Morningstar SunSaver Duo solar charge controller charging 2 batteries with 1 solar panel

Morningstar SunSaver Duo solar charge controller charging 2 batteries with 1 solar panel


Hi, this is Amy from the altE Store. I wanted
to give you a quick little demo of the Morningstar SunSaver Duo PWM charge controller. Now what
this charge controller can do is a little bit different from most charge controllers.
It can actually charge two separate battery banks, completely different battery banks,
from one solar array. So you can have two battery banks sharing one or more solar panels.
It can handle up to 25A, and it is PWM, so it is 12V only, so it needs to be a 12V array
and a 12V battery bank. But, what you can do is if you have an RV or a boat, or something’s
that got two different battery banks, like the cabin house bank and the starter battery,
and you want to keep them charged with solar, you can use this one charge controller
share the array, and charge them both. So what I’m showing here, is we’ve got the SunSaver,
it’s connected to one solar panel right now, but again, you can connect it up to 25A of
solar, and it’s connected to two different batteries. Now I can actually configure it
to either it both be sealed batteries, both be flooded, or one be sealed and one be flooded,
you’ve got configuration abilities so that if they have got a different charging profile,
you can charge them differently. And they don’t have to be the same size, or anything,
because they are completely independent from the other, it manages the two different battery
banks. Now you’ve got another setting, with just the flip of a switch, I can send the
power 50/50 between the two battery banks, or, if have one that’s a priority and I want
to send most of the power to it, I can flip a switch and send 90% of the power to one
battery bank, and send 10%to the other. Now it does come with this remote meter that connects
with a pretty long cable, so you can actually put the meter elsewhere in the boat or RV,
and it doesn’t have to be right by the batteries. And that way you can keep an eye on it. It’s
got a lot of different things that it shows you, you can flip between your batteries,
battery 1 and battery 2, but it’s showing you the amps in from the solar. So I’ve got
1.4A coming in from the solar. Now what you can see with these two meters, I’ve got the
meters going from the charge controller outputs to the 2 separate batteries, and you see that
it’s popping back and forth. It sends all of that 1.4A to one battery, then all to the
other, and back and forth, and back and forth. As the sun changes, and the clouds change
a little bit, you’re going to see different numbers here. But this is all happening very
fast, so you might not be seeing this real time, but it’s very fast. So it’s 50%, I can
actually go in and change it to be 90/10. So it’s going to stay on one battery longer,
for 90% of the time, and then switch over to the other one, and then go back. So again,
this meter has a lot of different capabilities of what you can see, you can actually scroll
through it and it’ll show you the accumulated amp hours that it’s sent out, you can go to
the battery and it’ll tell you the maximum voltage of the battery, the amp hours going
into it, the minimum voltage that it’s been. It just gives you a lot of different information
so you can really remotely, in a different part of the boat or the RV, you can keep an
eye on your battery bank, and make sure that everything’s going well and it’s being charged
up nicely. So, I hope this was helpful, if so, give us a like and a share. And be sure
to subscribe to our altE Store channel, so we’ll notify you when we’ve got more videos.
And make sure to go to our website at altEStore.com, where we’ve been making renewable doable since
1999.

6 thoughts on “Morningstar SunSaver Duo solar charge controller charging 2 batteries with 1 solar panel

  1. Interesting! This gave me an idea. For guys like me who have three strings of batteries, why couldn't someone design a solar charger (like the Classic or FM80) that has battery bank/string balancing built in? Kinda like those diode isolator switches guys have in their dual battery pickup trucks. That way one battery doesn't discharge trying to charge the other battery. String balancing battery banks can be problematic, but if the solar charger can do the balancing (and have two/three/four POS & NEG outputs) that would excellent! You inspire me Amy…thanks!

  2. Could you use it to maintain multiple single batteries for things that are often stored? Like an RVs, motorcycle, snow mobile etc.

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