DIY ESS - Savings = 320 EUR / 80+% of Usage covered by Solar + both Energy Storage Systems

DIY ESS Update:

- Savings went past 320 EUR (over a year and 2 months)

- 80+% of my Home Usage is covered by Solar  + both Energy Storage Systems these days :)

Screenshots from http://wattson.energyhive.com/dashboard/diyesskit :

More on my DIY ESS Kit here: http://www.diyesskit.com

DIY ESS - Cranking up slowly

Saturday morning, the ESS cranking up its power output to make the Net Usage get close to 0W



http://www.diyesskit.com

Found a good spot for my New Special Edition Wattson

The Wattson Special Edition is now in the stairs ... I can see Net Usage even when sitting at my desk and online on the Mac

- Video below -

BTW did you notice the motion detection LED lights in the stairs, simple and efficient at night, there is one in each corner - 4 total, but I will make a special video and post on my LED lighting in the entire apartment -

They are battery operated and these are charged from solar when empty ...

The DC power supply is plugged right next to it, with a UK to European adaptor

Negative display: the ESS will trigger another 92W charger to use this Surplus and remain in Blue - low consumption, see the video below -

Exact width ...

The 9V power supply cable fits right behind the inter-step support 

And now, even better with the Colours in the back

Keep it blue ... that's what the ESS does all day long

Unisolar PVL - 1000W reached yesterday !

994W exactly ... First time I see so much on my Solar System since July 7th, the SMA inverter installation day

It is true that I have almost 1,200Wp (Watt Peak) installed on the roof

1 x 31Wp
6 x 68Wp = 408Wp
6 x 124Wp = 744Wp
Total = 31 + 408 + 744 = 1,183Wp

My First Full Day of Solar Generation & ESS, Live !

Waking up around 6AM, I waited patiently for the SMA Grid Tie Inverter to start producing from Solar this morning, and it did at exactly 7AM, with 150W

The forecast for today looks very good: Sunny all the way !


6 AM : 0W produced, 141W used

8 AM : It went up slowly but steadily to 200W roughly around 8AM

and the progression goes on ... and my ESS is working fine as you can see :-)
Follow the Graph provided by Wattson Anywhere portal here


ESS already doing its job : charging its battery pack with Solar Juice
Solar Generation on the left, Net Usage on the right


Net Usage = 12W - during breakfast -

Going up steadily during the morning

Still close to 0W thanks to the ESS absorbing the surplus of Solar Energy

Oops, there is alittle gap in production; Did the inverter stop and restarted or maybe a data logging issue (?), anyways it did not last long

Back to normal

Here, my wife must be cooking because the house Usage went up, but the ESS went to Grid Tie Mode and pushed close to 2000W to help, it is all working as expected :-)

Shortly after, the Usage goes down and the ESS goes back to Charger Mode, bringing the Net Usage close to 0W

Around 2 PM, the maximum number of Chargers are ON in the ESS and we still have some 100W of surplus, wasted ...

From 1PM to 5PM, after a plateau, we have a steady slope from 850W to 500W of Solar Production



Coming back home around 7:30 PM, the air conditioning had been on for 20mn, and the ESS was pushing several hundreds of Watts to help; I opened the metal cabinet to see what was going on inside and the battery pack voltage

You can see the ESS helping - a lot - the solar production to compensate the Air Conditioning consumption at the bottom right on the graph: more or less 600W during diner

Like yesterday, 5 or 10mn after 9 PM, the Sunny Boy quits and all the power from now on is coming from the ESS - mostly - : TV, DVD player, fan, etc ... and later on the Water Heater - which will empty the ESS battery pack eventually -

The next day I could visualize the Energy Analysis tab on Wattson Anywhere online portal and you can see that 2/3rd of the Energy used comes from Solar - Direct or Stored - and that almost all the Solar Energy has been self consumed in-house :-)

LiFePO4 ESS - Last night testing with 2 Wattson Monitors

Last night I was testing my LiFePO4 ESS as usual, after a full day of charge, and this time I brought the 2nd Wattson downstairs in my bedroom to display Usage, Generation, or Net Power

Instead of turning the ESS off when the low rate TOU comes in at 22:26 (10:26 PM), I decided to leave it on and see how it bahaves, poushing all it can for a full hour

At the end of this hour, the new 35mm2 longer cables were just luke warm, nothing was over-heating at all

Power graph (iPhone)

Power graph (iPad)

Energy graph

Energy Analysis

LiFePO4 DIY ESS - The effect of TV on Home Usage & ESS Generation

Check out the effect of TV making my Home Usage go up and down, along with the screen brightness, and see how my LiFePO4 ESS is reacting to this generating more or less Power to cover this

LiFePO4 ESS - Keeping it Low

Keeping the usage as low as possible yesterday with the DIY ESS Kit

Wattson Anywhere graphs of the day