Gary Fuller's posts

I could draw a single line and post it, bu t I believe I can explain it quicker.

ORIGINAL:
One sub-panel being fed through the one UPS system. UPS is fed by the utility and the battery rack's inverter, the UPS transfers the feed into the panel to whatever power source is available.

ADDED:
One manual start Genset with one manual transfer switch. The UPS now feeds wither the utiltiy power or the battery rack's inverter to the bypass switch. Throwing the manual transfer switch switches the feed into the panel from UPS (battery or grid) to the generator input.

ADDED LATER:
Photovoltaic feeding right into the sub panel.

Let me know, if you would like a single line and some photographs I will put a page together and post it to the internet. My concern is if the photovoltaic system sees power, it thinks the grid is up and feeds into the system. If it is not grid power, it is battery rack inverter OR the genset (manual bypass iunsures this). If it is not the grid, what may happen? Does this sound ok? Will the solar system cause any problems feeding full KW into the smaller generator or the smaller rack?

I posted this in the installer forum but noticed many more participating in here. Please forgive the duplicity.

I have a client for whom we just replaced 30 batteries feeding a UPS system. The UPS takes power from the utility or an inverter for the batteries. The feed into the inverter from the UPS bateries is two legs of DC @ 12 x 15, or roughly 180 VDC per leg, output is 230 VAC into the UPS.

He also has an 8kw manual start, stand-by generator that he may plug into the panel. He uses a manually operated transfer switch, disconnecting the utility feed and engaging the  genset.

Recently, he had someone else install a solar system feeding into the same panel. Therefore, the inverter will almost always be in parallel with another source of power, but only the utility can accommodate a constant full power back-feed from the inverter.

I do not think a standard grid-tie inverter is the right way to go. What inverter will automatically scale back its output so as not to overdrive the genset  or the back up batteries on the UPS(like the demand is only 3 kw, it is the middle of a sunny afternoon, and both the solar and genset and UPS are online)?

I have a client for whom we just replaced 30 batteries feeding a UPS system. The UPS takes power from the utility or an inverter for the batteries. The feed into the inverter from the UPS bateries is two legs of DC @ 12 x 15, or roughly 180 VDC per leg, output is 230 VAC into the UPS.

He also has an 8kw manual start, stand-by generator that he may plug into the panel. He uses a manually operated transfer switch, disconnecting the utility feed and engaging the  genset.

Recently, he had someone else install a solar system feeding into the same panel. Therefore, the inverter will almost always be in parallel with another source of power, but only the utility can accommodate a constant full power back-feed from the inverter.

I do not think a standard grid-tie inverter is the right way to go. What inverter will automatically scale back its output so as not to overdrive the genset  or the back up batteries on the UPS(like the demand is only 3 kw, it is the middle of a sunny afternoon, and both the solar and genset and UPS are online)?