<div dir="ltr">John,<div> That run time changes things for sure. 6Ahr / 30 minutes = 12A running current or (12 x 40 = 480 watts) 2/3 hp. Thanks for the info.</div><div>Regards,</div><div>Doug P.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jun 8, 2021 at 1:11 PM John Gauthier via DPRGlist <<a href="mailto:dprglist@lists.dprg.org">dprglist@lists.dprg.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<div>I have a Ryobi RY401015 mower. It has
not one, but two 6 Ahr batteries. Both batteries can be inserted
into the mower, but only one is used at a time (selected by
inserting a "start key" in one of two positions -- it's really
just a shunt). The advertised 70 minute mowing time comes from
depleting one battery, then the other. So one battery only gets
you about 30 minutes mowing time under average conditions. Mowing
time decreases with grass height and use of the self-propelled
feature.<br>
</div>
<div><br>
</div>
<div>John G.<br>
</div>
<div><br>
</div>
<div>On 6/8/2021 9:59 AM, John Swindle via
DPRGlist wrote:<br>
</div>
<blockquote type="cite">
<div style="color:black;font:10pt Arial,Helvetica,sans-serif">One
mower is too dirty to read anything on it such as faceplate. One
is still in its box which says "13 amps". But I don't see a
wattage or VA number. So, I don't know if its 13 reactive amps
that don't draw power, or 13 amps like a space heater. Not going
to tear into the box just yet.
<div><br>
</div>
<div>I've never used a battery-powered mower.<br>
<br>
A Kill-a-Watt would be nice to see what's really happening,
but I've noticed that watt meters from different vendors
display radically different results depending on the load's
reactance. Even Kill-a-watt can be fooled to report no power
being drawn.</div>
<div><br>
</div>
<div>Best to you,</div>
<div>John Swindle</div>
<div><br>
<br>
<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font size="2">-----Original Message-----<br>
From: Doug Paradis <a href="mailto:paradug@gmail.com" target="_blank"><paradug@gmail.com></a><br>
To: John Swindle <a href="mailto:swindle@compuserve.com" target="_blank"><swindle@compuserve.com></a><br>
Cc: <a href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>
<a href="mailto:dprglist@lists.dprg.org" target="_blank"><dprglist@lists.dprg.org></a>; <a href="mailto:jjbrockm@gmail.com" target="_blank">jjbrockm@gmail.com</a>
<a href="mailto:jjbrockm@gmail.com" target="_blank"><jjbrockm@gmail.com></a><br>
Sent: Tue, Jun 8, 2021 9:01 am<br>
Subject: Re: [Dprglist] Ryobi battery packs<br>
<br>
<div id="gmail-m_6392268343540410932yiv3844056441">
<div>
<div dir="ltr">John,
<div> Good to hear from you as always. My
calculation was based on internet reviews of run
time. I may be misunderstanding the battery's
specs. They call it a 40V, 6A battery. I made the
assumption that what they meant was 6 Ahr. If they
mean the output is 40V at 6A that would be 240W
(~1/3 hp), and a capacity of 9Ahr for 1.5 hours of
life versus the 160W (~0.21 hp) I initially
estimated. However they sell the batteries in
terms of 40V/2A, 40V/4A, 40V/6A, so I think my
original assumption that the "A" value is really
Ahr is likely correct. Have you ever owned a
battery power mower? I know the Ryobi mowers use
brushless motors and very thin light weight
cutting blades. Would you share the wattage or
volt/amp values from your mower's faceplate? It
would be interesting to know what values to
expect. </div>
<div><br clear="none">
</div>
<div> You have made me curious, next time I'm in
Home Depot, might look over the electric mowers'
faceplates. It is frustrating how the adverts and
mower websites never really tell you anything.</div>
<div><br clear="none">
</div>
<div>Regards,</div>
<div>Doug P. </div>
</div>
<br clear="none">
<div>
<div id="gmail-m_6392268343540410932yiv3844056441yqt34916">
<div dir="ltr">On
Tue, Jun 8, 2021 at 7:42 AM John Swindle via
DPRGlist <<a rel="nofollow noopener
noreferrer" shape="rect" href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>>
wrote:<br clear="none">
</div>
<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div style="color:black;font:10pt Arial,Helvetica,sans-serif">Is 160w enough to mow?
I think corded electric mowers draw more than
a kilowatt. Never measured it, but labels say
big amps. (I've only ever owned electric
mowers for 40 years. Don't last more than
about 100 running hours, so I've had several.)<br clear="none">
<br clear="none">
<br clear="none">
<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font size="2">-----Original Message-----<br clear="none">
From: Doug Paradis via DPRGlist <<a rel="nofollow noopener noreferrer" shape="rect" href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>><br clear="none">
To: jesse brockmann <<a rel="nofollow
noopener noreferrer" shape="rect" href="mailto:jjbrockm@gmail.com" target="_blank">jjbrockm@gmail.com</a>><br clear="none">
Cc: DPRG <<a rel="nofollow noopener
noreferrer" shape="rect" href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>><br clear="none">
Sent: Tue, Jun 8, 2021 7:29 am<br clear="none">
Subject: Re: [Dprglist] Ryobi battery
packs<br clear="none">
<br clear="none">
</font>
<div id="gmail-m_6392268343540410932yiv3844056441gmail-m_-7104510074944088322yiv2640301341">
<div dir="ltr">Jesse,
<div> Looking at reviews of the
battery it seems a fresh 40 volt 6Ahr
battery put in an electric lawn mower
lasts about 1.5 hrs. This means that
the draw for its intended use is 4A
(i.e., 160W).. </div>
</div>
<br clear="none">
<div>
<div dir="ltr">On Mon, Jun 7, 2021 at
12:40 PM jesse brockmann via DPRGlist
<<a rel="nofollow noopener
noreferrer" shape="rect" href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>>
wrote:<br clear="none">
</div>
<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>What I wonder is what the current
ratings of a Ryobi pack like this
is? Can I draw 10c? 😀😀</div>
<br clear="none">
<div>
<div dir="ltr">On Mon, Jun 7, 2021,
12:33 PM Doug Paradis via DPRGlist
<<a rel="nofollow noopener
noreferrer" shape="rect" href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>>
wrote:<br clear="none">
</div>
<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Murray and Harold,
<div> Thought you might
enjoy this.</div>
<div><a rel="nofollow noopener
noreferrer" shape="rect" href="https://hackaday.com/2021/06/07/ryobi-power-packs-as-ebike-batteries/" target="_blank">https://hackaday.com/2021/06/07/ryobi-power-packs-as-ebike-batteries/</a> <br clear="none">
</div>
<div><br clear="none">
</div>
<div>Regards,</div>
<div>Doug P.</div>
</div>
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