Why are the new AGM (3) coach batteries unable to power fridge?
2018 Mercedes Sprinter 2019 Winnebago Revel Original owners. This RV does NOT have a generator. It does have 200w of solar panels. ZS 30A zamp solar controller. 2000w inverter. progressive dynamics converter #9245. 3 100 amp hour interstate marine deep cycle ... dual purpose batteries 200 reserve capacity each. They are mounted under the vehicle and weigh too much for us to mess with!
New this month! OUCH $500 each even though interstate charges direct customers $399.! 4 trips 8 man hours just shuttling! Went a couple of times to pick up our vehicle, ..not fixed.
We hadn't t used it much with the original batteries however. We thought the problem was the coach batteries. Went to Winnebago approved service center, had them replaced. Same issues. We know 50% is the max amp hours we can get out of the AGM batteries. If we turn anything on for less than a minute or 2 things go sideways!
BTW. Had our old batteries load tested after they were removed and they are good.
When we turn on the refrig with a fully charged battery bank the refrig makes too much noise. the Zamp controller shows 11 ish volts. (great NOVAKOOL refrig... very quiet and never a problem with it. Equivalent of less than 40w bulb) If we are on shore power, it is very quiet and works fine.
Something seems to be amiss.... Grounding? short?
If we turn on 3 led lights at the same time - reading is 11 ish or below (FULLY CHARGED)
After attempting "approved service centers" we are starting to understand that we have to figure it out!
Have taken a few trouble shooting steps. Want to take more, so am reaching out here to see if anyone is familiar with this particular vehicle.
I think we have been the experiment.... newer models have nifty things like a solar shut off switch (we have to unplug solar on the roof if we don't want the panels feeding in). Newer models have % of charge monitors for the batteries. Our model has the zamp controller, and a "one place" that shows Volts.
Lots of folks are ripping out brand new systems in these to put lithium batteries in.
Newer models come with Lithium batteries. We hear they have their own set of issues. For me ... there is NO WAY I want to sleep above a bank of batteries.
We need help and hand holding taking the troubleshooting one step at a time.WB TABLE OF CONTENTS Electrical
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http://catalog.winnebagoind.com/2018/18b...
must enter 9/19/2018 in cortona to get correct build. Link above
winnebago.com (far upper right search) 2019 Revel scroll down to "view all" It is a bit glitchy.
will show all the shematics listed on the table of contents
my internet is horrid slow. tried to upload the 7 docs that apply and it doesn't seem to get anywhere.
da Nancy