Don't buy Photovoltaic Panels. 10 things you must check before you order.
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what you need to know to order or build a good installation, what panels to buy Bonus!!! another simple controller for a photovoltaic installation Colleague Marcin and his controller: I see that there is often a problem with switching off the inverter due to too high voltage, I have this problem myself by email, so I will gladly share my solution, it is slightly different from the method presented by you because it gives me the ability to switch on practically every device in the house, both single-phase and 3-phase. I control everything using home automation Home assistant (free) has a connected inverter and reads the voltage on the inverter every 5 seconds (the voltage is slightly higher than at the entrance to the house). in automation I have if the voltage is higher than 253V for longer than 1 minute (or higher than 260V immediately turns on the heater) on any phase turn on the 3-F heater for 30 seconds (I have a three-phase contactor but it is possible to control each phase separately). automation gives the possibility of controlling it in any way (ultimately switching on battery charging). Costs: PLN 203 (additionally I have temperature protection like you showed with the panels for PLN 2-3 so as not to boil the water in the tank) computer if we don't have PLN 129 (energy-saving) https://allegro.pl/oferta/terminal-hp... 3 f contactor PLN 45 https://allegro.pl/oferta/stycznik-mo... sonoff to control the contactor via wifi PLN 29 https://allegro.pl/oferta/sonoff-basi... An interesting solution because it allows you to use the second tariff at maximum with a heat pump or air conditioning that I can turn on remotely and with a schedule and in the case when, for example, the 2nd tariff is fluid like in Spain? the computer itself will download cheap hours from the operator's website and turn on the heating when needed. I really like what you do and thanks to you I will try to make an off-grid this year, I am waiting for the construction of a shelter and some free time, the plan is to use the damaged 20 pieces of 260W panels on two walls vertically
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