开云体育

Does a trickle charger connected to the main battery result in the
coach battery also being charged or do I need to run a separate charger
for each battery?

Thanks,

Mike.

If you are asking about an EVC, I think (but am not totally sure) that the key would have to be on for that to work. I do know that the coach battery has to be disconnected before doing an individual external recharge, to prevent possible damage to the normal coach charging system. The other, easier - but much slower - way to re- charge the coach battery is to just plug in the "Shore power" AC and let the built-in charger do it. That will NOT recharge your starter battery - use the trickle charger for that.

If your external charger has a "deep cycle" setting, use that for the coach battery.

Dave Richoux

Sorry, didn't think there would be differences...this is for an '02
Weekender...not the Camper.



--- In ev_update@..., David Richoux <tubaman@...> wrote:

If you are asking about an EVC, I think (but am not totally sure)
that the key would have to be on for that to work. I do know that

the

coach battery has to be disconnected before doing an individual
external recharge, to prevent possible damage to the normal coach
charging system. The other, easier - but much slower - way to re-
charge the coach battery is to just plug in the "Shore power" AC

and

let the built-in charger do it. That will NOT recharge your

starter

battery - use the trickle charger for that.

If your external charger has a "deep cycle" setting, use that for

the

coach battery.

Dave Richoux


On Jun 9, 2008, at 2:51 PM, tornadokc247 wrote:

Does a trickle charger connected to the main battery result in the
coach battery also being charged or do I need to run a separate
charger
for each battery?

Thanks,

Mike.


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The coach battery would not get any charge. It's connected to the
starting battery through an isolation relay that's open when the
engine's off. This is so you can use the energy in the coach battery
without running down the starting battery. I don't think that just
turning on the key causes the relay to close - I think the engine has
to be running.

--- In ev_update@..., "Ron" <ronsd@...> wrote:

The coach battery would not get any charge. It's connected to the
starting battery through an isolation relay that's open when the
engine's off. This is so you can use the energy in the coach battery
without running down the starting battery. I don't think that just
turning on the key causes the relay to close - I think the engine

has

to be running.

Ron,

In the EVC, the isolation relay is closed when the ignition switch is
in the "run" position. When the key is turned to the "start" position
the isolation relay drops out. This is to prevent the vehicle and
coach batteries from being connected together during engine cranking.
The wire and circuit breaker and/or fuse between the two would never
withstand the starting current.

A simple trick to charge the vehicle battery while plugged into the
shore line would be to take a short jumper with clips on each end and
connect it to the thin wire terminal on the isolation relay and the
+12 volt input to the relay. The isolation relay would then be
energized and both batteries would be connected together and would be
charged at the same time.

Richard Cox
2002HD Rialta
former '95 & '97 EVC

Mike -

On the EVC, the combiner relay is operated by
the ignition key - with or w/o engine running.
To confirm this on your van, compare voltage
readings on each side of relay, then do same
with key on - but engine off. I think you will
see them equal - within ~0.1V. You can also
check for voltage on small center relay coil
terminal, when key is on.

I often use the 'Key On' to transfer power
into the weaker battery [setting hand brake to
turn off headlights]. I often connect trickle
charger to the relay terminals - one or both.
I plan to add a 1' lead with Twin-Bullet
connectors, to give small charger access to
either battery, w/o removing battery cover
for relay access.

You can equalize batteries without wasting
relay power with an alligator clip lead jumper
between the two large relay terminals. [This
clip lead is also needed when engine battery
is too low to operate the relay. If the lead
is too small to carry much current, clip it
from the small relay coil terminal to the
higher V of the 2 large terminals, with key
OFF. Remove jumper before cranking engine, as
the relay is un-energized during cranking.]

I equalize the batteries for a few minutes
before using a small 'jumper battery' to
assist starting.

Jack_son

===============================================
--In ev_update@..., "tornadokc247" <mdobbs@...> wrote:

Does a trickle charger connected to the main battery result in the
coach battery also being charged or do I need to run a separate

charger

for each battery?

Thanks,

Mike.

Why not use the built in coach battery charger to charge both
batteries. I assume this would require the jumper to allow current to
flow into the vehicle battery.

Rob

This is exactly what I do during periods of little use, like winter. Now
I'm thinking it's best to plug in whenever parked to keep that coach battery
fully charged.

Just make an alligator clip jumper out of 14 ga wire, and jump the two big
posts at the solenoid.



Stuart



_____

From: ev_update@... [mailto:ev_update@...] On Behalf
Of rvdalton
Sent: Monday, June 09, 2008 8:22 PM
To: ev_update@...
Subject: [ev_update] Re: Trickle Charging both bats?



Why not use the built in coach battery charger to charge both
batteries. I assume this would require the jumper to allow current to
flow into the vehicle battery.

Rob

--- In ev_update@yahoogrou <mailto:ev_update%40yahoogroups.com> ps.com,
"jack_son_73" <jackr1@...> wrote:

Mike -

On the EVC, the combiner relay is operated by
the ignition key - with or w/o engine running.
To confirm this on your van, compare voltage
readings on each side of relay, then do same
with key on - but engine off. I think you will
see them equal - within ~0.1V. You can also
check for voltage on small center relay coil
terminal, when key is on.

I often use the 'Key On' to transfer power
into the weaker battery [setting hand brake to
turn off headlights]. I often connect trickle
charger to the relay terminals - one or both.
I plan to add a 1' lead with Twin-Bullet
connectors, to give small charger access to
either battery, w/o removing battery cover
for relay access.

You can equalize batteries without wasting
relay power with an alligator clip lead jumper
between the two large relay terminals. [This
clip lead is also needed when engine battery
is too low to operate the relay. If the lead
is too small to carry much current, clip it
from the small relay coil terminal to the
higher V of the 2 large terminals, with key
OFF. Remove jumper before cranking engine, as
the relay is un-energized during cranking.]

I equalize the batteries for a few minutes
before using a small 'jumper battery' to
assist starting.

Jack_son

===============================================
--In ev_update@yahoogrou <mailto:ev_update%40yahoogroups.com> ps.com,

"tornadokc247" <mdobbs@> wrote:

Does a trickle charger connected to the main battery result in the
coach battery also being charged or do I need to run a separate

charger

for each battery?

Thanks,

Mike.

Hi Stuart--

Following this battery thread, If you have a true deep cycle battery they
need a different type of charge that the converter should provide.
Converters not only convert 110V AC to 12V DC but act as charger for deep
cycle batteries. These units are made to give a true deep cycle the type of
charge they need (high voltage ). In fact at one time we had golf cart
batteries for our cabin and when we switched from a Sears wheel charger
(like the ones that service stations have) to a small converter for charging
the difference was astonishing. We even had a converter hooked up to a 12V
pump to pump water out of a spring using a generator.
While a trickle charger will keep the starting battery in good shape in idle
times the rear battery should be hooked up to shore power--if not full time
,since I'm not sure what kind of taper these particular units are set up
for, at least a couple of days a month and a couple of days before a trip.
I think that the jumper idea is good for short term stuff (like helping get
started ) but I wouldn't do it long term without researching the solenoid
specs first.
Hope this helps

Forest