# PV Diversion strategy **URL:** \ **Category:** Applications\ **Tags:** diversion, solarpv\ **Created:** [4 November 2016 10:22 UTC](https://community.openenergymonitor.org/t/pv-diversion-strategy/2102 "2016-11-04T10:22:18Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![scanfer](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/s/f04885/32.png) [@scanfer](https://community.openenergymonitor.org/u/scanfer)\ **Post date:** [4 November 2016 10:22 UTC](https://community.openenergymonitor.org/t/pv-diversion-strategy/2102/1 "2016-11-04T10:22:18Z")
I’m about to get a PV diverter set up. However we don’t use a lot of hot water and so I’m considering what other devices to divert to. What do others do? We have a gas boiler and 200 litre hot water tank. Economy 7 electricity which I use to charge my Nissan Leaf. However it’s rarely plugged in during the week. We use a dehumidifier for drying clothes (which is currently a manual partial “divert” in that I leave on if it’s going to be at all sunny) I’ll get an electric panel heater for anything left. So the rough “strategy” in terms of diversion priority is: 1. If available power \>2500W then charge the car (10 amps) 2. If humid and available power\>250W then switch dehumidifier on 3. Divert the rest to Immersion heater 4. When hot water heated then divert to a panel heater in the hall 1 and 2 will be implemented using EmonPi and OOK 13A plug switches (must admit I’ve not even looked at the coding for this yet) 3 and 4 handled by an Arduino+2 Triac output stages Does this make sense? Many thanks! ---
**Author:** ![calypso\_rae](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/calypso_rae/32/373_2.png) [@calypso\_rae](https://community.openenergymonitor.org/u/calypso_rae)\ **Post date:** [4 November 2016 10:43 UTC](https://community.openenergymonitor.org/t/pv-diversion-strategy/2102/2 "2016-11-04T10:43:53Z")
What will happen when the amount of surplus power suddently drops, such as when a kettle is turned on? You may be interested in this thread: [https://openenergymonitor.org/emon/node/5391](https://openenergymonitor.org/emon/node/5391) ---
**Author:** ![scanfer](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/s/f04885/32.png) [@scanfer](https://community.openenergymonitor.org/u/scanfer)\ **Post date:** [4 November 2016 11:28 UTC](https://community.openenergymonitor.org/t/pv-diversion-strategy/2102/3 "2016-11-04T11:28:54Z")
Thanks Robin, lots to think about, that’s a useful thread. I’ll get the immersion divert going and think about it over the winter, as I’m unlikely to have too much excess. ---
**Author:** ![scanfer](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/s/f04885/32.png) [@scanfer](https://community.openenergymonitor.org/u/scanfer)\ **Post date:** [30 January 2017 07:42 UTC](https://community.openenergymonitor.org/t/pv-diversion-strategy/2102/4 "2017-01-30T07:42:50Z")
So, last night I finally found the time to get my diverter finished and tested - and it works! In my shed at least. Very satisfying, and hats off to everyone involved. I used an emontx shield on an Arduino Uno, and a Crydom Solid State Relay. I did try the cheapest solution, a triac, but couldn’t get it to work.