bob the builder 2 Posted March 11, 2023 Share Posted March 11, 2023 Hi All I am just about to press the button and order a 10kwh solar set up The cost of batteries and fancy inverter are making me think that a hot water diverter and simple inverter might be a better investment. I have been quoted for an ERS mini ( E.R.S Mini 3kW Solar Power Diverter | PowerFlow (powerflowenergy.com) which will connect to the immersion about 2 3rds up the tank As i am on a 3 phase and the tank immersion is limited to 2kw per phase i am ging forced to buy three of the diverters Would appreciate any advice Bob with Link to comment Share on other sites More sharing options...
SteamyTea Posted March 11, 2023 Share Posted March 11, 2023 54 minutes ago, bob the builder 2 said: 10kwh That will be 10 kWp, the peak is for peak. I take it the system is going to be 3 phase and that is why you have 3, 2 kW immersion heaters in your cylinder. I don't know too much about 3 phase systems, but depending on your meter, it may do net metering and you could divert just on one phase and let the other phases export, but the meter will cancel out the imports. May be simpler to buy 3 diverters. The one things to check is that your phases are balanced as well as they can be. That can be quite a challenge. Link to comment Share on other sites More sharing options...
dpmiller Posted March 11, 2023 Share Posted March 11, 2023 How many amps is an IEC plug rated for continuous? Link to comment Share on other sites More sharing options...
Nickfromwales Posted March 11, 2023 Share Posted March 11, 2023 1 hour ago, bob the builder 2 said: Hi All I am just about to press the button and order a 10kwh solar set up The cost of batteries and fancy inverter are making me think that a hot water diverter and simple inverter might be a better investment. I have been quoted for an ERS mini ( E.R.S Mini 3kW Solar Power Diverter | PowerFlow (powerflowenergy.com) which will connect to the immersion about 2 3rds up the tank As i am on a 3 phase and the tank immersion is limited to 2kw per phase i am ging forced to buy three of the diverters Would appreciate any advice Bob with There are 3ph diversion controllers available. I looked at one for my current 2 projects, where there is / is going to be 3ph on site with sizeable PV systems installed. Link to comment Share on other sites More sharing options...
bob the builder 2 Posted March 11, 2023 Author Share Posted March 11, 2023 Thanks All Any recommendation for those 3 phase diverters would be greatly appreciated thanks bob Link to comment Share on other sites More sharing options...
Nickfromwales Posted March 12, 2023 Share Posted March 12, 2023 I can’t remember who does the one I was discussing, but I can find out 👍. I discuss a LOT of stuff each week, and just the one brain lol, sorry 😵💫 Link to comment Share on other sites More sharing options...
joth Posted March 12, 2023 Share Posted March 12, 2023 11 hours ago, bob the builder 2 said: The cost of batteries and fancy inverter are making me think that a hot water diverter and simple inverter might be a better investment. Lots of unknowns impact this decision. Do you have a heat pump? If so the battery is a better investment as that allows you to efficiently run the heatpump from PV and heat up the DHW tank using 2-3 times less energy than the immersion. If not an ASHP, what is the other source of heating hot water? Will you be doing MCS install and going for paid export? How large is the DHW tank and how much hot water do you anticipate using per day (how many occupant's in the house) Do you anticipate using a lot of electricity per day on other appliances? Link to comment Share on other sites More sharing options...
JOE187 Posted March 12, 2023 Share Posted March 12, 2023 Bob Here is a 3 phase diverter https://mk2pvrouter.co.uk/3-phase-version.html I have had single phase running from Robin for 8+ years, no problems. Joe. Link to comment Share on other sites More sharing options...
bob the builder 2 Posted March 12, 2023 Author Share Posted March 12, 2023 HI Thanks all for the feedback - below is my set up and the options on solar diverter and battery. ASHP 500l main tank with 6kw immersion 200l buffer tank on 3 phase option 1 - Total cost installed £14k - x3 ers mini diverters - 10kwh solar - optimisers on each panel - NON HYBRID INVERTER option 2 x 4 4.8 kwh batteries - PYLON US5000 4.8KWH LI-ION SOLAR BATTERY - 10kwh solar - optimisers on each panel - HYBRID INVERTER Would appreciate any views as not sure which way to go - probably will want an MCS install Thanks bob Link to comment Share on other sites More sharing options...
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