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I was wondering, I've seen it done before, and didn't know if it would work on the GS inverter. I've seenw here folks take a grid tie inverter, 120v and even a 240v and attached it to the same output as the inverter, and then have the grid tie actually charge the battery while powering everythign else. Has this been tried on the gS inverter? I have several grid ties, but not tried it, and was checking to see if it can be done.
GS inverters have the theoretical ability to handle this sort of system setup. (It's a bit more challenging on the A.1/B boards due to the AC power monitoring limitations.) I've written code specifically for a grid-tied charge setup (where the inverter automatically does a frequency shift to shut the grid-ties down when the batteries are full), but as of yet, I'm not aware of any customers using/testing this function. Neither Sean nor I have grid-tied inverters, which makes it rather difficult to test.
I have a 500 watt 120v grid tie I can put on a gs, since I don't use no more then 300 watt, I can give it a shot and see what happesn disabling the solar charger. I guess the only way I know if its chargering is if the battery level goes up or will it show that its getting charge on the chargeing status?. I'll run a test tomorrow,.
I have a 500 watt 120v grid tie I can put on a gs, since I don't use no more then 300 watt, I can give it a shot and see what happesn disabling the solar charger. I guess the only way I know if its chargering is if the battery level goes up or will it show that its getting charge on the chargeing status?. I'll run a test tomorrow,.
Keep a close eye on the battery voltage; likely, if the loads on the GS inverter are more than the grid-tie inverter, you'll be fine.
We probably should think about a Rev. C upgrade for your inverters if you want to run a grid-tie system, due to the improved power monitoring systems...but that's going to require a sighted individual who is electrically knowledgeable--as the C boards have significantly different terminal locations and wiring requirements from the A.1 boards your inverters have.
So you saying not try it if the load isn't higher then the grid tie? cause the most my gs are running on idle is 300 watts at any given time sometimes less. if I'm running the whole house one basicly runs all 120v and the other runs the kitchen and utility room, I think from what I'm seeing is that the slave runs one side of the house and the other runs the other side. The one that will get used the hardest will be the slave, and luckly I have the lythuim batts running on it. I'm in the proccess of getting hob and going to be moveing, keeping the house, and will buy more lythuim batts and keep the house running directly off of solar soon while I'm at my new place. I might end up switching to 48v down the road as well once I get my new hob and get a 12k gs inverter.
I'm only getting 2.5k on the master with the deep cycle right now and I'm useing every bit of it every day with running my ice maker dish washer and frig. more if I'm washing dishes and doing that during the day to use any power up before the bank fully recharges.
I did forget for a moment that you're running 120v split-sync. This does run a bit of a challenge with a grid-tie inverter...as the one thing the slave CAN'T do is run a frequency shift shutdown on the grid-tie--as to do so would require losing sync with the master.
As long as the AC loads on the GS inverter exceed the grid-tie inverter's output, you won't run into any issues. (If the grid-tie's output exceeds the inverter loads, it will start back-charging the battery--but the slave can't frequency shift to shut the grid-tie off. If this happens, it could overcharge your battery.)