bill von novak ✭✭✭✭
- bill von novak
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I have some extra panels lying around and I connected them to the little GTI I purchased on Ebay. It recognized my home power as a grid and started feeding power into it. Shaving about 200 watts off of my 1000 watt AC load according to the Conext SCP. Can I safely feed 800 watts with a better GTI? Is it really reducing my AC load and allowing my main PV to do it's job and fill the batteries? Looks like it.When my batteries are full, the charge controllers stop. They aren't feeding PV to anything. They are sitting there being wasted until I hit the rebulk voltage. I want to avoid that.
You can do that without a grid tie inverter. When your batteries are fully charged, your power is going from the panels to the inverter. You are still using that power. Whether or not it goes through your main inverter or a grid tie inverter doesn't matter.I have a generator, but I hate using it. It's a Honda eu3000. Somehow I got a lemon and it requires tons of maintenance to keep it running. I even have an eu2000 but it's now to small for what we are drawing.
I believe the SW4024 has a generator support mode; that allows you to use any size of generator.
In_the_dark said:I am trying to learn this subject but feel I could use some advice.
Currently I am in London shopping for rebuilding materials to ship to Dominica. At the time I write only 3.6% of the island is connected to the grid. We expect to be without power for up to two years.
Could anyone suggest a shopping list for a solar panel system capable up providing sufficient power for a fridge, microwave, lighting and power tools.
We are on a latitude of 15 degrees.
Choose battery types. Do you want cheap and short-lived (a few years) or more expensive but lasting 10-20 years? Maybe cheap is the way to go since you don't anticipate this lasting forever. There are lots of options out there now.
Make sure you get a hybrid inverter capable of doing grid tie, so when the power comes back you can still get benefit out of the system.
fazilcv said:We are going to install on-grid zero injection roof top pv system and design is already done by using Helioscope. So my questions is,
If the solar system is not producing the needed power maybe because of rain or cclooudy days etc.. can we take that additional power from main grid?,if yes how then connection should be made or additonal equipment is required for this?
You can do this without a battery as well. SolarEdge has a non-battery grid tie inverter that will support zero export. You use your own solar power. If you don't use it all the extra solar is wasted. If you need more than that it's pulled from the grid.
I'll post some updates as I come across interesting seminars/exhibits.
BB. said:MPPT charge controllers--No, each should have its own array so it can mange Pmp=Vmp*Imp.
. . .
There are a couple Positive Ground PWM controllers out there--I am not sure how to share a single array with them (don't know how they are designed internally). So I cannot say for those types.
If you are using the same charge controllers for both that MIGHT work; the big problem then will be the MPPT algorithms fighting as you mention above.