well good morning youtube we're out in the garden shed today this is the mt-50 remote display that's
on my 20 amp solar charge controller out here and you can see we're bringing in about a tenth of an
amp at 40 volts from the solar panels i've got a pair of 12 volt lead acid batteries in parallel
they're being charged right now again my dc load is zero right now if i turn on a light
we jump up to seven tenths of an amp so i've got my load hooked up off of here so i had a
viewer ask a question here this is obviously a 12 volt system got 12 volt batteries this viewer has
a similar setup he's got a 12 volt battery and he was concerned because if he goes down here to the
device information it says 24 volts am i going to burn up my 12 volt batteries because this says 24
volts how do i change this the short answer is this is just the name plate data for the charge
controller it's rated for up to 24 volts this charge controller is rated at 20 amps charging
current and then also 20 amps on discharge current or the dc load but this has nothing to do with the
setting of the output that's down here in the control parameters so if i go down here
i've got battery type i have a user type set in there then on the second screen if you go in here
and i want to change something i can go over here there's auto voltage detection the default setting
on these is they're set up for automatic detection but i could hard code this for 24 volts or i could
hard code it for 12 volts i just prefer to leave it on auto and let it pick the right voltage
probably the only time you might do the fixed settings is if you have some weird battery setup
that confuses the thing and it picks the wrong voltage so that's control parameters tell you
what voltage this is set for the device info just tells you what the unit is capable of so those are
two different things so let's go look at the other 12 volt charge controller that i'm running right
now just to show you that that's the case okay so this is the second mt50 that i have this is hooked
up to my 40 amp charge controller and you can see we're running 12 volt battery here this hooked up
to a 12 volt lead acid battery bank and i've got 27 volts coming in and that's actually coming in
off of my 24 volt lithium ion battery bank so this system here is set up to power my dc loads and to
keep my old 12 volt battery bank charged and if we go in here and if i go to device information
you can see this controller actually displays the model number so it's the 4215bn model
rated voltage 24 volts i'm running it 12 volts its rated charge current is 40 amps
and its rated discharge or dc load current is 20 amps and if we get back out of there if we
go down to control parameters i've got the auto voltage set and it's running on a 12 volt lead
acid battery but still showing 24 volts on this screen here and if we go up there device info
24 volts that 24 volts is just the name plate rating of the charge controller it has nothing to
do with how it's set up what it's uh configured for that's just the maximum output that it has
so anyway hope that clears up that question and yeah if you have any more questions about these
mt50 displays or the charge controllers setup feel free to post up in the comments
section below i might not know the answer but there's a lot of really clever viewers that
respond to questions as well and as always thanks for watching