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

[matthunt]

@matthunt. I'm not being derogatory. I'm trying to get to the bottom of the technology.

I've got very detailed generation, consumption, power diversion and export of my own systems and a number of others for the last 3 years (there are 18 different environmental and energy monitors on my property), and know how difficult it is to use what you generate and store.

I understand the principles of most of the storage systems, even with the SolaX if you do configure it into 'force time use' mode (so it charges the batteries before self consumption) you're still not likely to be in a net gain situation over a considerable number of days in the year - just look at the generation figures above, and even the average household can use 35% of their annual generation by tweaking their usage habits. Even if you could use 4kW/day over a whole year = 1460kWh that is still only represents 44% of most homes annual usage. So in practice in most instances you'll still want to prioritise self consumption over generation, so that the benefits are cumulative not replacement. Even so you'll struggle to get above 75% when only having 4kWh of storage available. You need to look closely at consumption and generation profiles to work out the actual optimum storage capacity (see here https://www.elexon.co.uk/reference/technical-operations/profiling/ ) Just in case you didn't know it your profile is part of the information displayed above your MPAN on your leccy bill

I was NOT criticising marc8, or the Solax system, as I mentioned earlier marc8 is clearly an innovator (see Geoffrey Moore, Crossing the chasm) and the industry needs those guys

What we need for the next group - the early adopters is some good factual information on the real life performance of storage systems, and we need it as soon as possible, so that they can relate themselves as to how to use it and the benefits that they will get from it. - They will put their own value on the technology, they will however expect it to work and perform as stated - and that's the current issue we don't have that data - the price is not such an issue for this group (think people that always by the latest iPhone / Galaxy phone as soon as it comes out)

The big market place is the early majority, and these guys want well established references and tests and for it to be an established technology so they are at least 2 years away, that ties in nicely with battery development and costs

Very good response Worcester

 

[matthunt]

For storage technologies to become viable we need to slow down the flow rate of the consumption, if you install a Voltage Optimiser with battery storage then in essence your batteries will discharge slower, North West Electricity's 'Smart street' project admits for the first time by a (DNO) that by reducing the voltage you will consume less and this will ultimately create additional headroom on the grid for additional microgeneration

 

[Worcester]

For storage technologies to become viable we need to slow down the flow rate of the consumption, if you install a Voltage Optimiser with battery storage then in essence your batteries will discharge slower,

The problem you then get is that the G83 or G59 parameters need to be measured grid side of the VO to be compliant (and rightly so when you think about it).. So if the battery or solar inverter are consumption side of the VO product you'll need a control panel grid side to disconnect the inverter(s). In practice the way VO works from a consumption point of view it shouldn't matter if the battery inverter is placed grid side..

 

[matthunt]

The problem you then get is that the G83 or G59 parameters need to be measured grid side of the VO to be compliant (and rightly so when you think about it).. So if the battery or solar inverter are consumption side of the VO product you'll need a control panel grid side to disconnect the inverter(s). In practice the way VO works from a consumption point of view it shouldn't matter if the battery inverter is placed grid side..

Hi Worcester, indeed you cannot supply any micro-generation from a standard voltage optimiser, there is a product called the b60pvm which supplies the PV at grid voltage and still gains the benefit of energy savings within the property through voltage reduction compliantly, additionally a product called the PV+ does exactly what you are saying by measuring the grid voltage and bringing the inverter in and out of circuit if the grid voltage rises above CENELEC limits.

With these types of products then battery storage becomes viable as u slow down or restrict the demand and as such the batteries will last longer in between charges !

 

[SibertSolar]

@ Matt - are you the Matt Hunt from Matt-e voltage optimisation manufacturers?

 

[matthunt]

@ Matt - are you the Matt Hunt from Matt-e voltage optimisation manufacturers?

Hi sibertsolar, yes indeed it is.
it is not just voltage optimisers we develop though, we also do connection centres and metering solutions for PV and battery ( customer consumption billing and /or export)

 

[SibertSolar]

ok, thanks, thought so.