Just finishing the install of a Samsung in our 95 U280 and not sure if the original inverter/charger will safely power the new refrigerator or if I need to install a pure sine wave inverter. Tom
Tom,
We ran our Samsung off the factory original Taytronics I-1500 modified sine inverter for almost a year with no problems. Then we upgraded to a Magnum. The Samsung seems to be pretty tolerant of less than pristine power supply quality. Just keep a close eye on your battery voltage - we had the old inverter shut down in the middle of the night a few times due to low battery voltage. Since the inverter upgrade, using the same two AGM8D batteries, this has never been a problem.
Tom, Best practice will say that most electronics stuff works better and will last longer on a pure sine wave inverter. You may do OK on the OEM inverter. You can find pure sine wave inverters for not much money. I found a 1,000 watt PSW Magnum inverter for under $200. A 600 watt inverter would probably be enough especially if you are not making ice. Use a Kill-a-watt meter to determine average load and peak loads. You should be able to connect both inverters to the same set of batteries.
Agree with Roger, run my 22 cf samsung on a xantrex psw 1000. One note of caution, my samsung has some small leakage to ground on defrost circuit. {Samsung says this normal] that will trip the gfi on the inverter. I changed my gfi to a normal receptacle, so no problem. But keep this in mind if you get a xantrex psw, you might have this problem.
Jim
Samsung takes the incoming AC and turns it to DC so you will be fine with the own setup.
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Samsung fridges do their own power conversion so they don't require pure sine.
This Samsung is an inverter style refrigerator? Variable speed load sensing compressor? Sounds like the front end of power supply is a VFD, impressive. Bet it's efficient.
Which models of Samsung does this include? I'm going to replace our Dometic or repair, new coils.
How the Digital Inverter Compressor Has Transformed the Modern Refrigerator... (https://news.samsung.com/global/how-the-digital-inverter-compressor-has-transformed-the-modern-refrigerator)
I have seen a couple different answers on this ... looks like the digital inverter compressors are pretty efficient. Variable speed continuous operation. One comment was concerned about everything else in the refrigerator, electronics, controls, ice makers, in-door water and ice dispensers.
There are different types of modified sine wave inverters, some simulate a pure sine wave better than others. A fairly low cost pure sine wave inverter won't hurt.
Xantrex 458 modified sine wave killed 2 Cuisinart coffee makers before I realized I needed pure sine for the display to not fry. Installed Xantrex 3012 and no problems since.
As a retired electronic engineer, "pure sine wave" is the answer! ^.^d
Here is a stand alone inverter, Plenty for a res refrigerator.
Xantrex 900 watt True Sine Wave inverter $236
Amazon.com: Xantrex 806-1210 PROwatt 1000 SW Inverter: Xantrex: Cell Phones... (http://amazon.com/Xantrex-806-1210-PROwatt-1000-Inverter/dp/B002I04A74/ref=sr_1_7?ie=UTF8&qid=1476647060&sr=8-7&keywords=pure+sine+wave+inverter)
and one for $228
Amazon.com: Sunforce 11240 1000 Watt Pure Sine Wave Inverter with Remote... (http://www.amazon.com/Sunforce-11240-Inverter-Remote-Control/dp/B000WGNNUQ)
But, you will need one with an internal ATS or buy a separate ATS.
Yes, unless you are just going to run the refrigerator on an inverter circuit all the time as many do. A smallish charger that does multiple banks will maintain the start batteries will charge dedicated batteries for a refrigerator inverter when you are plugged in. Or if it is connected to the house batteries the primary inverter/charger will charge those. This battery bank is connected to the third bank post on the zero voltage drop isolator so they get charged while driving.
Am I missing something here? My 3 house batteries are 4 yrs old. I want more total amp hr capacity, say add two more 8Ds. I don't want to mix battery ages. I don't want to buy five. And if I did I don't want to have to buy five at once again. so a second battery set, new now, running a dedicated inverter circuit just for the refrig seems to make sense. This inverter only outlet for the refrig would be right next to the existing landline/big inverter outlet. A small inverter has much less overhead losses than the original inverter. Most of the time I can just shut the big inverter off which will save about as much as the refrigerator uses.
Thanks for the feedback.
I run my fridge on dedicated inverter only, running directly to batteries. Main inverter/charger keeps batteries up, so no need to transfer fridge to shore or generator power.
Jim
If you don't have a dedicated battery for the refrigerator is there any reason to have a ATS ? I am not needing anything more than the 3 8D's to go 24 hours and still having 12 volts. When we camp the inverter is putting out 150 amps even for a while after reaching absorption.
No, you do not HAVE TO HAVE an ATS.
But you loose efficiency to heat at each "conversion". If you mostly drycamp, this is not a big issue.
But if you are on shore power most of the time, allowing the residential refrigerator to run directly on shore power is more efficient/less hard on charger and batteries than running a charger to convert 120 VAC to 12 VDC to charge the batteries and an inverter to take 12 VDC from batteries and make 120 VAC to run the refrigerator.
All the more reason to have a good solar array, that way the sun keeps your food cold.
jcus,
I have your U295 and the solar takes care of the Samsung refer.
John
John, you must have lost a couple panels, used to have 1000 watts.
Jim
Thought they were 160 each
John
Yes, getting my coach's mixed up. If it is sunny with 4 8d's and 800 watts you can probably run your fridge a long time without plugging in.
Jim
Solar doesn't works so well if you live where there are trees 🌲
Thanks Brett, I understand the energy loss issues but a simple switch powers the refrigerator off either source. It is the battery age mismatch that I am trying to work around. Lots of ways to do this. The LP refrigerators have the ice maker and maybe the freezer side running on a inverter only circuit full time.
I am using an additional 1000 watt inverter for Fridge/tv/stereo and one out let up front.
I know the fridge is smaller than the ones mentioned by Samsung but the circuit would be same. I followed Beamalarm-- Adding an additional inverter and this has worked great. Simple switch over with DpDT and battery switch. Uses less 12v than main one. Read it and see.
JohnH
I read this some time back John and that is where the idea for switching between circuits comes from. Great idea. I am just adding in a second set of batteries to the mix. The 1000 watt inverter from Magnum is much more efficient than the old prosine.. It has enough output to also power the front overhead circuit as well as the refrigerator.