Greetings, i'm wondering if i can build a solar system without battery's. say i have a 3000 watts of solar panels and a water heater and a 550 watt air-conditioner and a 850 watt air-conditioner. is it not possible to buy a converter that changes the voltage to 110 ac and use the following logic, if solar watts is less than 550 the use the water heater. if solar watts is greater than 550 but less that 850 watts then turn off the water heater and turn on the 550 air-conditioner. if solar watts is greater than 850 but less than 1400 then turn off the 550 watt a/c and turn on the 850 watt a/c. if solar watts is greater than 1400 then turn on the 550 a/c and the 850 a/c. can't something like this be done ?? i understand i'll need some big caps to handle the load of starting the a/c compressors.
newbie question, solar system without batterys
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agreed, no anti-islanding, for safety purposes. so is there any other electrical parts i'm going to need? i'm thinking 10 300 watt panels in 3 strings, one panel i want to keep separate to play with. so 900 watts max for each string. 3 1000 watt grid tie inverters. they don't have to be master slave type inverters because grid tie inverters get their cadence from the grid, but should be of the type mppt ?? is mppt important if your not going to be charging battery's ?? or do mppt type inverters get you more 110 volt watts than pwm ?? a lot of questions. sorry, i feel like i'm almost there.Comment
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agreed, no anti-islanding, for safety purposes. so is there any other electrical parts i'm going to need? i'm thinking 10 300 watt panels in 3 strings, one panel i want to keep separate to play with. so 900 watts max for each string. 3 1000 watt grid tie inverters. they don't have to be master slave type inverters because grid tie inverters get their cadence from the grid, but should be of the type mppt ?? is mppt important if your not going to be charging battery's ?? or do mppt type inverters get you more 110 volt watts than pwm ?? a lot of questions. sorry, i feel like i'm almost there.Comment
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i'm thinking 10 300 watt panels in 3 strings, one panel i want to keep separate to play with. so 900 watts max for each string. 3 1000 watt grid tie inverters. they don't have to be master slave type inverters because grid tie inverters get their cadence from the grid, but should be of the type mppt ?? is mppt important if your not going to be charging battery's ?? or do mppt type inverters get you more 110 volt watts than pwm ?? a lot of questions. sorry, i feel like i'm almost there.
3KW inverter, output 240 VAC. Bruce Roe
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good one sun eagle. i need to be aware of what you can buy and whats legal. back to the drawing board. ul listing is required.Comment
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ugh, priced more than i want to pay. i don't think now is the right time to buy (for me). panels are predicted to continue falling and as the volume of UL inverters increases perhaps their price will continue to fall. especially micro inverters. maybe i'll look again in 2018 or 19. thanks everyone, bye.Comment
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Unfortunately while the requirement of a UL listing is necessary you will end up spending more for that equipment then those cheap off shore type but IMO it is worth the extra expense knowing you are using a quality product.Comment
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