BB. wrote: »
Almost) Anything can be done--But is it worth it...
I am available for custom hardware/firmware development
BB. wrote: »
There appear to be GT Inverters that you can attach to a DC Battery bank... But I would suggest we discuss your power needs (type of loads, size of loads, etc.).
Pure GT Inverters don't usually have much of an advantage in Off grid / Hybrid -- Technically, you can connect a GT inverter (solar panels->GT inverter) to Off Grid inverter--They will share powering the loads and it is even possible to drive power "backwards" through the off grid inverter and recharge the battery banks.
To battery power a GT inverter -- Then connect the GT inverter to what? AC utility power? Could run your meter backwards (if meter is capable and utility is OK with this)--But cycling batteries are "expensive" and the system is "lossy" -- It typically cost you more in battery costs and losses than you would get paid for by the utility.
Anyway--What is the problem you want to "fix"? Don't try to fit a product into a solution that may not be the correct one. (Almost) Anything can be done--But is it worth it...
andersondiaz wrote: »
what if I connect a battery bank to my grid tie inverter Instead of solar panels?
Your GT inverter will try to extract 5kw from your batteries. Generally, GT inverters want to see 300- 500VDC input, which is rare for batteries. What are the specs for your GT inverter, or even it's model # ?
The boost method seem like a complicated way to tackle a simple problem, which may or may not work.Having an auto transfer switch controlled by a timer would allow AC loads to be switched between different sources during certain hours, this is something I do to make use of an otherwise under utilized second off grid system, In my case the main inverter is programed to disable, or block invert, overnight 10 pm to 9 am. Using the grid as the primary source and inverter output as backup source, a timer could be used to drive a suitable contactor which effectively turns off the grid input causing the transfer to switch to battery powered inverter. As soon as the contactor restores grid input the transfer switches back to grid.The loads needed would need to be on the essential sub panel, this is the transfer switch I used https://m.aliexpress.com/item/32868401442.html?pid=808_0000_0101&spm=a2g0n.search-amp.list.32868401442&aff_trace_key=1f5a158981114b37ab6b64f7fe2fc8e6-1564382013135-00741-KnSGCh6&aff_platform=msite&m_page_id=4097amp-ZXkLFFJjLTwwvWd9Q8WQJQ1567581006295Make sure the one used is in compliance with local requirements.
A number of post keeping on indicating GT needs over 200V. The Solis 4G can start on 60V. I would think the boost converter with current limit should work. It seems like the whole system is not understood well. Batteries can be charge with PV from the GT during the day and with spare capacity this can be used to input in the place of solar. One would then perhaps need a transfer switch to disconnect the PV and connect the boost converter output.
The GTIL2 allows the extra power from pv not used by loads to be stored in the battery
2.1 Kw Suntech 175 mono, Classic 200, Trace SW 4024 ( 15 years old but brand new out of sealed factory box Jan. 2015), Bogart Tri-metric, 700 ah @24 volt AGM battery bank. Plenty of Baja Sea of Cortez sunshine.