most efficient way to light, given a 48vdc pv system? - Page 9

 



Aha.  It seems that the range noted on the spec sheet does not refer to the
maximum programmable range, which is well documented elsewhere, and also
confirmed by owners of units from the different companies.

To get back to your previous statement:

"... and may be as low as 60% at the max continuous rating."


Which inverter has an efficiency of 60% at max continuous rating?





-- ron  (off the grid in Downeast Maine)

 



Ron Rosenfeld wrote:

So, all that shows is that the companys involved need to up their data
sheets. The data sheets in question clearly state the operating range
for input.

Been trying to find a documented example for you. Unfortunately, while
there are a number of inverters which fall into this category I have not
found any that provide comprehensive data sheets. This in itself should
be enough to prevent any sound thinker to be wary of the product.

But then. If you read these groups it would seem that such machines are
preferred.

OTOH citing the performance of good quality equipment in a manner that
suggests that such performance is typical of all products is not helpful.

 



I would agree with that statement.  The OP's inverter is an SW4048 which
does have acceptable efficiencies, though.


-- ron  (off the grid in Downeast Maine)

 


It might not be with ANY flavor of electricity.  How about modern
mantle fuel lamps?  Work fine with kerosene.  Mount them outside the
windows in some sort of frame, so that they burn outside air, and don't
heat up the interior. Fabricate reflectors out of aluminum foil glued
onto cardboard. Make sure you cut light off from going UP, so that you
don't pollute the observation-space of your amateur-astronomer
neighbors.... Light travels a LONG way.

USe the waste heat to bake or slow-cook.

Save the electricity for doing electrical things.

 

Use 24V dc, becouse in truck shops you can buy every household device TV,
fridge, coffee maker, etc for 24 DC.
You can use an converter 24 to 110 or 230V for the special items that is not
for sale in a truck shop. like PC etc.

The higer the voltage, the lower the current and therefore the lesser the
loss of power in transport.
Lower current reduces also the risk of fire expecily when bad contacts in
the circuits so as old and/or dirty switches.

Lights on low voltage, uses thick glowtreads, so these are more efficient
than high voltage bulbs projector lights in the old days used always low
voltages for this reason. This is only for ordinary glow bulbs.
Fluoressent lights ar more efficient when the frequenty is high.

sucses wiht your home.

--


Groeten,  Dré  Jansen

djansen.2@hccnet.nl