PNjunction wrote: »
Wow - no offense, but this is pivotal and I have to use all caps:
DO NOT FOLLOW THE VOLTAGES LISTED IN THAT LINK FOR YOUR LIFEPO'4S - THEY ARE FOR A DIFFERENT LI-ION CHEMISTRY
Once again, I'll point out a great REAL-WORLD thread that describes in great detail how to do it with the chemistry we ARE using:
I can see that this has quickly devolved into a technical p*ssing match between real-world hands on, vs someone who doesn't actually own a bank of his own. Until you have one, all we'll end up doing is throwing links at each other, which does lurkers no good.
It is for this very reason, that most real-world users try to avoid armchair-engineering squabbles and eventually go silent. Although that might be to the relief of the crowd.
offgrid me wrote: »
For anybody that has a problem with an older Trace SW/SW+ or DR-series, contact this guy using his web form on his site:
He'll get it working again.
I think this is the one
Below is a list of companies that can repair the old Trace inverters.
I suggest Sunpumps.
Old black trace inverters
Northern Arizona Wind and Sun
Blackcherry04 wrote: »
Here are the parts you need, only you know if they are cost effective.
The problem is buying components is you don't know what the problem is and if one thing went bad what else did it take out. You buy it on a one way trip, if it's doesn't work you eat the cost. I'll take a new one with a warranty and sleep better.
greensolarelectric wrote: »
I repair/refurbish SMA Grid tie inverters. I offer a 6 month warranty on all repaired inverters. And i offer a 1 year warranty for a additional $50
Most repairs cost from $200-$600.
jclothi wrote: »
How did your situation work out, regarding the failed swr 2500? Did you find a repair service?
If not, I can help you. I am retired but I will help people (only) that are financially squeezed (and screwed by sma!) and simply will be unable to get back on line, otherwise. Why cant they understand that there is good will to be had in providing support? Anyone with your experience may be expected to never buy another sma product, huh!
jclothi -at- attglobal.net
Compuhans wrote: »
I have been repairing various solar inverters for people who had a inverter go bad that is out of warranty, usually they can be restored to where years of life are added to the unit.
I fix Sunnyboy 1800 2100 2500 3000 4000, Xantrex , Power One Aurora and PV powered ( and likely others if they came across my workbench)
Only in case of catastrophic burnout do I tell them to throw them out.
verdigo wrote: »
I found these old DOD videos on YouTube . I'm pretty sure I seen these in my Army days, and thought they might be useful for some here.
https://www.youtube.com/watch?v=DjYePMNOQXw [How AC Generators and Motors Work]
https://www.youtube.com/watch?v=MXQzUhORgKM [How DC Generators Work]
Specific Gravity vs Applications
1.285 Heavily cycled batteries such as for forklifts (traction).
1.260 Automotive (SLI)
1.250 UPS – Standby with high momentary discharge current requirement.
1.215 Geral applications such as power utility and telephone.
As mentioned earlier, the specific gravity (spgr.) of a fully charged industrial battery, or traction battery, is generally 1.285,
depending on the manufacturer and type. Some manufacturers use
specific gravities as high as 1.320 in an attempt to gain
additional Ah capacity, but at the cost of a shorter cycle life.
Higher Gravity = vs Lower Gravity =
More capacity / Less capacity
Shorter life / Longer life
Higher momentary discharge rates / Lower momentary discharge rates
Less adaptable to "floating: operation / More adaptable to "floating" operation
More standing loss / Less standing loss
Specific gravity = single-cell open-circuit voltage - 0.845 (example: 2.13v – 0.845 = 1.285)
Single-cell open circuit voltage = specific gravity + 0.845.
The lighting & grip website has been
revamped, but I found the generator page. It's basically talking about
cheap inverter generators having square and mod sine output, and that
even PSW inverter and conventional generators, seeing strangely reactive
loads instead of "old style" restive loads, are unable to provide sine
waves and the loading distorts the waveform (much as I have experienced
with my new small robin/subaru/hatz genset) it's very interesting and
should be required reading.http://www.screenlightandgrip.com/html/emailnewsletter_generators.html#anchorSquare Wave Generators