If you need a 20ah battery try these: http://www.portablepower.com/12_volt_20_50/EnerSys_DataSafe_NPX-80FR They are $9 cheaper than digikeys eb20 12 price....
18158
Christopher Zach
cz_unit
May 1, 2012 2:11 am
... Or... lithium.... I'm picking up a CleanPower BMS for my Robomower; since I plan to scale up this solution over the summer I wanted to try a...
18159
bkelley9401
May 1, 2012 2:43 pm
Lithium cost too much with no warranty on life. The only drop-in for the robomower cost $600 for 19.2ah. These would be an exact replacement no wiring change. ...
18160
Chris Zach
cz_unit
May 1, 2012 3:31 pm
... Oh for crying in the toast; I could have just BOUGHT a drop in solution? DRAT! So far I am in $240 for the cells, another $140 for the BMS, and probably...
18161
Lee Hart
leealanhart
May 1, 2012 6:46 pm
... People like Valence will sell you a drop-in replacement for about $600. It includes a built-in BMS, and has a good warranty. ... Most consumer products...
18162
Danny Miller
oznog2002
May 1, 2012 6:52 pm
Ironically, I'm pretty darn sure those batteries would NOT be a "safe" option. There's no proper charge controller on there that I can see, so they're...
18163
Danny Miller
oznog2002
May 1, 2012 7:05 pm
Well, you're an engineer too Lee. You tell me. If you have say a 3A charge current, an internal "BMS", how's that gonna work? You shunt 3A at 3.65v, that's...
18164
Lee Hart
leealanhart
May 1, 2012 8:17 pm
... I'm an EE, and design battery chargers and management systems professionally. One of my clients was building a replacement lithium battery, intended for...
18165
Dan Barclay
Dan@...
May 1, 2012 8:26 pm
Warnings also say: Do not let battery come in contact with water. Might be a problem in the rain? It's hard to know what they define as "contact". Most of us...
18166
Danny Miller
oznog2002
May 1, 2012 8:32 pm
The A123 20AH pouch cells are a far better deal. Then you CAN put a proper BMS on it. But some hacker fu knowledge is required. Danny...
18167
Lee Hart
leealanhart
May 1, 2012 9:03 pm
... You're right. The cheapest (and thus most popular) BMS is a simple shunt regulator that bypasses excess charging current, and burns it up as heat. You...
18168
Danny Miller
oznog2002
May 1, 2012 9:54 pm
Well I think the "strategy"; they're using is assuming that there will only be a trivial imbalance in the cells, and the charger will be tapering off because...
18169
Lee Hart
leealanhart
May 1, 2012 10:44 pm
... Exactly right. They assume all cells are good, new, and well matched. But what you'll find in an old laptop pack is that as the pack aged, one or more...
18170
lucasaltic
May 3, 2012 12:39 am
Hey all. I had been waiting to post an update to my solar-charged RL-1000 project until I had something worthwhile to report, however with my luck in actually...
18171
snej123
May 3, 2012 2:13 pm
Hello, sorry, but could someone send me the service manual for the RL1000 mower via e-mail? Thank you. jens...
If you bolted those solar panels to my rental property I would be the owner of those solar panels. And I could have my over paid nephew despose of them and...
18174
Lee Hart
leealanhart
May 3, 2012 7:07 pm
... I think he's right. Some landlords can be a real jerk about renter "improvements". Ask first. He might surprise you, and be interested in the idea. It can ...
18175
Danny Miller
oznog2002
May 3, 2012 10:20 pm
Oh I didn't read that part. Yeah attaching to a roof is quite dangerous. I'm assuming this is a common asphalt shingle roof- it's required to screw into roof...
18176
Lee Hart
leealanhart
May 3, 2012 11:00 pm
... I wouldn't go that far. I was a TV repairman and put antennas on roofs for *decades*. We never had a problem with leaks unless we did something careless. ...
18177
Danny Miller
oznog2002
May 3, 2012 11:19 pm
Even professional installation is risky. I've seen expensive professional installation which looked like it was performed with trained monkeys without the...
18178
The CZ Unit
cz_unit
May 4, 2012 3:12 am
Just a quick note: If your account is compromised and sending spam to the list, I'll toss you off the list. Resub when you get it fixed. On the Lithium front...
18179
The CZ Unit
cz_unit
May 4, 2012 3:16 am
... Indeed. I had professionals from a reputable company install UNi-rack panels on my roof 7 years ago. Last fall the bathroom ceiling was leaking, roof...
18180
lucasaltic
May 4, 2012 11:51 am
Thanks guys. These were my initial instincts but when I originally posted this project here a few people said it was doable. I don't know much about roofing...
18181
Fred Bret-Mounet
fbret
May 4, 2012 6:43 pm
Folks, here is feedback I got from a battery seller. Anybody has had experience whit the following in your favorite mower? Panasonic, 2 models: LC-RD1217P @...
18182
Lee Hart
leealanhart
May 5, 2012 4:56 am
... I don't have any direct experience with these particular model numbers. That said... I have had very good results with Enersys Genesis batteries; very high...
18183
Danny Miller
oznog2002
May 5, 2012 5:23 am
EB20-12 seems to be the only battery really proven to consistently work well in this duty. Digikey's up to $66.40 on them though, and there's no cheap...
18184
Daryl Reece
daryl_reece
May 5, 2012 1:43 pm
I just bought (4) EB20-12 from Digikey in April. The total with shipping was $305.65. -Daryl [Non-text portions of this message have been removed]...
18185
Barry
barryleger
May 6, 2012 3:35 am
I've got Panasonic LC-RD1217P in my RL1000 right now. They are just starting their second full year of service (they have been in the mower for 2.5 years)....
18186
Barry
barryleger
May 6, 2012 3:35 am
I've owned an RL1000 since 2007. It has worked great for me all that time. Normally in the spring, it's not unusual to have a "cut wire" signal after setting...
