I have been reading a lot about solar power and lithium iron phosphate batteries and decided to take the plunge into this adventure. Small info I'm from Europe (Germany).
What I have already done:
Now my idea was to get a Grid Tie Inverter with limiter like a Soyosource and call it a day.
This is going into my small garden hut that only has one phase and a base load of around ~100 Watts 24/7 (IT stuff is running there).
Anyway it's a small installation and now comes my dilemma. I got the info that I'm not allowed to install anything that is on-grid with the existing utility grid. That leaves me no other choice, but to either:
For option 1 I just can't find something that ticks all the boxes: Have MPPT and 24V Lithium support. I saw one from Growatt, but the 24V one only supports lead acid and I saw another one from PowMr that seems to be fine, but most of these are made for bigger installations and thus cost more. I saw people running those lead acid made ones with LIFEPO4 batteries, but that doesn't seem to be a good idea.
I would love to be as cheap as possible here. Would getting a normal pure sine wave inverter, hook that up to the battery and have an ATS switch (my IT stuff is behind an UPS so the switch taking more than x ms is fine) when the battery voltage gets too low be the easiest way or does anyone know a hybrid inverter that supports 24V lithium with an actual MPP tracker (and not PWM) that doesn't cost let's say more than 500€? (I don't need much power anything above 1KW is already enough)
I saw someone in this forum link an inverter with automatic transfer switch already built in, but that seems to be us stock only and I didn't find anything similar for Europe.
Any help on how to proceed is appreciated, I know this is a kinda strange requirement and small scale installation.
Have a good day.
What I have already done:
- built my own 24V battery out of eight 100Ah cells with BMS, top balanced, tested the capacity with a battery tester and got around ~2kWh (those cells sadly were not as advertised and didn't reach 100Ah, but for the price I paid I won't complain)
- bought a solar charger (Tracer3210AN) that would charge the battery with two JA Solar 345Wp Black Frame panels
Now my idea was to get a Grid Tie Inverter with limiter like a Soyosource and call it a day.
This is going into my small garden hut that only has one phase and a base load of around ~100 Watts 24/7 (IT stuff is running there).
Anyway it's a small installation and now comes my dilemma. I got the info that I'm not allowed to install anything that is on-grid with the existing utility grid. That leaves me no other choice, but to either:
- Get a hybrid inverter, that supports lithium 24V and has as little power as possible and sell my Tracer3210AN
- Get an standalone inverter that would be switched with an automatic transfer switch
For option 1 I just can't find something that ticks all the boxes: Have MPPT and 24V Lithium support. I saw one from Growatt, but the 24V one only supports lead acid and I saw another one from PowMr that seems to be fine, but most of these are made for bigger installations and thus cost more. I saw people running those lead acid made ones with LIFEPO4 batteries, but that doesn't seem to be a good idea.
I would love to be as cheap as possible here. Would getting a normal pure sine wave inverter, hook that up to the battery and have an ATS switch (my IT stuff is behind an UPS so the switch taking more than x ms is fine) when the battery voltage gets too low be the easiest way or does anyone know a hybrid inverter that supports 24V lithium with an actual MPP tracker (and not PWM) that doesn't cost let's say more than 500€? (I don't need much power anything above 1KW is already enough)
I saw someone in this forum link an inverter with automatic transfer switch already built in, but that seems to be us stock only and I didn't find anything similar for Europe.
Any help on how to proceed is appreciated, I know this is a kinda strange requirement and small scale installation.
Have a good day.