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Old 03-10-2011, 22:53   #1
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MPPT Solar Controller

Crew. I have 2 BP Solar 85 watt mono's to mount on Clarity's hard dodger, and propose to install a MPPT controller; why not go for the most charge out of these long-lived units? Looked at Morningstar Sunsaver and Blue Sky Solar Boost. Does anyone have experience with, or a preference for either of these, or alternate suggestions? Cheers. Bill
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Old 03-10-2011, 22:54   #2
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Re: MPPT Solar Controller

Only have experience with the Blue Sky MPPT.
Happy and impressed with the unit, it does work: Almost like adding a 3rd panel to the set-up. (Got 2 Siemens 75 watt over the bimini top)
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Old 04-10-2011, 00:15   #3
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Re: MPPT Solar Controller

I have had a Blue Sky running 3 135 watt panels for 3 yrs and it has worked well.
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Old 04-10-2011, 00:29   #4
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Re: MPPT Solar Controller

Make sure whichever controller you buy it at least will charge at a boost and float voltage. Some of the Blue sky controllers only have one stage charging and they have cleverly written the handbook to imply that it has multiple stages.
The quality of the MPPT is important. The Blue sky controllers seem to use a very simple, and not very efficient, procedure of sampling the Voc and reducing this by a set amount to derive the Vmp. Morninstar are probably the same, but they do not provide any technical information so its impossible to say if their system is better or worse.

This controller looks to be the best option on paper.
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If you are thinking of a larger array in the future the Outback range are the best controllers, but the cost is not justified in your system
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Old 04-10-2011, 07:21   #5
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Re: MPPT Solar Controller

I am also looking to buy a MPPT controller. I have two friends with Blue Sky. Both have experienced failures (they actually caught fire!). Both have described their dealings with Blue Sky as unfavorable.

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Old 04-10-2011, 07:43   #6
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Re: MPPT Solar Controller

Quote:
Both have experienced failures (they actually caught fire!).
Sure would like more details on that..

Got any surveyor's report, statement from BlueSky or or copy of insurance settlement?
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Old 04-10-2011, 20:59   #7
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Re: MPPT Solar Controller

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Originally Posted by CSY Man View Post
Sure would like more details on that..

Got any surveyor's report, statement from BlueSky or or copy of insurance settlement?
Well, no. It wasn't my controller or problem. Both of them were cruising in the Carib and a burned up solar controller hardly fits into anyone's threshold of getting a surveyor, let alone filing an insurance claim. As for BlueSky communication, I only related the general impressions of the two people who interacted with them - I did not bother to collect a statement from BlueSky on a problem that wasn't mine.

If it helps, I witnessed one controller burn up and saw the other after it burned. Both of them went bad in the afternoon during a full sun day.

Being a third party direct witness to failing gear isn't exactly spreading rumors.

I think I missed your point.

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Old 04-10-2011, 21:24   #8
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Re: MPPT Solar Controller

I have had my Blue Sky 2000 for a little over a year now with out any issues. It is controlling 3 135w panels and boosts an average of 10 to 15% regularly. They do generate a great amount of heat on the back side so take care to keep everything clear so they have ventilation. If you think there is any chance you will get more panels definitely go for a bigger controller.
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Old 04-10-2011, 21:33   #9
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Re: MPPT Solar Controller

Bill, I've heard good tings about the Genasun controller. As I understand it, they are much more efficient with smaller arrays.



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Old 04-10-2011, 21:37   #10
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Re: MPPT Solar Controller

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Originally Posted by clarity36 View Post
Crew. I have 2 BP Solar 85 watt mono's to mount on Clarity's hard dodger, and propose to install a MPPT controller; why not go for the most charge out of these long-lived units? Looked at Morningstar Sunsaver and Blue Sky Solar Boost. Does anyone have experience with, or a preference for either of these, or alternate suggestions? Cheers. Bill

I have the sunsaver duo, about 12 months now, and am very impressed so far. It charges both banks independantly, probably the best couple of hundred bucks I have spent on the boat so far.
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Old 04-10-2011, 21:47   #11
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Re: MPPT Solar Controller

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Both of them were cruising in the Carib and a burned up solar controller hardly fits into anyone's threshold of getting a surveyor, let alone filing an insurance claim.
Oh well, I thought the controllers caught fire and burned the boats down.
If so, probably a good reason to get a surveyor's report toward an insurance claim or a claim againts the factory.
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