[RE-wrenches] Magnum and Pumps

Hello Wrenches, We are hoping to use a Magnum PAE 4448 to back up a household that includes a 3/4 HP deep well pump. There is about 120 feet of vertical rise and about 1000 feet of horizontal distance. I have been told that there is a correlation between the locked rotor current of a pump an

Re: [RE-wrenches] Magnum and Pumps

Drake, As a normal CYA, I'll always gently let a customer know that this (or any) particular combination of inverter and load sometimes proves incompatible, just in case the unexpected happens. (We once had a MS4448 that would not reliably start and run a condensi

Re: [RE-wrenches] Magnum and Pumps

If you have a clamp on meter that can capture inrush current (I use a Fluke 337 for this) you can get a good idea of the starting current needed. One problem is that while backing up the house, you will likely have other loads operating when the pump starts which will decrease the available surg

Re: [RE-wrenches] Magnum and Pumps

For what it's worth, I've run a single speed 1.5HP pool pump with a MS4448PAE in a mobile application on a 38.4kWh battery bank (sixteen Rolls S-530's). I have also run a 2.5HP Hayward EcoStar Variable Speed pool pump at full RPM, but that startup current is likely less than you well pump. I'm goi

Re: [RE-wrenches] Magnum and Pumps

Hi Drake, To answer question "does this seem like a good combination" I would reply no. Keep in mind well pumps often kick in concurrently with other large loads, washing machines, dishwashers, etc. I'm sure the MS 4448 PAE will start the pump ok, but forewarn customer of brownouts when

Re: [RE-wrenches] Magnum and Pumps

To further qualify my statements, the inverter will start the pump without issue, but I should echo the warnings by others that if there are other loads present, especially other motor loads that could start ​concurrently, you may experience issues. As long as your customer understands the limitati

Re: [RE-wrenches] Magnum and Pumps

I haven't seen anyone mention the battery bank. If I understand correctly, there's a single string of sealed L16 batteries on this inverter. I have my doubts as to whether or not that bank can provide the high current the inverter needs to start this load.

Re: [RE-wrenches] Magnum and Pumps

Hi Roy, The FullRiver DC400-6 AGM battery can issue 2000 amps for 5 seconds so he should be fine. Larry On Jul 2, 2014, at 12:35 PM, Roy Butler wrote: I haven't seen anyone mention the battery bank. If I understand correctly, there's a single string of sealed L16 batteries on this inverter.

Re: [RE-wrenches] Magnum and Pumps

Sweetthanks for that info, I stand corrected! Roy Butler NABCEP Certified Solar PV Installer® NYSERDA eligible PV & wind installer IREC Certified Master Trainer™ for Small Wind Installer Four Winds Renewable Energy, LLC 8902 Route 46, Arkport, NY 14807 607-324-9747 www.f

Re: [RE-wrenches] Magnum and Pumps

​Even at 9600W, which is above the 5 second surge rating of the inverter,​ we're looking at about 200A on the DC side, which would be a 1-hr rate on an L-16 string. While that is high, it should not be an issue. Even at the 1ms surge of 16,800W, a 48 string of L16's should be able to handle that.

Re: [RE-wrenches] Magnum and Pumps

Sorry, typo - that's a 48V string (one string of 8 batteries). Jason Szumlansk​i Fafco Solar On Wed, Jul 2, 2014 at 3:15 PM, Jason Szumlanski wrote: > ​Even at 9600W, which is above the 5 second surge rating of the inverter,​ > we're looking at about 200A on the DC side, which would be a 1-h

Re: [RE-wrenches] AFCI disturbances. wire nuts

August, can you contact me offline. I would like to discuss the testing you do for proper connections as part of our safety program. Thanks g...@hudsonsolar.com From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of August Goers Sent: We

Re: [RE-wrenches] Magnum and Pumps

What has been everybody’s experience with Full River Batteries? Bob From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Roy Butler Sent: Wednesday, July 02, 2014 3:12 PM To: re-wrenches@lists.re-wrenches.org Subject: Re: [RE-wrenches] Magnum and Pumps Swee

[RE-wrenches] GT with batteries in Calif.

Recently the CPUC ruled that the utilities must continue to allow interconnection of net metered systems with batteries, but some stipulations were added. One is that systems with storage over "10 KW" (which is not a storage metric) require an additional meter, ostensibly so that the utility can

Re: [RE-wrenches] GT with batteries in Calif.

I am not familiar with PGE's time of use rates for residential. I have to assume that they do have TOU built into their metering. Buying at any time is predicated by the load of the facility, including battery load, so this is probably their concern. Given the costs of batteries it seems uneconomca

Re: [RE-wrenches] GT with batteries in Calif.

" In any case, a 10 kW battery system, will probably exceed most grid connected battery systems, and the whole issue is moot. " shouldnt battery capacity be in kWh? todd On Wednesday, July 2, 2014 5:00pm, "Christopher Warfel" said: I am not familiar with PGE's time of use rates fo

Re: [RE-wrenches] GT with batteries in Calif.

RE-Wrenches We have been doing battery back up systems for years and some times the utility goes sideways, we recently did a battery back up with 2 OutBack Radians, 950 Ah Nickle iron batteries usable is estimated at 27.36 kW, here the utility gave us a 20 amp 240 volt cap for back feeding so we s

Re: [RE-wrenches] GT with batteries in Calif.

I think so. Bruce's post indicated that 10kW seemed incorrect. So assuming a 10 kW inverter exporting for the onpeak period over an unknown assumed number of days assuming no recharge from the utility?  I know this has a lot of different ways of being looked at, which is why the atakeholders need t

Re: [RE-wrenches] GT with batteries in Calif.

I think so. Bruce's post indicated that 10kW seemed incorrect. So assuming a 10 kW inverter exporting for the onpeak period over an unknown assumed number of days assuming no recharge from the utility?  I know this has a lot of different ways of being looked at, which is why the atakeholders need t

Re: [RE-wrenches] GT with batteries in Calif.

I emailed Brad Heavner, the policy director at CALSEIA, today and got this response in part (I omitted his expression of exasperation): " . . . PG&E’s storage interconnection manager, Bennett Chabot, was on a panel with me two weeks ago and he assured people that PG&E staff should be up to spee

Re: [RE-wrenches] Magnum and Pumps

Bob, Very good performance. Able to take a high charge rate and likes higher voltages than most other VRLA's (up to 7.5v for 6v). Only negatives I see are: not md in USA and very expensive. Dave Palumbo -- Sent from myMail app for Android Wednesday, 02 July 2014, 11:58PM +02:00 from "RE Ellison"

[RE-wrenches] 208 volt off-grid well pump

Friends: About two months ago I inquired of this forum about complications that might result from running a residence on a 208 volt 3 phase system. One respondent indicated that motors might be affected. Sure enough the owner is having problems with the well pump. It is tripping circuit brea