Sparks wrote:
I have got a generator (Generac BSP7500LE) connected to my house (Via a
proper transfer switch!)

When running from this generator, there is a very noticeable flicker on the
lights all the time.

I have a tester, and it tells me the voltage is 230v and 49.8Hz when the
generator is loaded at about 10A - what am I getting this flickering on the
lights, and can I do anything to stop it!?

I have three UPS' on various computer equipment, and they seem happy with
the generator's supply.

Sparks...


I'd be interested to hear the true answer. Its not wave shape, a
filament lightbulb can run off any wave shape, and with the power level
varying at 100Hz (which is what you get on a 50Hz supply) the filament
will smooth it all out no problem.

The lighting flicker you see on gennies sometimes is at much lower freq
than 50Hz, so the genny's output must be in some way modulated at a
lower frequency. I dont know what the cause is, but the only likely
candidate I can think of is the control circuitry, the regulator, where
one is fitted.

If youre determined to get rid of the problem, there are 2 solutions,
excluding genny replacement.

1. changing to CFLs will help, as their output varies much less with v.
Traditional fluorescents ditto.

2. Putting big reservoir caps on the CFLs will wipe out the problem
completely. Full wave rectify the power to the bulb socket and add your
big cap there. It will be compatible with all CFL and filament bulbs
then. Note youre not allowed to do with with screw in holders, since it
leaves both connections live.


I get the feeling I have explained not very well here...


NT