Greetings Hacklesup,haklesup wrote: But that new guy had a good point at the end about not knowing when it would switch over and the possibility of being surprised or disappointed by the glitch.
Why not put the switch on the DC side of the inverter and let the inverter power the load 100% of the time.
You are correct, and that is how commercial UPS
systems operate (AC-DC-AC). The Op is aware
of these systems but appears to have set limitations
on what they are willing to do, and has eliminated
a commercial UPS system from the project.
Bigglez wrote: Typically solar power systems are used to supplement
utility power.
dacflyer wrote:i know this much.
Bigglez wrote:The always on variety operate with AC-DC-AC
configuration, meaning the utility AC is converted
to DC to charge batteries, and reconverted to AC
to power the load. If the utility power is lost the
load is then powered from the battery via the
inverter without missing a beat.
dacflyer wrote:i know how inverters operate, i am not new to this.
Bigglez wrote:Before you put your system on-line I think you
should get your local utility to sign off on the
work.
dacflyer wrote:my system will not be grid tied,,nor does my utility company offer this solution, otherwise i'd have done this already..
Biglez wrote:If it were me I'd take a close look at inverters
designed for UPS, starting with off-grid solar
vendors first.
The OP will likely implement the AC change-overdacflyer wrote:i have looked, all the inverters i have seen only run normally on standby
(commercial power, until there is a failure, then the inverter kicks in,,as i stated, i want my system to run on inverter all the time,,then switch over to commercial power if the batterys should happen to get to low..
relay solution where the relay is controlled by the
battery voltage (dropping back to utility power
when the battery is depleted).
Doesn't sound as if the OP wants to rehash the topic further.
Comments Welcome!
Peter