What is the Spg (use a good refractometer)of each cell 1.11?1.15? that temp is
not to hi especially w/ the temp comp. Charging w/ the unit in bulk, the
inverter will see voltage rise quickly and decide that they are charged.
disconnect the batteries and check as individual units Eq at high volt
Folks,
I was looking at the SMA micro inverter and notice only connections for
L1, L2 and earth. I thought all grid tied inverters needed a neutral
sense conductor to monitor for phase loss.
Any ideas?
Mark Frye
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Mark,
There are many inverters that do not have a neutral-just not many
single-phase inverters. Since all inverters must have at least an equipment
ground, the phases can be compared with ground. The testing standard covers
what is required. If neutral-ground bond is lost, it will show up in a
Bill,
I forgot to mention that your charge voltage is very low for most L16's. what
is the make/model of the batteries?
Larry
On Dec 18, 2013, at 11:28 PM, frenergy wrote:
Gentlemen and women,
I have been called in to deal with a pack of 16 (4 strings of 4 for
24V), L-16s, 6 years
You can waste lots of time trying to save an already dieing set of
batteries, or just cut to the chase and install a new set. L16s are not
a long life battery. While some folks can baby them and get 10 years,
I've seen failures at less than 5 years. Compare cycle life; most L16s
are only 600
Hi guys -
Concerning the 120% rule: I've encountered several circumstances recently where
a 400A nameplate-rated (listed on inside label) main panel has two 200A main
breakers. One of the breakers will be feeding the busbar in the main and the
other will feed a subpanel. I had previously though
Wrenches,
Through a circuitous route I have come across Dynapro Batteries -
the name, not any of the actual batteries. They basically
manufacture and distribute flooded fork lift batteries at
(relatively) low prices and freight included. Most are made as 12V
sets with
Bill
With 4 parallel strings at 6 years you surely will have some bad cells. I would
let the bank sit (with no load or charge) for at least 8 hours, or if you can
24 hours and simply do a voltage check. You can't get a good 6 volt battery
below 6 volts (at rest) so eliminate the 4 lowest voltag
Allan
The name rings a bell, they might be produced by Dyno Battery out of Seattle
206-283-7450
Kind regards
Tom Duffy
Senior Solar Design Engineer
[Real-logo-X-195]
E-Mail: t...@thesolar.biz
Panama Office: 507-6126-1253
Direct Toll Free: 888-503-6772
International: 575-539-2111
SKYPE Address:
Best bet is to contact the manufacturer of the equipment and get documentation.
Typos courtesy of my iPhone.
> On Dec 19, 2013, at 2:16 PM, "SunHarvest" wrote:
>
> Hi guys -
>
> Concerning the 120% rule: I've encountered several circumstances recently
> where a 400A nameplate-rated (listed
The 120% rule refers to source breakers, not load breakers.
On Thu, Dec 19, 2013 at 3:16 PM, SunHarvest wrote:
> Hi guys -
>
> Concerning the 120% rule: I've encountered several circumstances recently
> where a 400A nameplate-rated (listed on inside label) main panel has two
> 200A main breake
Eric:
Greetings! These panels are called 320 series because the sockets are rated
for 320 amps continuous duty.
Your calculations are based on the main OCPD ratings. You can add 40 amps of
backfed OPCDs to the internal bus and to the external load center if you use
200A breakers. You can dow
Sounds like I may be misinterpreting something but I don't think so...
NFPA 70, 2014 NEC 705.12(D2)(3)(b) states, "The sum of 125% of the inverter(s)
output circuit current and the rating of the overcurrent device protecting the
busbar shall not exceed 120% of the ampacity of the busbar."
Based
Eric:
Check which code version your AHJ is using. Earlier versions calculated solely
on OCPD ratings. CA building codes are based on NEC 2008 for 11 more days, then
2011.
William
> On Dec 19, 2013, at 4:03 PM, "SunHarvest" wrote:
>
> Sounds like I may be misinterpreting something but I do
Eric:
Here is another distinction to make:
1.In PG&E territory, the largest service that is direct metered is 320
amps (continuous). This may be likely in many other areas.
2.Above that, the metering is all done with CTs (current transformers).
3.If you pull a direct meter
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