Hello & thanks
It looks like I need to stay with my (5) 200 watt panels on my 900 watt DC side wired in series & like you said, (2) 100 watt panels, wired in series on the 500 watt AC input.
jeff
daninus1
what panels are you using to get that 1400 watt input? brand & size & model?
thanks
jeff
I am using Trina Solar 255W panels, (bought used ones on ebay). I am over-paneling a bit…
On the main 900W input I am running a 3S2P configuration and for the 500W enhancer 2 panels in series. Total of 8 panels.
So using two of the 100 watt panels would be 44.2 volt (under the 60 max for the enhancer) - but I would be at 10.98 amps, which is .98 over the max (10 amps) for the enhancer. Is it possible that the little bit over in amps there will bring my whole system down?
jeff
I think if I just use another Rich 200 watt panel to go to the enhancer, it would work better for me.
Voltage would be 24.3 & amps would be 9.80
Better than two 100 watt units which push me over a bit.
Over amperage is not an issue. The enhancer will limit the current to max 10A even if you have more available from the panels. The unit is more sensitive to over voltage, which could fault the unit and potentially cause damage.
Going over amerage, while it wont damage the equipment, will drastically limit your wattage input. Yes, over voltage will throw and error and shut things down. Going over amperage can cut your input easily by 25% if not more because it will throttle things back to the appropriate amperage.
Going over amp should not reduce your wattage, in fact, it is often a tactic applied to get better charge rates in less than perfect conditions (not high noon on a perfectly sunny and cold day). I suppose you won’t get the sum of the name plate wattage from your panels, but in practical terms, going over amp by say 30% is totally OK as most panels only get about 75% on a good day. For 100% rated output, you will need tropical sun with artic temps.
I over amp my system by 50% and enjoy a broad power peak across much of the day.
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Put 2 of those Rich 200 watt panels in series. You’ll have 48.6 volts, which is within specs, and you be able to get 400 watts in through the enhancer.
what about the amps?
Will that work? Can’t remember the max on the enhancer
thanks
The amps are limited by the MPPT controller, so you don’t have to worry about having too many on your panels. Actually, over paneling is specifically having more current available than the max allowed so that there are more amps available to charge during less-than-ideal solar conditions. As long as you can get as close as possible to the max input voltage without going over you will be good.
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Thanks again for your valuable input.
Say, I was just researching more information.
I am grounding my solar array with a ground rod, deep into the ground & tying it with a heavy copper ground wire.
Then the wires of course head to the Bluetti Max.
Do I need any kind of surge protection between my panels & the max?
Just ran across some info on that & had not heard about it.
thanks
Jeff
My arrays (I have the AC300, so I’m making 2 solar arrays) will also be grounded, but I don’t currently have anything planned for surge protection and haven’t really looked into that. I will have a 20-amp circuit breaker on each and those will function as disconnect switches as well. The picture shows what I ordered for that. The breakers are specifically for DC circuits, and that is important to handle arcing when interrupting DC current.
Something like this would be compatible with the DIN mounted system (but would have to get a larger box than what I ordered).
on your breaker & box listed above. Are you hooking both arrays into this breaker (4 wires) or are you having 2 of these breakers - one for each array?
I will be having 2 wires coming in from my 1000 watt array & 2 wires coming in from my 400 watt array.
Yes, I suppose that was not clear. I have 2 of the breakers, each of the arrays will have its own, and from there each will go to it’s own MPPT controller in the AC300.
I am guessing, the surge protector would go in line before breaker. I know in regular grid hook ups, the surge protector goes in the panel, tied to the main breaker.
I like the idea of your breaker & the box, will look into that more. I was thinking that maybe I would just mount the box & breaker in the house, right before they go into the MAX inputs. But the surge protector could be installed out by the panels or in the house. Am not sure which would be better. Possibly no difference at all. I guess at this stage, the main purpose would be to protect the MAX.
got it, I was figuring that, but wanted to make sure.
thanks
jeff
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Say I have a Bluetti Maxoak EB150.
Max watt input is 500 watts
The max voltage input is 60V & the max amp input is 10a on the Bluetti.
I am looking at two solar panels that are 210 watts each.
Each panel is 19.83 volts and 12.48 amps.
I will be wiring them in series, so the voltage will be 39.66 which is way under the maximum of 60 volts.
But even though the amps won’t change, the amps will be 12.48
Can I hook these two panels to the EB150?
thanks
jeff
Yes, you can. The EB150 will limit the input to its rated 10A, but can take in the two panels in series. You will probably get about 390 watts maximum input power.