Adding a hyundai 400w panel to a victron 100-20 mppt controller

[karalal]

Hi all I have been offered a hyundai 400w Hie-s400vg panel at a very good price
Would this damage my victron 100-20 mppt controller

 

[Phill D]

Although the 100 / 20 is a 20 amp controller I believe you need to have a margin between actual max output and the operating max of the controller.
So you may be on a sticky wicket.

But others will know better than I..

 

[Two on Tour]

Here's the spec sheet for the panel.

https://solarshop.baywa-re.lu/core/media/media.nl?id=975949&c=6376560&h=c9d4kDT_WvQ7ZwD-8BplDB1feI4H_7pyxtcIKSRVfltiAius&_xt=.pdf

 

[DBK]

The spec I found says the open circuit voltages is 46.6 volts so if the controller can handle this then I think you might be OK but I recommend contacting Victron. They do answer emails in English. From memory, their controllers can handle a larger panel but you only get out the maximum rated power of the controller.

 

[funflair]

As 100/20 is 100v open circuit and 20 amps I would say yes it will be fine.

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[Two on Tour]

The spec I found says the open circuit voltages is 46.6 volts so if the controller can handle this then I think you might be OK but I recommend contacting Victron. They do answer emails in English. From memory, their controllers can handle a larger panel but you only get out the maximum rated power of the controller.

The 100 part of the 100/20 is the open circuit voltage max.

 

[Two on Tour]

There will be a lot of watts wasted on the Hyundai 400 watt panel as the 100/20 is rated at 290 watts max on a 12v system.

 

[karalal]

Is £110 a good price for this panel

 

[Phill D]

Is £110 a good price for this panel

i would have said so, but will you get the best from it with the 100 /20 i am not sure.

 

[Two on Tour]

Will the Hyundai panel be the only panel on your van or is this an addition to an existing system ?

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[karalal]

Only panel on the van this will be a replacement for a 100w
I realise the victron 100-20 is rated for 290watts
I've looked at the price if 300w panels which are more expensive

 

[Two on Tour]

The downside is, it will only ever be a 290 watt panel when it's going through your Victron 100/20 mppt.

 

[Googlebot]

I think it will be fine, at the equator and pointing directly at the sun, then yes it will waste some power as the panel will perform at max.

My 350 watts have only ever given 21 amps around the solstice in the UK, this week I have been lucky to get 5 amps.

If it’s flat on the roof, it will be absolutely fine.

Just check with Victron first, they are expensive things to burn out.

 

[two]

The benefit of having an 'over-sized' panel is that you should be able to harvest more when the sun is low or sky is heavily overcast.
When sunshine is plentiful, who cares if some is wasted?

 

[autorouter]

The 100V limit is a hard limit, never to be exceeded. This panel won't get anywhere near that limit, even when cold. The 20A limit is a soft limit, any power higher than 20A at about 14.5V will be wasted. But to actually cause a problem it would have to be a lot more than 400W.

So as two says, it will fire up earlier in the day and continue later in the day than a 290W panel, and some waste will occur when it's generating lots of power anyway. Sounds like a good setup for more northern latitudes.

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