Renewable Energy and Sustainability Forum
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Anyone wishing to register as a new member on the forum is strongly recommended to use a "proper" email address - following recent spam/hack attempts on the forum, all security is set to "high", and "disposable" email addresses like Gmail, Yahoo and Hotmail tend to be viewed with suspicion, and the application rejected if there is any doubt whatsoever
Recent Articles: Navitron Partners With Solax to Help Create A More Sustainable Future | Navitron Calls for Increased Carbon Footprint Reduction In Light of Earth Overshoot Day | A plea from The David School - Issue 18
   Home   Help Search Login Register  
Pages: [1]   Go Down
Author Topic: Is my output normal  (Read 2267 times)
Offline Offline

Posts: 14

16 250w panels sw leeds

« on: April 18, 2014, 11:44:21 AM »

Hi just see my out put at midday at 3300w on my 4kw system sun now bang on with panels .inverter max is 3.6kw is output normal ?

Hail Glorious Sun
Hero Member
Offline Offline

Posts: 1067

« Reply #1 on: April 18, 2014, 12:54:59 PM »

3.3kW also from my 4kw system.

Unless you have Sanyo panels, expect it to be lower in hotter months due to the panel voltage decreasing with temperature.

My highest peak in 3 years has been 3.498kW and the highest daily output 25.26kWh.
« Last Edit: April 18, 2014, 01:09:54 PM by supremetwo » Logged

Hero Member
Online Online

Posts: 1656

« Reply #2 on: April 18, 2014, 03:56:19 PM »

1.98 kWp system, inverter is just maxing out at 1700w.
The inverter is throttling the output from the panels slightly
Just as a comparison.

1.98kWp PV (11 x Sharp 180 and SB 2.5)
20 x 65mm Thermal and 180ltr unvented
Powervault 4Kw - G200 Lithium-Ion (LiFePO4)
9000ltr rainwater storage   Plymouth
Jr. Member
Offline Offline

Posts: 96

« Reply #3 on: April 18, 2014, 08:54:54 PM »

Peaked at 1-30 today at 2933 from a 3290 system with 20.5 kWh for the day.
Hero Member
Offline Offline

Posts: 650

« Reply #4 on: April 18, 2014, 09:49:51 PM »

3.92 system held at 3.608 max.  It often reaches the 3.608 and can hold there for about 1.5 hours each side of 'midday'.  However there are times in full sunshine when it does not reach the 3.608 and recently 3.3 to 3.5 has been the norm. Apart from temperature and panel angle I think that sometimes there is a haze or other atmospheric conditions which can led to a reduced output. Rarely see 3.608 before March each year.


3.92w freestanding PV with sb3300 +Imersun
21kw Stratford T70 woodburner
 300litre thermalstore with 3kw and 1kw immersions
 Wall star 25kw oil boiler
  Spring water supply with uv and ro membrane
 Sheep, poly tunnel and approx 80 sq m of raised veg beds.
Offline Offline

Posts: 7

« Reply #5 on: April 20, 2014, 08:35:59 PM »

My 4kw system puts out slightly more, 4180w max. I have canadian solar panels with Solarmax inverter, today it achieved 28.7kw, best day this year so far but also managed 28kW on the 18th this month.
I am in north east Scotland up in Aberdeen (yes it is colder   winter but we do get sun!) with a south facing system.
Yield to date this year from 1st jan is 934kW, last year it achieved 3898kW   Smiley

Eccentric Anomaly
Sr. Member
Offline Offline

Posts: 404

« Reply #6 on: April 20, 2014, 10:59:06 PM »

28.7 kWh.

And the north starts at the Dornoch Firth.  snow  Smiley

He who refuses to do arithmetic is doomed to talk nonsense - John McCarthy.
Hero Member
Offline Offline

Posts: 4320

« Reply #7 on: April 21, 2014, 07:54:48 AM »

Try cleaning the panels. Bird poo and dust will not help.

Pic of wheel on day 1
7.2kW Waterwheel and 9.8kW PV
Hero Member
Offline Offline

Posts: 1928

« Reply #8 on: April 21, 2014, 09:22:53 AM »

Normal?  What is normal?

The really simple basic measure of the output from your panels is the kWh/kWp figure.

However, remember there will be a range of possible results for any and every installation.

The montly comparative figures posted on this forum can be about +100% to perhaps -50% of the average figure quoted for all responders.

Not all of those responding will have the best possible outputs for a range of various reasons.

The figure will depend on location, position, direction, angle of tilt, type of panel, weather, shading, system type and possibly several other factors.

If an mcs/fit system, you will, no doubt, have (or should have) been supplied with a standard assessment predicting typical expected production even before you decided to purchase.  Comparing output to that is the only real way of deciding for any particular isolated situation.  That, or compare it with another very local system which is similar to yours in all respects.

« Last Edit: April 21, 2014, 09:24:58 AM by oliver90owner » Logged
Pages: [1]   Go Up
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines
SMFAds for Free Forums
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!