Victron SmartSolar 100/50 overpaneled with 1,000w?
- Thread starter Thorium
- Start date
Bud Martin
Solar Wizard
- Joined
- Aug 27, 2020
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- 4,843
VOC 37.6Vdc x 2 = 75.2Vdc, factor in 20% more for cold weather = 90.24Vdc which is under 100V Max PV Vin.
The excess power will be limited.
The excess power will be limited.
They also have an online calculator that will show you the victron controllers that will work with your setup: https://mppt.victronenergy.com/?locale=en
Thanks
I did use that calculator before posting and it did not list the 100/50 for my application, it listed the 150/70 (which is twice the price around $600) and can charge a full 1,000 watts Into 12v battery. I get why victron would say that is the right match for my panel array because if cost were no object it would be.
The 100/50 at $300 seems to be perfect for me when it can do 700 watts into the 12v (and otherwise fits the voltage/amp ceilings) due to my intended application below. I’ll actually be getting two, each paired to 1 kw of panels, so roughly the same Lexie as one 150/70 doing 1kw I’ll have two 100/50 doing 1.4kw.
I’m interested if anyone thinks there’s a Better plan that reaches the intended specs:
- get full battery charge (5.75 kWh usable, lifepo4 12v 560ah) during all seasons (assuming a reasonably sunny day) in Texas
- beats $1,250 (panels and charge controllers) — no cheating, needs to use victron (or comparable top tier) charge controller
My Current Plan to meet Specs:
- 2 kw solar panels (8x250w) — $600
- two victron 100/50 - $650
- Two identical arrays of 2s2p 250w panels, the used 250w panels from santan solar that will prowae recently featured (I expect they’ll rarely be going over 70% output anyways)
- each string of 4 panels going into a Victron 100/50, so each 1 kw array can charge up to 700w, for 1.4 kw peak charge
- charging into a 12v 560ah battery bank (8 of the prismatic 280ah cells)
- battery bank usable 5.75 kilowatt hours (using cells in the recommended 10-90% depth of charge range)
- therefore needs about 4 hours per day of panels reaching 70% (1.4kw) of rated output to get full 5.75 kWh charge
I’m a newbie and overpaneling doesn’t have the greatest info out there compared to some other topics (eg search YouTube for ”over paneling solar” and there is not a lot...).
Thats what is awesome about this forum… I can do a ton of research so I’m not abusing peoples time, then double check my understanding here with some DIY experts so I don’t go frying expensive gear. Catching something on fire, or electrocuting myself
I did use that calculator before posting and it did not list the 100/50 for my application, it listed the 150/70 (which is twice the price around $600) and can charge a full 1,000 watts Into 12v battery. I get why victron would say that is the right match for my panel array because if cost were no object it would be.
The 100/50 at $300 seems to be perfect for me when it can do 700 watts into the 12v (and otherwise fits the voltage/amp ceilings) due to my intended application below. I’ll actually be getting two, each paired to 1 kw of panels, so roughly the same Lexie as one 150/70 doing 1kw I’ll have two 100/50 doing 1.4kw.
I’m interested if anyone thinks there’s a Better plan that reaches the intended specs:
- get full battery charge (5.75 kWh usable, lifepo4 12v 560ah) during all seasons (assuming a reasonably sunny day) in Texas
- beats $1,250 (panels and charge controllers) — no cheating, needs to use victron (or comparable top tier) charge controller
My Current Plan to meet Specs:
- 2 kw solar panels (8x250w) — $600
- two victron 100/50 - $650
- Two identical arrays of 2s2p 250w panels, the used 250w panels from santan solar that will prowae recently featured (I expect they’ll rarely be going over 70% output anyways)
- each string of 4 panels going into a Victron 100/50, so each 1 kw array can charge up to 700w, for 1.4 kw peak charge
- charging into a 12v 560ah battery bank (8 of the prismatic 280ah cells)
- battery bank usable 5.75 kilowatt hours (using cells in the recommended 10-90% depth of charge range)
- therefore needs about 4 hours per day of panels reaching 70% (1.4kw) of rated output to get full 5.75 kWh charge
I’m a newbie and overpaneling doesn’t have the greatest info out there compared to some other topics (eg search YouTube for ”over paneling solar” and there is not a lot...).
Thats what is awesome about this forum… I can do a ton of research so I’m not abusing peoples time, then double check my understanding here with some DIY experts so I don’t go frying expensive gear. Catching something on fire, or electrocuting myself
As I think about this I’m considering 6 panels (1,500w) in 2s3p to a victron 50/100. Theae panels are so cheap, and I’m already paying the freight shipping overhead. So it’s only $100 to go from 4 panel 1kw to 6 panel 1.5kw.
Obviously a victron 50/100 can still only do 700w max to 12v.
3s2p would be:
- VOC 75.2 volts
- Max/short circuit Amps 26.55 amps
So both of these numbers are still well below the 100/50…
But is there a point where going too far above the 700w rated output to battery is too much? This would be double that in panel rating (1.5kw)
Obviously a victron 50/100 can still only do 700w max to 12v.
3s2p would be:
- VOC 75.2 volts
- Max/short circuit Amps 26.55 amps
So both of these numbers are still well below the 100/50…
But is there a point where going too far above the 700w rated output to battery is too much? This would be double that in panel rating (1.5kw)
chrisski
Solar Boondocker
- Joined
- Aug 14, 2020
- Messages
- 5,183
Depending on how you install them, getting the full rated wattage is difficult. On my rooftop RV panels that lie flat, the closest I came was about 60%. My portable panels, slightly over 100%.
If you are putting these things flat, you may rarely, if ever be clipping. If it is titled into the sun and you are “clipping,” You can always take 2 off the VIctron 100/50 and install an extra SCC like a 100/20 or 100/30. I have 3 SCCs A Victron 100/50 and two VIctron 100/30s.
Adding an extra charge controller later for me was to add extra panels that did not match current panels I already had to deliver up to 60 charging amps, which is the max my batteries can charge.
If you are putting these things flat, you may rarely, if ever be clipping. If it is titled into the sun and you are “clipping,” You can always take 2 off the VIctron 100/50 and install an extra SCC like a 100/20 or 100/30. I have 3 SCCs A Victron 100/50 and two VIctron 100/30s.
Adding an extra charge controller later for me was to add extra panels that did not match current panels I already had to deliver up to 60 charging amps, which is the max my batteries can charge.
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