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Hi all, I'm confused about grid connection breakers with inverters (in hybrid or off grid) and the AC input/ grid connection. Taking a 7.5kw solax inverter for example, the max AC input is 40a. Therefore, a 50a breaker in the consumer unit would be suitable, but my confusion is mostly around...

Hi all! I installed an 11kw Off grid system using an MPP solar 11kw Max inverter and 24x JA Solar 405w panels (in 2x strings of 12), it was a nice starting point and works well, only I would now like to build upon what I've learned and start to improve the quality a little. I'd like to replace...

Hi all, I wired up 2x strings to a DC disconnect made by Dihool (Chinese)... https://www.amazon.co.uk/Isolator-Disconnect-pre-wired-connectors-Waterproof/dp/B0B8YRBHHZ/ However, I'm aware that the cheap brands of DC disconnect increase the risk of fire. Even if the fire risk is low I'd like to...

Hi all, I think I know the answer to this but I wanted to make absolutely sure: I have a basic question about the max kw inverters can handle. I'm aware inverters have a max Voc that strings cannot exceed, but what about kw? Is it as simple as... an 8kw inverter can only handle a max PV array...

Hi all, I've noticed an audible 'buzz' sound on my off grid inverter when I enable the PV panels. If I disable them via a cut off the inverter is quieter, but when enabling them I can hear a buzz of electricity that's quite noticeable. Is this common when enabling the PV feed? thanks

Hi all I have 2x Pylontech US5000 batteries connected to an MPP solar 11kw inverter. After an f51 over current fault I've been running some checks. One thing I've noticed is that the batteries seem to drain a lot even without significant load. I've turned off my panels whilst testing and here's...

I recently switched on my 11kw mpp solar off grid solution which has 26x 405w panels and 2x us5000 batteries. The system works great, but when running from battery power and a heavy load us being pulled (e.g. 8kw), the system switches to utility. So it seems 10kw batteries has too much...

Hi all, I have 2x US5000 batteries with an 11kw mpp solar inver, from what I can see these are the same as the victron inverters. When the batteries are low I receive an 04 low battery alarm. The inverter is set to SBU. setting 12 is at 46V, if I increase this to 48V will it help? The battery...

Hi all, just wondering what form of breaker/protection people use on the AC output cables that run from their inverters to the CU/board? I'm thinking... the AC out of inverters is usually rated up to 50 amps, but if for example, in your board you had two rcbo's rated at 32a, then running both...

Hi all, I have two strings of 13 panels in series rated at 37.23v = 484v per string. I'm looking into surge protection such as the following... https://www.amazon.co.uk/dp/B0BQF5TBBQ?ref=ppx_pop_mob_ap_share But there appears to be no information regarding the rating. Is the 500v version...

Hi all, quick beginners question about isolation. If you turn off the solar array at the DC isolator, where does the power go? So imagine you have a string generating 500VDC, when the isolator is off, the panels are still generating this power but it has nowhere to go to, so where does it go? Is...

Hi all, I'm looking for advice regarding the maximum load for solar inverters. I assume most of us connect a new consumer unit/board to the inverter, rather than an existing CU. Usually the supply into a UK home is 80-100amps, but in the consumer unit, the MCB/RCBO total is often higher than...

Hi all, I'm looking into off grid all in one inverters with batteries but I'm wondering how these power all circuits in the CU from the mains feed. Specifically how does the AC in work? Do you run the main house supply into the inverter AC in, and then the AC out to the consumer unit? So...

Hi all - I have 2x Pylontech US5000 batteries in parallel, each with their own set of cables (as the cables are rated at 120a). It seems to be a very common mistake that people use the supplied cable to connect 1x positive and 1x negative to the inverter with batteries in parallel, but with 2x...

Hi all, I'm using pylontech us5000 batteries but there seems to be an issue with their connectors in that they're only rated to 120A as they use radlock/amphenol connectors. Therefore if you add a second battery in parallel then these connectors are under specced, alongside their 4awg cable...

Hi all, I'll be mounting 26x 405w panels in a couple of weeks time. I'll be using 2x strings of 13x panels. I have a SW facing roof which they can all fit on, but there is also a south facing roof that could house 10x panels. My question is... If I put 10x panels on the south roof, then ran a...

Hi all, I'm installing a 11kw off grid system and have 2x us5000 pylontech batteries. The positive from the battery to the inveter should have a breaker, but as the batteries are 48V, ideally this would be a 250a 60v DC breaker. These don't seem to exist. Breakers up to 48V are readily...