The Midnite Classic can go higher to 72v stock, and they have models
that can work with 120 vdc batteries.
Ray
On 3/15/2022 12:19 PM, larrycrutcher wrote:
Hi William,
A charge controller may not be needed if you are running the pump
direct. By designing the PV array so that the Isc is higher than the
maximum load demands, and the Voc is less than the maximum operating
voltage, you can run PV direct without a controller. Use a high
voltage relay (like Gigavac) for switching from the float or pressure
switch.
Charging a high voltage chemical battery direct from PV power is
conceivable but much harder. If you can’t find a controller, I would
opt to use the pumped water as the battery…pump it high, use gravity.
Larry Crutcher
Starlight Solar Power Systems
On Mar 15, 2022, at 9:10 AM, William Miller <will...@millersolar.com>
wrote:
Windy:
Thanks for the info. I have been in contact with Sun Pumps. They can
sell me a pump that will work off of a high voltage battery bank
(greater than 90 VDC and likely much higher). However they cannot
provide or recommend a charge controller to output PV charge at the
higher voltage. Do you or any wrench know of a high voltage charge
controller on the market?
Thanks in advance.
William
On Thu, Mar 10, 2022 at 8:29 AM Windy Dankoff <windydank...@mac.com>
wrote:
Dear William,
SunPumps has a new helical rotor submersible series (positive
displacement) that is typically much more efficient for high lift
compared to a normal multi-stage centrifugal sub (you'll have to
compare the specs).
https://www.sunpumps.com/Products/HR%2010-525%20AC%20DC
I have no inside-knowledge of this item, but it's based on good
technology similar to Lorentz and Grundfos and SunPumps is on the
same level as a world leader.
With any DC pump, you need to be sure it's compatible with battery
power if you need 24/7.
I hope you'll let us know how it goes.
Windy
*From:*William Miller <will...@millersolar.com>
*Subject:**[RE-wrenches] 24/7 wATER pUMPING*
*Date:*March 8, 2022 at 7:53:37 AM MST
*To:*RE-wrenches <re-wrenches@lists.re-wrenches.org>
*Reply-To:*<will...@millersolar.com>
Friends:
I have a client that wishes to pump water at about 10 GPM from
spring through autumn equinoxes. Lift is 300 feet. (This is
the project that will not siphon beyond 33 feet.)
I can design a solar/battery/inverter system for this purpose but
I am wondering if there is a direct DC option. I am going to
look at the Grundfos SQ-Flex tables to see if this is an option.
Does anyone out there have any advice on best approach to this
project?
Thanks in advance,
William Miller
Miller Solar
17395 Oak Road, Atascadero, CA 93422
805-438-5600
www.millersolar.com <http://www.millersolar.com/>
CA Lic. 773985
*From:*Jerry Shafer <jerrysgarag...@gmail.com>
*Subject:**Re: [RE-wrenches] 24/7 wATER pUMPING*
*Date:*March 8, 2022 at 8:58:16 AM MST
*To:*William Miller <will...@millersolar.com>, RE-wrenches
<re-wrenches@lists.re-wrenches.org>
William
Here is the deal it will be simplest to go AC for the pump
because of the requirement of high voltage DC yes there are small
er output DC pumps but that is not what you need, first find a AC
pump that can do the required 10 GPM at 300 feet of head then
design a inverter to fit that bill PV to recharge that usage and
then some. look at the first and last day of the desired water
demand and go the shorted day as a production base line. When
looking at pumps grundfus is very efficient in DC and wild AC but
at a cost so look at options output vs input. I have done this
with Grundus and DC direct to a 50K storage tank at the very top
of the property so it can be done with DC so AC just requires
additional nighttime.
Here might be an option large enough storage tank to fill every
night and a pump big enough to drain it every day, this can be
done DC direct, cheaper and less moving parts and the pump can
run on a genny if you have bad weather for days, This is how the
ones I have done work.
Jerry
_______________________________________________
List sponsored by Redwood Alliance
Pay optional member dues here: http://re-wrenches.org
List Address: RE-wrenches@lists.re-wrenches.org
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
There are two list archives for searching. When one doesn't work,
try the other:
https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
http://www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
http://www.members.re-wrenches.org
--
William Miller
Miller Solar.com <http://Solar.com>
895-438-5600
www.millersolar.com <http://www.millersolar.com/>
_______________________________________________
List sponsored by Redwood Alliance
Pay optional member dues here: http://re-wrenches.org
List Address: RE-wrenches@lists.re-wrenches.org
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
There are two list archives for searching. When one doesn't work, try
the other:
https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
http://www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
http://www.members.re-wrenches.org
_______________________________________________
List sponsored by Redwood Alliance
Pay optional member dues here:http://re-wrenches.org
List Address:RE-wrenches@lists.re-wrenches.org
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
There are two list archives for searching. When one doesn't work, try the other:
https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
http://www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
http://www.members.re-wrenches.org
_______________________________________________
List sponsored by Redwood Alliance
Pay optional member dues here: http://re-wrenches.org
List Address: RE-wrenches@lists.re-wrenches.org
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
There are two list archives for searching. When one doesn't work, try the other:
https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
http://www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
http://www.members.re-wrenches.org
