Looking for ideas on how to incorporate a generator in a large solar system.
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Im not really concerned about roi. I have budgeted 50k for this project and 30k of that went to the grid tie system.Comment
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Now if you want to couple your system with a bimodal inverter like those from Outback and a 48V battery bank it will work fine. Though I think you need to consider a SMALLER backup system of just critical loads. If you want to run your welder off grid then start up the generator.
This is true but now we are substantially increasing amperage loads and wire size both are costly in large solar systems. Also I want something that is easily reversed and can be reconnected to the grid because not many people will want to deal with a complex system.
There is NO charge controller with a solarEdge system. The optimizers are directly attached to the PV modules and connected in series to the inverter. The inverter will not work without the optimizers.
It seems like you are trying to remove the optimizers,
and connected the PV modules in series to charge controllers (rapid shutdown code violation ),
the charge controllers to a bank of 400V batteries,
and the batteries to the PV input on the inverter.
None of this will work.
Do you even have a charge controller that can charge a 400V battery?
That would be nice if the grid was reliable. I live in a rural area not in the city. If power outages were a once and a while thing I would do like the rest of the mainstream solar systems.
In your opinion what would be a more plausible off grid solution given the energy requirements I listed in the original post?
But more so the entire plan will not work.OutBack FP1 w/ CS6P-250P http://bit.ly/1Sg5VNHComment
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The cheapest and most reliable way to get the lower cost energy is with a grid tie system.
The reliable power for your huge loads is best done with a generator.OutBack FP1 w/ CS6P-250P http://bit.ly/1Sg5VNHComment
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It looks like a grid tie system ac coupled battery backup is the best option.
Why is it not feasible to run the whole house off of an ac coupled battery backup? Not the whole property just the house.
If I use an ATS to power the main panel with battery backup would I be able to use an ATS between the solar edge inverter and generator to charge the batteries and run the house if there isn't enough solar production? There are times when the grid is off for several days due to poor weather conditions.
How much of a dc load is required to maintain the battery bank.Comment
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Fair enough.
It looks like a grid tie system ac coupled battery backup is the best option.
Why is it not feasible to run the whole house off of an ac coupled battery backup? Not the whole property just the house.
If I use an ATS to power the main panel with battery backup would I be able to use an ATS between the solar edge inverter and generator to charge the batteries and run the house if there isn't enough solar production? There are times when the grid is off for several days due to poor weather conditions.
How much of a dc load is required to maintain the battery bank.
most bimodal inverters have multiple AC connections so that one is dedicated to the inverter
i am not sure what you mean by a DC load to maintain the battery.
There is generally no ned for any load on many backup systems. They sit waiting for an outage.OutBack FP1 w/ CS6P-250P http://bit.ly/1Sg5VNHComment
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From what I read online in ac coupling there is no way for the inverter to balance the battery packs and there was a need to have a dc consumer like a water heater to balance. I was going to use bmc to balance individual modules and use charge controllers to balance pack voltage. But I suppose that the bmc's would regulate the pack voltage by regulating modules.Comment
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You are getting good advice here, stuff on this scale is not plug and play. The Wright
brothers became good engineers, developing their own launch system, gas engine,
and a high efficiency propellor.
The usual start point on these projects is compile just exactly how/where your energy
is being consumed. Getting rid of the obvious waste would be next. I am wondering
if air conditioning is much of it? The newest AC units can cut energy use to less than
half (as is happening here), and there are some units designed to operate DIRECTLY
from solar panels (grid backup). They will not do much under clouds, but that is not
when they are needed.
If the housekeeping stuff is under control, run the generator for welding or the well,
avoid all the issues of batteries. good luck, Bruce RoeComment
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From what I read online in ac coupling there is no way for the inverter to balance the battery packs and there was a need to have a dc consumer like a water heater to balance. I was going to use bmc to balance individual modules and use charge controllers to balance pack voltage. But I suppose that the bmc's would regulate the pack voltage by regulating modules.
there is no need for a dump load with a well configured AC coupled system as the bimodal inverter can regulate fully the grid tie inverter.
as for battery management, well that is on you 100% if you are building a custom battery bank.
Charge controllers do not balance you battery bank, the charge only.
also in an AC coupled system there are no charge controllers, they are only used in DC coupled systems.Last edited by ButchDeal; 10-25-2019, 11:54 PM.OutBack FP1 w/ CS6P-250P http://bit.ly/1Sg5VNHComment
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You seem to be mixing dump loads like a water heater and battery management.
there is no need for a dump load with a well configured AC coupled system as the bimodal inverter can regulate fully the grid tie inverter.
as for battery management, well that is on you 100% if you are building a custom battery bank.
Charge controllers do not balance you battery bank, the charge only.
also in an AC coupled system there are no charge controllers, they are only used in DC coupled systems.
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