Community Forums

Tony Lee · 04-22-2018, 02:59 PM

Quote:

at 100 amps draw just 1/1000th of an ohm would cost you one volt.

1/10th of a volt actually, but I doubt whether this is the OP's problem - more like this -

Quote:

The coach was at REV Dallas from 1 Dec to the end of Jan and the batteries were low when picked up. When I checked them after the coach had been running they read 10.5 so I don't know for sure how low they were before I checked them

The other thing I would question is the bulk charge being only 14.1 volts. Unless the batteries are special, that is probably too low.

C.Martin · 04-22-2018, 03:07 PM

Photo credit to : NealC’s Victron monitoring.

His shows an “All electric” coach with a residential refrigerator going and what the amperage and battery voltage are measured at the shunt.

Solar was done around 18:00 hrs...and woke back up approaching 06:30 hrs.

The amperage wiggle is the fridge compressor cycling. With a few plateau probably due to defrost cycles.

You can see the min battery voltage did not drop to 11.8 in 10 minutes...as was the principle complaint of the OP.

This coach is capable of going nearly 40 hrs without charge...on eight 6v batteries... With a similar drain the OP should be able to go almost 24hrs. A daily generator charge or solar would be needed each day. Instead his coach is reaching the point that many of us set our LBCO which dumps the Inverter in favor of preserving the batteries...in under one hour. Something is terribly wrong with his system to do this...

MisterT · 04-22-2018, 03:09 PM

your interface to the 'Equalize' function is going to be a part of the instructions within your interface system, which is obviously different from ours, and previous FW models, now that several manufacturers have moved to these 'all in one' interface screens.
It's probably there, but how to get to it is like me trying to figure out how to get to my Freightliner screen's management interface where you can reset your oil changes when they are completed, or change the number of miles before you receive 'service' alerts, etc. It only took me three days. : /

hdfxrs · 04-24-2018, 06:34 AM

Just had 4 new 6v golf cart deep discharge house batteries installed. Voltage drops to 12.2 in 10 minutes. Magnum remote control panel shows they have gone through bulk, absorb and float with 50a service connected.

CWSWine · 04-24-2018, 07:16 AM

Found a place that would sell me batteries and has a two week return policy. Going to install them today and see what happens.

CWSWine · 04-26-2018, 08:06 AM

I put in Bulbs and Batteries Duracell batteries with 215 Amp Hour 6 Volt batteries and replaced all 6 batteries. They were 89 dollars apiece but I had 15 percent coupon they honored. The also had 14 day return policy no questions ask and 1 year warranty.

I let them charge for 36 hours on 50 amp service. They went from Bulk at 14.7 volts to Absorption at 14.7 volts. When I went back out to the coach they were in Bulk at 13.7 volts but as soon as I turned off the shore power they were at 12.4 volts and fell to 12.3 volts in just a couple of minutes.

Had the inverter running, fridge, TV, Wally, lights and watched a movie. After 3 hours the voltage drop to 12.1 volts. The AMP meter in the Fire Fly system was bouncing between 13 Amps to as high as 20 Amps with the fridge running. Is this normal or is there still a problem?

Kbrede · 04-26-2018, 09:37 PM

Haven't seen this mentioned, make sure your batteries are wired correctly.
Was always disappointed in our battery longevity (dealer installed new batteries when we bought the unit in 2010. Interstate GC2). Replaced the batteries in 2016 with Trojan T125's. Come to find out the originals were hooked up wrong and we basically were just running on 1/2 of the batteries. We can now go all night on just batteries. Residential fridge, 3 DIRECTV DVR', 3 tv's, inverter, 2 computers & an exhaust fan is our normal load.
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