#1 May 6, 2015 07:19:59

rogerhoward
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Moixa's 'Maslow' battery trials

Are any Microgen customers of “Good Energy” taking part in their trials of the Maslow domestic battery - http://www.meetmaslow.com ? Or are any other Microgen data donors?
I gather that domestic batteries are taking off over in Germany but I've no idea what their experience has been so far (always ahead of us over there, aren't they?).



Economy 10 tariff provides 6.9p/kWh off-peak import between 12am-5am, 1pm-4pm and 8pm-10pm; http://www.pvoutput.org/aggregate.jsp?id=21047&sid=18934&v=2&t=m on approx. 63% off-peak usage, 22% solar usage, and 15% peak-rate usage.
1,900kWh annually is exported, mostly in summer, on approx. 3,200kWh generation. Approx. 4,500kWh/year is imported, mostly for (a) winter and springtime off-peak Storage Heaters, and (b) off-peak hot water Immersion heating (which is “dumb”, i.e. not linked to the solar PV).
PV array is split East-West. Income is from Phase II 21p/kWh Feed-in-Tariff plus smart metered 3.2p/kWh Export Tariff.

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#2 May 7, 2015 15:12:04

morrisok
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Moixa's 'Maslow' battery trials

Nope but I have registered my interest in it, looks interesting. Well found.



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 June 1, 2015 16:05:38

Rick M
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Moixa's 'Maslow' battery trials

Thanks Roger. Interesting. No prices given though.

Tesla Powerwall (7kWh daily cycle, 10 kWh weekly cycle models) is to be launched in the US this summer ( www.teslamotors.com/en_GB/powerwall ).

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#4 June 4, 2015 16:23:46

Rick M
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Moixa's 'Maslow' battery trials

Thinking about the content of their website, the Moixa products must sit on the DC side of the inverter in order to charge up and supply DC devices (LED lights, computers etc). In my case (at least), my generation meter sits on the AC side of my inverter. So, any power drawn by the Moixa device will never register on the generation meter.

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#5 June 5, 2015 08:41:08

bhommels
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Moixa's 'Maslow' battery trials

Hi Rick,
Yes, this is how for example the Nedap Powerrouters work as well. Excellent engineering, but not optimised for UK FiT payments: since the “import” tariff is much lower than FiT generation tariff, the battery costs money instead of saving it.

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#6 June 5, 2015 08:53:59

morrisok
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Moixa's 'Maslow' battery trials

Hi Guys,

They got in touch with me about partaking in the trial. Some info I got:

They wanted £1,000 for a 2kwh battery, this is heavily subsidised price and includes installation and VAT.

They offered an extra 1 kwh at ~£250.

He talked about it getting its electricity from another fuse on the fuseboard (same as if it was plugged in) so AC side of things, I assume specifically because its for a UK trial.

He said on average people are saving about 1.6kwh a day.

It discharges to 20% capacity so there is only 80% usable battery anyway.

From what he told me its just not even nearly cost effective or useful to me, I use alot more than 2kwh overnight so it would be empty every night.

He said there are plans to bring out extra battery packs to over double the capacity but that won't be till 2016 ish.

Good Energy were offering it FOC but they have run out of capacity now.

From what they said it was not just driving DC outputs (although thats whats most efficient) but also back into the main house (I believe).



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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#7 June 6, 2015 03:07:46

rogerhoward
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Moixa's 'Maslow' battery trials

Given that the whole setup is only intended to cover the lighting circuits plus digital devices via the supplied DC power adapter hub, I find it difficult to imagine people saving as much as 1.6kwh/day. The 1kW version would certainly be more than enough for our household (they didn't mention how much they were did they Kevin?)

The quoted price seems fairly reasonable given that it covers the installation of (a) the DC-converted lighting circuits for LED lighting and (b) the DC power adapter.
I'd in any case been thinking about the desirability of the latter to replace my floor forest of AC/DC adapters for each and every device, each giving off heat (and hence each taking more energy that's only used for unnecessary heat). Similarly, being already an enthusiastic convert to LED lights I'd also be interested in having my lighting circuits converted to DC but hadn't previously realised that existing circuits could simply be utilised.

In my case I think I'll look into the cost, apparently modest from these impressions, of getting both of these upgrades - but without the battery.



Economy 10 tariff provides 6.9p/kWh off-peak import between 12am-5am, 1pm-4pm and 8pm-10pm; http://www.pvoutput.org/aggregate.jsp?id=21047&sid=18934&v=2&t=m on approx. 63% off-peak usage, 22% solar usage, and 15% peak-rate usage.
1,900kWh annually is exported, mostly in summer, on approx. 3,200kWh generation. Approx. 4,500kWh/year is imported, mostly for (a) winter and springtime off-peak Storage Heaters, and (b) off-peak hot water Immersion heating (which is “dumb”, i.e. not linked to the solar PV).
PV array is split East-West. Income is from Phase II 21p/kWh Feed-in-Tariff plus smart metered 3.2p/kWh Export Tariff.

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#8 June 19, 2015 07:29:43

WendyNorthrop
Registered: 2012-04-23
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Moixa's 'Maslow' battery trials

I am a GE customer. I looked at trialling one of these devices but found that the proposed capacity was too small for my requirement. The TESLA Powerwall (which seemingly has built up a large forward-order book?) which has a larger per unit capacity seems like a more appropriate product…

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#9 June 19, 2015 07:49:09

morrisok
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Moixa's 'Maslow' battery trials

WendyNorthrop
I am a GE customer. I looked at trialling one of these devices but found that the proposed capacity was too small for my requirement. The TESLA Powerwall (which seemingly has built up a large forward-order book?) which has a larger per unit capacity seems like a more appropriate product…

I agree Wendy, but as far as I know the TESLA powerwall isn't available in the UK and no dates given They might not be the answer but they will certainly move the goalposts in the right direction.



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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#10 June 19, 2015 14:25:06

Capetown
From: The Banks Of The River Mole
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Moixa's 'Maslow' battery trials

Just done a “back of a fag packet” calculation. Use 3 kWh stored in the battery (from daytime generation) every night throughout the year (optimistic I know). So that makes 15p minus 3.44p (Cost of electricity from the grid minus the amount you would have got if you exported it). That equals 11.56p per kWh times 3 for a daily saving, equals about 35p. Times by 365 to find the saving over a year, and by 10, (the guarantee period for the battery) equals £1277.50.



The gene pool has no lifeguard!

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