#1 Feb. 13, 2018 16:50:50

SteveRogers
Registered: 2011-12-08
Posts: 201
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Is this forum past its sell by date?

Apart from the occasional interesting post (usually by longstanding users that I recognise) this forum seems to have been in serious decline for a while. We have been through a few bouts of spam which may have put some off. Or maybe our systems are now mature and we all know most things we need/wish to know.

Sheffield do not seem to take any interest or do anything much with our data. The last report was Q1 2017. The performance map has always been pretty useless as it is biased by one or two systems that have unbelievable performances (e.g. URN 7053 north of Newcastle-on-Tyne - if those data are real I'd love to know how they are achieved).

There are topics still of great interest to me eg storage systems, whether it's worth installing PV with the greatly reduced FIT rates.

Maybe I'm just in grumpy mood but what do others think?

Steve
URN 215

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#2 Feb. 25, 2018 08:23:58

morrisok
From: Sussex
Registered: 2011-11-09
Posts: 79
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Is this forum past its sell by date?

Hi Steve,

I agree, it's a shame. You can't blame the Sheffield team for the lack of use of the forum but I do agree that with the amount of data they are receiving from us all it would be nice for them to give us some more useful information and statistics. I get more from pvoutput now than I do from this database.



Kevin

URN 131, 3.92KWp 12x 327W E20 SunPower panels Sunnyboy 4000 inverter, facing ~south, no shading issues. Location: Sussex, http://pvoutput.org/list.jsp?userid=12216

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#3 March 1, 2018 12:36:12

linesrg
From: Clatt, Aberdeenshire
Registered: 2017-04-30
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Is this forum past its sell by date?

Good Afternoon,

I'm a relative newcomer to the site. I'm here simply to contribute my Solar PV on a monthly basis having found out about it via the Gridwatch Templar.

I've been a member of the Navitron forum since 2008 and feel far more can be gained from that site.

Regards

Richard



1.28kW ROC/ FIT and 2.56k FIT and SMA inverters. 1.675kW fitted to Growatt SP2000 via SMA inverter. CTC GSi12 heat pump with 3 x Navitron 4720AL Solar ET panels coupled to 300ltr EHS. Renault Zoe on the way…

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#4 March 2, 2018 08:53:48

BackYardSolar
From: Surrey, on Gatwick flight path
Registered: 2015-05-30
Posts: 46
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Is this forum past its sell by date?

Hi SteveRogers.

I agree, as I had reported the spam on two occasions as Sheffield Solar don't seem to monitor the Forum.

I have just installed a homemade battery system (ESS) using a Victron 24/1600 multiplus and six 8V golf cart batteries giving 24V at 340A capacity. However since the install the sun has been less than co-operative and the very low temperatures not helping.

My view is that battery systems are still too expensive but I just wanted to experiment. Still to early to say how it is going but as I was feeding nearly 2MWh of surplus PV into hot water and night storage I thought I would try and offset my weekday 22p tariff with a bit of battery power.

I now still heat the water first then any other surplus goes into the battery. Still playing but would be good to hear from any others doing the same.

I suspect that this is just the wrong forum, as a lot of what interests us is specialised.

Regards BYS.



SolarEdge SE4000 inverter, 16 x Romag powerglaz 235W panels. South facing at 30 degree angle in Surrey just East of Gatwick and under the flight path.

ESS AC coupled system using a Victron Multiplus 24V/1600VA Inverter/Charger - 8.16kW Trojan 875 battery bank.

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#5 March 2, 2018 12:38:38

morrisok
From: Sussex
Registered: 2011-11-09
Posts: 79
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Is this forum past its sell by date?

Hi BackYardSolar,

I'm busy building a 48V system from old laptop cells (18650's) its the only way its going to be cost effective and even that is debatable. Certainly after the amount of work it is going to be to do it.



Kevin

URN 131, 3.92KWp 12x 327W E20 SunPower panels Sunnyboy 4000 inverter, facing ~south, no shading issues. Location: Sussex, http://pvoutput.org/list.jsp?userid=12216

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#6 March 3, 2018 09:49:24

BackYardSolar
From: Surrey, on Gatwick flight path
Registered: 2015-05-30
Posts: 46
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Hi morrisok,

I have been watching all the people on DIY Powerwall building their batteries from used laptop cells and have even read the book DIY Lithium batteries.

I would agree Lithium is a better way to go than Lead acid in terms of cell capacity usage, I think the complexities of using Lithium with all issues of buying a spot welder for the construction and battery management issues not to mention all the time involved to test and build the batteries I decided against it.

I was thinking of two 14S20P batteries using Headway cells but the cost, availability, time and complexity put me off.

I would recommend a Victron 48V Multiplus system as your charger/inverter as it is a robust product that will work with Lithium batteries and very controllable, if not a little expensive.

I use a Hub-4 setup with Colour controller, BMS and the Multiplus 24V 1600VA. To protect my batteries I only charge or discharge at a 30A (800W) maximum using only 25% of the battery capacity. Early days yet, only been working for a month.

Regards, BYS.



SolarEdge SE4000 inverter, 16 x Romag powerglaz 235W panels. South facing at 30 degree angle in Surrey just East of Gatwick and under the flight path.

ESS AC coupled system using a Victron Multiplus 24V/1600VA Inverter/Charger - 8.16kW Trojan 875 battery bank.

Edited BackYardSolar (March 3, 2018 09:51:48)

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