 11/15/21 08:56am Link  |  Quote  |  Print  |  Notify Moderator

Anyone know if those transfer switches switch fast enough to keep the signal on a portable Dish sat? It only takes a sec and my Dish sat loses enough power and I have to reboot it.

time2roll

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Posted: 11/15/21 09:26am Link  |  Quote  |  Print  |  Notify Moderator

goducks10 wrote:

Anyone know if those transfer switches switch fast enough to keep the signal on a portable Dish sat? It only takes a sec and my Dish sat loses enough power and I have to reboot it.
Good chance the satellite box will reset. Although the power swap should not happen unexpectedly unless you have an autostart generator. If satellite is critical, may need to run full time on a small inverter.

2oldman

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Posted: 11/15/21 09:44am Link  |  Quote  |  Print  |  Notify Moderator

goducks10 wrote:

Anyone know if those transfer switches switch fast enough to keep the signal on a portable Dish sat?
I never found one that was, which is why I hard-wired my DTV box to the inverter.

Gdetrailer

PA

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Posted: 11/15/21 10:52am Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

goducks10 wrote:

Anyone know if those transfer switches switch fast enough to keep the signal on a portable Dish sat? It only takes a sec and my Dish sat loses enough power and I have to reboot it.
Good chance the satellite box will reset. Although the power swap should not happen unexpectedly unless you have an autostart generator. If satellite is critical, may need to run full time on a small inverter.


Most ATS units have a transfer delay which may be greater than 15 seconds.

It is done that way intentionally.

For Sat system receiver, ATS most likely will be too long of a delay.

I would recommend either directly wiring the sat receiver outlet to the inverter (without ATS function) or insert a small computer UPS unit.

Computer UPS units are a self contained inverter/battery/charger/ATS which feature very quick coordinated power switching between the built in inverter and the shore power source. Your sat receiver will never, ever know that the power switched from shore to inverter and back to shore.

I use a computer UPS unit to power my 50" TV, sat receiver and other TV related stuff at home. Prevents damage to those items during power blips/outages/brownouts.. Just had a 5 second power outage last night while watching TV from my sat system. TV and sat never blinked even though my homes lights did..

Just note, some computer UPS units may not like your inverter output..

Another way around all that mess is to buy a new inverter which already has ATS switching built in, these units act like a large UPS but without the limitation of small internal batteries. Much more expensive route and you will be limited on the circuits you want to power but going this route gets rid of the slow transfer times of typical add on ATS switches.

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