Adding an extra Solar Panel

Motoroamer

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That answers my question perfectly wildebus, thanks. Sorry I did'nt make the question clear, really I just want to leave the load terminals un-connected.

I had figured that the purpose of the load connection facility was to limit the battery current to 15amps and also, or more importantly, to protect the battery/ies (particularly lead, acid) from over discharge by disconnecting the load when the low voltage disconnect value is reached. The same is incorporated on my Morningstar which I already have connected up. I think it's a great feature in order to save your batteries in the case of accidentally leaving something switched on long term that would normally kill the battery/ies. It has on occasion shut down/disconnected, due to our Eberspacher starting up which can momentarily drawn a huge current but most of the time it's catered for as the Morningstar ignores a momentary high draw. I just did'nt know if the Victron would function if there are no connections on the load terminals.

As the huge panel and the Victron are just to be used.....'sometimes'......I'm planning for it to be clipped on as required and not to have to start a major re-wiring project. Enough of that already squeezing three batteries under the seats and tight fitting wiring.

Thanks to all who contributed, report to follow hopefully !
 

Nabsim

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A question Dave. I watched one of Will Prowse YouTube videos the other day where he was comparing mppt controllers. I didn’t watch it all as I got bored with it but one thing he said that stuck in my mind. That was NOT to use the load option on the controllers (all of them) but he didn’t say why on what I watched. I thinks it may have been something he covered in another video.
Anyway, I had never heard anyone say that and wondered if you knew why?
 

wildebus

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Most Victron kit has very good overload/surge management (the inverters can manage a massive overload for way longer than most other brands) but I don't know what the Solar Controllers can do (I think it is specified in the data sheet?).
Victron only fit the LOAD terminals to the smallest controllers now - the 30A and above have a "virtual load" which is a bit weird.
I don't have a real use for the Load output on my 100/20 MPPT but decided to connect the Battery Maintainer for the Starter Battery to it purely as you can use the Victron system to monitor the current on the Load. Like I said, no real reason to do that other than curisoity and "because it's there" :)
 

wildebus

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A question Dave. I watched one of Will Prowse YouTube videos the other day where he was comparing mppt controllers. I didn’t watch it all as I got bored with it but one thing he said that stuck in my mind. That was NOT to use the load option on the controllers (all of them) but he didn’t say why on what I watched. I thinks it may have been something he covered in another video.
Anyway, I had never heard anyone say that and wondered if you knew why?
I am not aware of any reason NOT to use them, just there is rarely a reason.
Intrigued me now as the young whippersnapper knows his stuff.

Now thinking this further ..... the load terminals can be generally configured to go on and off depending on various parameters, which would mean there would be a relay activating (this would be how the victron one must work - when the LOAD is enabled the BAT+ and the LOAD+ are linked). and that relay could be drawing (a tiny amount of) current. Maybe that extra current draw could be viewed as wasteful?
 
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Nabsim

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I am not aware of any reason NOT to use them, just there is rarely a reason.
Intrigued me now as the young whippersnapper knows his stuff.
Good, I was thinking that if you didn’t know what he meant you would dig it out :)
It’s is in a video where he compares solar controllers, he has a Victron in there and I think 5 others. Can’t remember how long ago it was posted but should be able to find in my history if you can’t find it 👍
 

wildebus

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Good, I was thinking that if you didn’t know what he meant you would dig it out :)
It’s is in a video where he compares solar controllers, he has a Victron in there and I think 5 others. Can’t remember how long ago it was posted but should be able to find in my history if you can’t find it 👍
I did a search and I saw this link with the same question raised on his forum - https://diysolarforum.com/threads/w...he-epever-mppt-solar-charge-controller.20726/

There is no answer explaining why Will apparently says this, but the replies to the question are very much of the "can't see why not" variety and which I would tend to go along with actually.
 

Motoroamer

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Don't you think saving killing a battery by accidentally over discharging is a good reason to use the load terminals though anyway ?
 

Nabsim

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I did a search and I saw this link with the same question raised on his forum - https://diysolarforum.com/threads/why-does-will-prowse-suggest-not-using-load-output-ports-on-the-epever-mppt-solar-charge-controller.20726/
There is no answer explaining why Will apparently says this, but the replies to the question are very much of the "can't see why not" variety and which I would tend to go along with actually.
That was quick lol, I knew it was right to ask you :)
Like I said it is the first (and only so far) time I have seen anyone say don’t use. Most of the manufacturers actually show something connected to load in their advertising blurb. It’s not something I have used to date so far
 

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