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Permanent master slave GTIL2
#31
I believe prolonging the batteries life the way I suggested with master and slave is considering the environment and economically saving me money not having to replace batteries as soon as well as the learning experience I’m getting from it all

I guess basically I’m saying why use batteries for all of the loads (lowering life expectancy of batteries) when it’s more efficient to let straight solar supply those loads directly..yes I’m saying to use bats on second inverter but like I said if master and slave is created then bats aren’t used as often.

What u are saying about adding the extra resistor is hard for me to grasp with my limited electrical experience...I think your saying the second inverter will respond slower with extra resistor but will still produce the same power as it would if the second resistor wasn’t added...so like if my inverters are covering 3200w max worth of loads that they still would with extra resistor... are u also saying that when there’s clouds that it (extra resistor)wouldn’t change the amount the total the inverters produce at any time, that it would just slow the response from the second inverter?
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#32
Going from solar directly to the inverter can have negative effects. Lets say a large cloud covers the panels. This lasts for about 5 minutes. The inverter will switch from solar to mains (or more like, use more mains), and when the solar becomes available, it won't immediately switch over to it. It waits for it to be stable. This could 1 minutes, or 5 minutes. What happens if there are several clouds that pass that push the solar output down constantly? Add up all that down time and you could end up with several kWh or even 10's of kWh by the end of the month.

Going from Solar -> Battery -> Inverter doesn't mean the inverter is "always" pulling from the batteries. Once the batteries are topped off, current flows directly from solar to inverter. Then when there's an issue as above, the batteries will take the hit and be a buffer. Once the solar is restored the batteries are restored to full power. This is not a full charge cycle.

When we refer to battery cycles, we are basically saying from full to empty and then back to full. So if your batteries never drop below 90% SoC, then you don't have full cycles. You could do this 10% top off 10 times before a "full cycle" could be possibly reached.

Now, I am not saying what you are doing is wrong or bad practice. There are grid ties that are specifically designed to run "only" on solar/wind/hydro input and no batteries at all. So it is possible and is a practice in certain applications/conditions.

Using the battery for 10% or so is not going to stress the battery very much, if at all. Unless for that 10% you are pulling high amp loads/cell.
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#33
The inverters I have seem to instantly ramp up power as soon as cloud let’s even a sliver of sun come out...
The way I understand the process for having batteries is that the batteries are always used when inverters produce power..a charge controller is just that, a charger that controls the charge going to the bats. Except from the aux-load ports the power coming from cc is not a power supply but rather it is a charger...the charge coming from the cc tries to just keep the batteries full as the inverter draws its power only from the batteries...
Yeah the batteries aren’t getting used hard (full cycle) if they are full charged and inverter isn’t drawing much from them and cc is just keeping the bats topped off but none the less the batteries (not the cc) are still feeding the inverter and the bats will be used harder than that sometimes if they are connected to the first responding inverter-master ..this is why I said above the master using straight solar would prolong the batteries life due to the batteries not being used constantly used everyday all day for loads that coulda been covered by just using straight solar...maybe I’m completely wrong...hope not
For instance if a battery sat on a shelf and just stayed on float charge, no loads or atleast nowhere near as much of a load getting drawn from it daily,,that is like what batteries would do connected to slave inverter due to master(straight pv power) supplying most of the loads (constant loads) then that battery would last a good bit longer(longer overall lifespan) than a battery that was used constantly to supply power to all loads all day everyday
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