Last fall we purchased a used toy hauler with an onboard Onan 5500. It also has a residential fridge. We had the dealer install two golf cart batteries in place of the 12-volt batteries. The tech guy didn't tell us anything about the Xantrex pro display or its purpose. Yesterday I wanted to get an idea of how long the batteries could power the fridge. At 9:00 am I unplugged from shore power. My Xantrex Pro digital display showed 12.8 volts. When I came back 5 hours later, the display was showing an E05 code. I plugged back into shore power. This morning before I left for work, I checked the display again and it was still showing the E05 code.Does anyone know what that code means?Shouldn't 6-month-old golf cart batteries be last longer than 5 hours when powering a residential fridge?

Minimum Power Needed for a Residential FridgeThe minimum power for running solely the residential fridge for 24 hours is six AGM batteries totaling 600 amp hours (300 ah usable). PLUS you need 600 watts of solar power on the roof to replenish the batteries during the daylight hours.Mar 27, 2016

E05 Red Overload shutdownShort circuitReduce or disconnect the load. Make sure the load does notexceed the XM 1800’s output rating.Check connection to the load.Are you certain the inverter only powers the fridge?I assume you may need to cycle the inverter power off/on to get the inverter to restart.What is the battery voltage?

E05 Red Overload shutdownShort circuitReduce or disconnect the load. Make sure the load does not exceed the XM 1800’s output rating.Check connection to the load.The best way to remove the code is to disconnect from Shore Power and disconnect the Coach batteries for 5 minutes and then reconnect the Coach Batteries and plug into shore Power. Hopefully the code goes away. The Xantrex Pro---Can you tell us the Model? Your refer pulls minimal AC current, less than 300 watts, and almost any Xantrex Pro will power the refer OK. Did they install 2-6 volt Golf Cart batteries or 2-12 volt Golf Cart Batteries? Doug

Sounds like you need a battery monitor, and 2 more batteries. Resi fridges get hungry.

Need Some help with my battery system | Good Sam Community

23 Replies

dougrainer
Nomad
May 29, 2021
wa8yxm wrote:
Which Xantrex?
On the Prosine 2000 the on/off on the inverter is a true on/off OFF is OFF and I mean OFF no power passes through it not 120-120 not 12-120 or 120-12 NOTHING moves and the remote is dead

On the remote it is an Operate/Standby switch (Does not turn it off just disables it) leave it on.. Why. When on shore power automatic switches do the same job and if shore power is lost.... My TV's did not blink

Freedom 2000 is a bit different (no "Big" switch) but effectively the same Leave on

If you would READ the posts you would know which Xantrex. He posted below 24 hours before your post.

My model is the Xantrex Pro XM1000. I just unplugged it from shore power and hit the disconnect switch
wa8yxm
Explorer III
May 28, 2021
Which Xantrex?
On the Prosine 2000 the on/off on the inverter is a true on/off OFF is OFF and I mean OFF no power passes through it not 120-120 not 12-120 or 120-12 NOTHING moves and the remote is dead

On the remote it is an Operate/Standby switch (Does not turn it off just disables it) leave it on.. Why. When on shore power automatic switches do the same job and if shore power is lost.... My TV's did not blink

Freedom 2000 is a bit different (no "Big" switch) but effectively the same Leave on
dougrainer
Nomad
May 28, 2021
1. If you want LONGER Refer run time, install 4 to 6 Batteries. A larger Inverter yields no extra run time.
2. The ON/Off switch is to turn the INVERTER On and OFF. Your Inverter has a Pass thru 120 relay. When the Genset or Shore Connected and the Inverter OFF, the 120 pass thru and powers the refer. When ON and you are connected to Shore or Genset, the 120 still passes thru, BUT, disconnect the Shore or Genset and the Inverter now comes alive and Powers the refer. Doug

PS, Jayco and a lot of other Large 5th wheel makers have battery compartments that will hold up to 6 batteries when you have the residential refer.
BFL13
Explorer II
May 28, 2021
mrad wrote:
Sooooo....Do I need a bigger inverter/converter or more batteries. I should state the only time I will be using battery power would be if I brought the rig to work to leave from there.

Also, why does the Xantrex have an on/off button on the readout gauge? When should it be on, and when should it be off????

You are saying once the RV is on the road, your "alternator charging " will keep the voltage up enough for the inverter to handle the surge and load until you get back on shore power.

True if the inverter to batt wiring is fat enough--that is an issue.

For the rest, you don't need to buy anything or do anything if the time at work can be without opening the door of the already cold fridge. You can get ice to put in the fridge. You can wait till you get there and then buy foodstuff that needs to go in the fridge.

Or just don't take it to work and suffer the extra time from going back home to get the rig. What is worse?

Turn off the display when you are in storage with no shore power and want less draw from the batteries.
StirCrazy
Moderator
May 28, 2021
mrad wrote:
Sooooo....Do I need a bigger inverter/converter or more batteries. I should state the only time I will be using battery power would be if I brought the rig to work to leave from there.

Also, why does the Xantrex have an on/off button on the readout gauge? When should it be on, and when should it be off????

I would say both. a 2000watt inverter and two more batteries. an average fridge will use up to 8 amps on start up and a 1000 watt inverter just doesn't cut it.

Steve
mrad
Explorer II
May 28, 2021
Sooooo....Do I need a bigger inverter/converter or more batteries. I should state the only time I will be using battery power would be if I brought the rig to work to leave from there.

Also, why does the Xantrex have an on/off button on the readout gauge? When should it be on, and when should it be off????
MEXICOWANDERER
Explorer
May 27, 2021
There will be other hotel loads. My 24 volt freezer consumes 121 amp hours 24 hours, x2 when thinking energy in 12 volts.
BFL13
Explorer II
May 27, 2021
mrad wrote:
My model is the Xantrex Pro XM1000. I just unplugged it from shore power and hit the disconnect switch

Might have been knocked out by the "surge" amps on start-up and each time the fridge cycles on. 1000w should be ok , but does need fat DC wiring to the batts for that surge not to cause low-voltage shut-down.
mrad
Explorer II
May 27, 2021
The disconnect worked. The Xantrex is not reading 13.7v
mrad
Explorer II
May 27, 2021
My model is the Xantrex Pro XM1000. I just unplugged it from shore power and hit the disconnect switch