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Old 28-08-2017, 08:06   #16
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Re: Premium brand MPPT controllers - is he right?

The larger capacity ones do.

I believe long as the SC are mounted at the bank ambient good enough, especially if that isn't in a very temp-volatile spot.

Remember you can actually tweak the voltage precisely.
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Old 28-08-2017, 11:26   #17
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Re: Premium brand MPPT controllers - is he right?

Some advice, please. I have 4-80watt panels installed, each wired via a 10amp Shotkey diode to a common busbar that is then connected to a single, older(2013) ,Victron MPPT controller, and then to my house battery. With 675 amphrs of battery power but only 320watts combined solar power, would it be wise to: (1) use 4 controllers vs the single unit, and (2) change out my older panels( vintage 2011) for newer, and larger, panels....say something closer to 650 watts total?
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Old 28-08-2017, 13:17   #18
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Re: Premium brand MPPT controllers - is he right?

The idea of single SC per panel is not going to magically increase output, it is just taking advantage of Victron's low pricing model to optimize handling partial shading conditions, and for redundancy.

I suggest it for people looking at buying new controllers anyway, not cost effective IMO if you already have a good SC.

Might be worth starting your own thread for the more general "advice please" question?

Yes your ratio is very storage-heavy if solar-only, short answer is always yes put in more solar 8-)

but have you also already got a genny and high-amp mains charger?

What are your sailing / liveaboard and electric usage patterns, and how are you finding the system works for your needs in that context?
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Old 28-08-2017, 13:24   #19
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Re: Premium brand MPPT controllers - is he right?

+1 for Victron 75/15. love mine. Keeps my 4x6v GC batts, windlass batt, and start batt in great shape with 2x100w flexible solar panels.
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Old 28-08-2017, 14:57   #20
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Re: Premium brand MPPT controllers - is he right?

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Originally Posted by DeepFrz View Post
Victron gets good reports on here.
I agree Victron is good.
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Old 28-08-2017, 15:10   #21
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Re: Premium brand MPPT controllers - is he right?

I've got a Midnight Kid. It's been absolutely fantastic. Everything is tweakable, and it can charge based on current acceptance to the battery - not just voltage profiles. (Important sometimes with house loads)

I think handybob should never be the last word on something involving electrons. But that's just me.
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Old 28-08-2017, 15:33   #22
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Re: Premium brand MPPT controllers - is he right?

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it can charge based on current acceptance to the battery - not just voltage profiles.
I thought the Whizbang Jr was required for that?
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Old 28-08-2017, 15:46   #23
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Re: Premium brand MPPT controllers - is he right?

+1 for Victron as well. - found their application also very helpful in planning our system:

https://www.victronenergy.com/upload...-Calc-2_5.xlsx

dg
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Old 28-08-2017, 22:07   #24
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Re: Premium brand MPPT controllers - is he right?

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Originally Posted by ErikFinn View Post

BTW Victron "Smartsolar" MPPTs appear to have bluetooth built in, no dongle required. The "Bluesolars" require the dongle for customised settings.
Smart MPPT controllers from Victron have the bluetooth chip built in and do not need the dongle. They are starting with the largest and working down to the smaller units. Smart 75/15 is expected by year's end.

ps There are 3 ways to make all adjustments to a Victron MPPT controller. The bluetooth of course, with Victron's MPPT monitor, and with free software from Victron and any laptop. The last one needs a connecting cable available from Victron dealers.
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Old 29-08-2017, 07:01   #25
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Re: Premium brand MPPT controllers - is he right?

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Never heard a Morningstar user complain. That speaks volumes to me.
Come to think of it, I also don't remember I've heard anyone complain about Morningstar.
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Old 29-08-2017, 07:52   #26
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Re: Premium brand MPPT controllers - is he right?

Update:I ordered 2 pieces of the Victron BlueSolar 100/30 MPPT controllers plus bluetooth dongles. I want to thank John61ct for bringing up the shading factor and all his kind advice as well as all other kind contributors. Fortunately this came up as my 8 panels are located 4 on each side of the boat and both sides are at different angles to the sun. I remember having read that with such a setup all panels connected to just ONE single MPPT the side receiving less sun would dictate the controller's maximum power point and the side receiving better sun would not be able to get the harvest through the controller optimally due to incorrect power point. By having a separate dedicated controller for both sides (and both sides therefore having their own maximum power point determined by their own MPPT sc) I'm hoping to obtain better harvesting results. As my panels are now, when heeling during sailing and depending on the time of day, the panels might be at about 90 degree and about 10-20 degree angles to the sun, so very different angles there.

Since these Bluesolar controllers do not have battery temp sensing, anyone out there is using permanently installed temp gauges to measure the battery bank temperatures, in order to keep track of what's happening in the bank?
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Old 29-08-2017, 10:24   #27
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Re: Premium brand MPPT controllers - is he right?

Do put the controllers right close to the bank so at least they're getting the same ambient.

And just IMO for the record, not being disputatious and besides the "two angles" issue, any partial shading would be handled better by finer granularity of panels per controllers, ideally 1:1 using the fact that 75/15 is less than half the price of the next step up.
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Old 29-08-2017, 10:34   #28
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Re: Premium brand MPPT controllers - is he right?

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I thought the Whizbang Jr was required for that?
It is.
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Old 02-09-2017, 04:52   #29
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Re: Premium brand MPPT controllers - is he right?

You will not go wrong with TriStar.
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