That looks like an excellent setup you have, i'm sure you will grow the system as you find more batterys 😀 Hmm can bus like on a car, but a different data type i suppose. I'm sure you will have your evil way with it 😀 I was thinking about the position of the temp sensors in that battery pack, two down the center line of the pack. maybe?. A wind turbine may be your next possibility.

@razenby

2 жыл бұрын

Thanks. We will see how successful it it is. including the Growatt SPA3000 has cost about £1800 so far. I expect by the time I bought a cabinet for the batteries it will cost around £2K, It wont take long to pay me back at ~£3 per day. The shrapnel damaged donor car was a year old with 7,00 kilometers on the clock so these premium traction batteries should still in a strong condition. I'll review the BMS system and perhaps even read the instructions. My guess is that one sensor for ambient in the cabinet and the other will be fixed to the pack by silicone to monitor the actual cell cell temp. I would love a turbine but we are surrounded by trees. I fear that it would be too gusty. My next project after this is a Combined Heat and Power system (CHP) which generates 3.6 kVA electricity and hot water from the coolling system and exhaust gas heat exchanger. It will run on the natural gas main. Very expensive RVs /exhibition trailers generators are widely being replaced by Lion batteries and inverters. I just picked up a Honda twin cylinder water cooled generator for a £200. The hours counter says it has been run for a total of 16 hours. I will use it in the winter to charge the batteries and heat the radiators. It should put out 3.6kVA of power and about 14kW water heating. That is the thery anyway!!

Make sure your fire insurance covers you for spontaneous combustion.

@razenby

4 ай бұрын

Don't worry It is OK it is deployed in a brick outhouse building away from the house. Most house fires are caused by Tumble dryers

Nice system, how long do you think it’ll take to recoup the monies spent on a system like this? Solar in the uk seems to take many years, 10yrs etc to get the outlay back. Is that still the case?

@razenby

2 жыл бұрын

Thanks. I fitted by 4.6 kW solar panels 10 years ago and they have more than paid for themselves by in-feed tariff. This system cost about £1800 so, at current electricity prices that will be paid back in between 2 to 3 years..It will save about £3 to £4 UK pounds per day in electricity costs.

Buy an electric water heater to use as a dump load for all that excess solar and get free hot water.

@razenby

2 жыл бұрын

Only if you don't have mains gas. Gas is 7 Pence/kWH and electricity is 31 pence. It much better financial sense to use the electricity for general power. I have solar hot water tubes.that heat the water between May and the end of September.

@kitecattestecke2303

2 жыл бұрын

@@razenby how is gas so cheap when Russia doesn't supply any to Europe? Just wait for it to skyrocket even in england

@daikiryoku

2 жыл бұрын

@@razenby Going renewables isn't about saving money.

@razenby

2 жыл бұрын

@@kitecattestecke2303 Gas will allays be cheaper per KWh than electricity.

How many panels are you using with this set up? Assuming they are about 350w

@razenby

Жыл бұрын

have 19 panels - 13 of them are rated 300W (10 years old) connected to a 2.7Kw Fronious inverter and the 6 are rated at 240W (6 years old) connected to a growatt inverter, In this country the system hardly never turn out the rated power. They aren't efficient when hot so they work much better in cold clear conditions with powerful sun Late spring usually. . I have installed several systems for friends lately as I became an authorised installer early this year. The peak maximum I have seen post inverter on my system is 3.5kw so expect about 70% of what is says on the tin. The inverter loses are about 8% of the power in conversion. I have measured the efficiency of Fronious and Growatt inverters i.e. DC power input kWH VS AC power output kWH.