Hi The load issue with Diesels is most stand by diesels are started once per month, and run for a period of time, this is at light load. If the Diesel is not worked hard the rings lose there seal ie compression falls and makes them hard to start. Therefore they are load tested on various schedules for engine and other operating conditions, Darryl
--- On Fri, 6/18/10, Mick Abraham <[email protected]> wrote: From: Mick Abraham <[email protected]> Subject: Re: [RE-wrenches] Additional Battery Charger To: "RE-wrenches" <[email protected]> Date: Friday, June 18, 2010, 7:35 AM I definitely like to require the generator to work hard for every hour in which we must listen to it, feed fuel to it, etc. (This presupposes that we have plenty of battery to accept genset wattage <minus altitude derations> <minus charger inefficiency> <minus a bit of breathing room for the engine>) Also: that 50 hour oil change interval...or 100 hours...or whatever...comes around right regular and we want to wring out lots of watt-hours between service dates. ****************************** There's an old...dare I say it...wive's tale about diesel machines actually suffering shorter lifetimes if they are not heavily loaded. I think this belief goes way back to WWII days and may not be valid with current engine designs. It's something about the load torque requirement helping to maintain engine compression. Opinions from the List on this theory would be welcomed. ******************************* Once you have plenty of charger load to throw on the generator, tweak up on the "AC input amps" setting in the Outback Mate or Magnum Remote while listening to the engine. (The battery must not be highly charged during this tweak or else the chargers will be in throttle back mode.) Dial up on the AC input amps setting while also causing major household loads (such as the water pump, washing machine, etc.) to kick in & out. Up, up, up until the generator engine can be heard to struggle beneath the load, then dial back down on the AC input amps until the gennie sounds happy with its work again. Jolliness, Mick Abraham, Proprietor www.abrahamsolar.com Voice: 970-731-4675 On Thu, Jun 17, 2010 at 11:13 PM, benn kilburn <[email protected]> wrote: mick, bob, funny you should mention using a magnum as the 'additional charger', the system owner just happens to still have a MS4448 on the wall from his original system (we had upgraded his system to a FW1000 with 2 x VFX3648's back in the fall). i hadn't even thought of using the magnum only as a charger, and the price is right! thanks for the suggestion, i'll look into this as a possibility. Any other comments on my question about generator efficiency when fully loaded vs say half loaded? cheers benn DayStar Renewable Energy Inc. [email protected] 780-906-7807 HAVE A SUNNY DAY From: [email protected] To: [email protected] Date: Thu, 17 Jun 2010 21:19:03 -0400 Subject: Re: [RE-wrenches] Additional Battery Charger Look into the Magnum inverters as 2nd chargers, very good chargers with generators. I have done this many times, in the case of failure of the other inverters for some reason, run wires and be back up and running. I think the 4448 inverter is 60 amps @ 48 volts with an input of 16 or so amps AC. Later, Bob From: [email protected] [mailto:[email protected]] On Behalf Of benn kilburn Sent: Thursday, June 17, 2010 7:22 PM To: Wrenches Subject: [RE-wrenches] Additional Battery Charger G'day Wrenches, I'm looking for an additional charger(s) to increase the charging capacity from the back-up 12 kW Onan generator into the 1200 Ah battery. Right now the generator's full potential output is limited by the charging capacity of the two VFX3648's which have a max charge output of 45A each. The idea here is to use the generator to its full charging capacity when it is running, taking in to consideration that the generator will feed any AC loads before charging the battery. Iota and IBE chargers have been suggested. Any comments on these or other makes? Do all generator types (diesel, propane, LNG, gasoline) run more efficiently when fully loaded? or is this only the case with diesel (so i've heard)? thanks, benn DayStar Renewable Energy Inc. [email protected] 780-906-7807 HAVE A SUNNY DAY CONFIDENTIALITY NOTICE: This email, including any attachments, contains information from DayStar Renewable Energy Inc. and/or its affiliates, which may be confidential or privileged. The information is intended to be for the use of the individual or entity named above. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited. If you have received this email in error, please notify the sender immediately by "reply to sender only" message and destroy all electronic and hard copies of the communication, including attachments. Enter for a chance to get your town photo on Bing.ca! Submit a Photo Now! Enter for a chance to get your town photo on Bing.ca! 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