[RE-wrenches] On demand WH

[Ray Walters]

If its a Rinai, I measured one once that was 30 watts AC standby, and 
jumped a bit higher when firing.  It also needed pure sine.
The customer swapped it for a regular hot water tank.
Some Bosches and old Palomas, etc. had either a piezo ignition or pilot, 
but took no power.
I'm working on a system with one now that needs 12vdc at about 5 watts.

R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760

On 9/28/2013 9:19 PM, frenergy wrote:
> Off-grid Wrenches,
>         I'm working on a load sheet and am having a hard time finding 
> standby and while firing electrical usage for a propane-fired on 
> demand water heater.  Do they some/all have standing pilots, glow 
> bars, something else?  I'm guessing the standby power needs are very 
> low but we all know how even 10-15 watts adds up over 24 hrs when 
> you're off-grid.
>         If any body has some actual numbers rather than just pdf.specs 
> (though manus specs might help some), I would be most grateful.  
> Thanks in advance.
> Bill
> Feather River Solar Electric
>
>
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