Battery New Pv Install Looking What Battery Storage & Monitoring To Look At.

[marc8]

Hi All

just got the panels up today on my own house install went fairly well, 8 on 8, 2 strings, south facing, Seraphim 250 watts.

Just looking for battery storage & monitoring of the system so I can log in & show potential savings, unsure if this is possible or not, never installed battery unit before.

any preferences or help appreciated ?

 

[TJ Anderson]

This baby will get you sorted out.

https://www.google.co.uk/aclk?sa=L&ai=C6NDMMYljVsXEJJTMbfylsbAFuvqlrgfaj87ivAHC7OKT6wMIBBABIPT06BgoCmC7hoCA0ArIAQepAgQZUTdoWLk-qgQnT9DFh3DiI2W62SHECaIqTVn88F_H8g_nTB6HXh34NIje2CBYkuaGgAWz-P4YwAUFoAYm2AYEgAfipeMciAcBkAcCqAemvhvYBwHgEsbFrNrzjNqf_AE&sig=AOD64_0jimEM4HSaObSFZPAngsmBSatU-g&ctype=5&clui=5&q=&ved=0ahUKEwi2v6HhhMbJAhWHSRoKHVWoAHMQwg8IHA&adurl=http://rover.ebay.com/rover/1/710-134428-41853-0/2%3Fipn%3Dicep%26icep_id%3D67%26mtid%3D1673%26kwid%3D1%26crlp%3D50600204586_563391%26icep_item_id%3D161836343339%26itemid%3D161836343339%26icep_meta_categ_id%3D293%26icep_etrs%3DN%26icep_epid%3D-999%26icep_ctlg%3D-999%26icep_cond%3DNew%26targetid%3D131843274306%26rlsatarget%3Daud-133395220866la-131843274306%26rpc%3D0.19%26rpc_upld_id%3D59814%26device%3Dt%26icep_msku_flag%3Dn%26icep_cbt%3Dn%26adtype%3Dpla%26loc%3D1006664%26poi%3D1006676%26campaignid%3D207297426%26adgroupid%3D13585920426

 

[marc8]

Hi TJ Anderson

looking maybe slightly more than charging a couple of AA's, nice link though.
thanks

 

[Worcester]

Storage is about 3 years away from economic viability, unless you just want to spend some money to boast about it...

Monitoring:
eco eye
elios 4 you
immersun with montoring

 

[marc8]

Hi Worcester
as a contractor with feet in both camps solar & electrics the system has not cost me a great deal, looking at putting in as a selling tool with monitoring so can show customers potential savings.

 

[Worcester]

Hi Worcester
as a contractor with feet in both camps solar & electrics the system has not cost me a great deal, looking at putting in as a selling tool with monitoring so can show customers potential savings.

No difference, batterry back up systems still make no financial sense (yet) even in the US, where there is a lot of interest in products such as the Tesla Powerwall, they acknowledge the greater cost of batteries than power purchase.

 

[Gavin A]

I'll contradict Worcester to say that there are some niche situations where battery storage makes financial sense, but only with big lead acid systems with 6-7p / kWh lifetime storage costs vs 10-12p/kWh for the Li-Ion battery packs.

We have half a dozen systems out there at the moment that made economic sense, in part though it's because we're using them to enable us to install bigger pv systems onto restricted grid capacities.

 

[Worcester]

I'll contradict Worcester to say that there are some niche situations where battery storage makes financial sense, but only with big lead acid systems with 6-7p / kWh lifetime storage costs vs 10-12p/kWh for the Li-Ion battery packs.

We have half a dozen systems out there at the moment that made economic sense, in part though it's because we're using them to enable us to install bigger pv systems onto restricted grid capacities.

I don't disagree

The OP is looking at a 4kW system and battery storage of probably 4-10kWh; different economics.

Here's the original discussion: http://www.electriciansforums.co.uk/photovoltaic-solar-panels-forum/101768-storage-way-forward.html

and a useful document: http://www.bre.co.uk/filelibrary/events/BRE Events/Jonny Williams/9-Martin-Cotterell.pdf

 

[marc8]

Hi All thanks for response will let u know what i go for, as the system installed did not run me a lot well nothing really apart from time, scaffold & a roofer, that was about it.

 

[marc8]

Hi All

got the set up on the 24th, bought SolaX Hybrid SK-SU3700C, with Battery unit.

lucky I can say it's going in my loft. the unit is around 850mm x 724mm, without the rack unit for the batteries spent most of yesterday building an IT rack to install the battery units.

any how will get some pictures up when installed.


Just having a quick look at the energy advisory service uk, using the calculations given on the battery & the BRE guidelines.

This battery has a total capacity of xxxkWh (at the C20 rate). However, toensure a good battery life, the system is designed to cycle the battery down tono more than xx% discharged – this means an effective usable capacity ofxxxkWh – this equates to a 100W light bulb operating for xxhours

Cost of Battery storage £2000.00 this is less the cost of the Inverter (800.00) not taken into account rack
cost of electric taken average 13p per unit
20% in battery after discharge 5KW battery unit total 4.166KW

100W lamp running for 10 hours uses 1KW hour of electric (1KWH)

10 x 4.16 = 41.6 hours

41.6 x 0.13p £5.40

to break even on my battery storage system I will need it to fully charge & discharge 370 times to break even. simple calculations used & information provided in the earlier responses to my post.
the above is just saying if the battery unit fully charges & discharges to 20% I would save £5.40 each cycle.

unless I have missed something.