Battery Storage Wiring Gauge Question
I'm looking to get an Seplos Mason 280/LF304 battery bundle (15kwh) and I want to place it in a little outhouse attached to the side of the main house - mainly for fire prevention reasons but it's also damned heavy! The Solis inverter is in the loft...
What is the maximum length of cable I can run between the two please? I'll obviously get the correct gauge but can't get my head around what that gauge needs to be.
Posted by: @puffWhat is the maximum length of cable I can run between the two please?
As long as you like, you have to watch overall voltage drop on the DC side less than the AC. (Assume you are running in DC). I am running PV cables 40m in DC no issue, in AC it would have been quite costly and I may have had voltage drop issues.
Posted by: @puffI'm looking to get an Seplos Mason 280/LF304 battery bundle (15kwh) and I want to place it in a little outhouse attached to the side of the main house - mainly for fire prevention reasons but it's also damned heavy! The Solis inverter is in the loft...
What is the maximum length of cable I can run between the two please? I'll obviously get the correct gauge but can't get my head around what that gauge needs to be.
As far as the gauge or thickness of the cable is concerned, this will depend upon the maximum quantity of power to be moved and the voltage.
If you wish to supply 3kW of power at 240 Volts AC, then the maximum current would be 3000/240 = 12.5 Amps.
To move the same 3kW at 50 Volts DC would require a current flow of 3000/50 = 60 Amps.
If you look at the current carrying capacity of different sized cable you should find the one that would meet the task.
Posted by: @derek-mAs far as the gauge or thickness of the cable is concerned, this will depend upon the maximum quantity of power to be moved and the voltage.
If you wish to supply 3kW of power at 240 Volts AC, then the maximum current would be 3000/240 = 12.5 Amps.
To move the same 3kW at 50 Volts DC would require a current flow of 3000/50 = 60 Amps.
If you look at the current carrying capacity of different sized cable you should find the one that would meet the task.
It's a Solis 3.6kw hybrid inverter, so has a nominal 5kw max output at 48/50 vDC, which from the above would imply 100 Amps/thereabouts.
I need about 8m of length so a 1AWG or 0 AWG to be on the safe side?
25mm² cable would give 2.56% (1.23 volts) drop based on 48V, 100A and 8m.
35mm² 1.87% (0.896 volts) drop
Doesn't look like you need (50mm²)
Posted by: @puff1AWG or 0 AWG to be on the safe side?
Check your manual for max volt drop.
- 22 Forums
- 2,073 Topics
- 45.5 K Posts
- 25 Online
- 3,354 Members
Join Us!
Trusted Installers
Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.
✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available
Latest Posts
-
RE: Solar Power Output – Let’s Compare Generation Figures
510kWh of solar PV from my 4kW Hyundai panels and SMA S...
By JulianC , 8 hours ago
-
RE: Is my Samsung heat pump working too well?
Thats in itself is interesting. I have a Vaillant heat...
By JamesPa , 10 hours ago
-
RE: Jokes and fun posts about heat pumps and renewables
@transparent Not a swell season then ☹️
By Toodles , 12 hours ago
-
RE: 5 Star Service from Havenwise
Oh good! I was wondering when/if you might pick them ...
By Transparent , 1 day ago
-
RE: Air Changes per Hour - ACH and the MCS requirement
update - my old installer insisted on a heat loss of 11...
By MatWin , 1 day ago
-
I agree it's not very helpful. Generally, the max heat ...
By Old_Scientist , 2 days ago
-
RE: Commencing on an ASHP Installation Process
I think therein lies the problem. Ratio of quotes to i...
By JamesPa , 2 days ago
-
RE: Why Your MCS-Certified Installer Might Not Be As Competent As You Think
Hive and most other smart thermostats don't play well w...
By JamesPa , 2 days ago
-
RE: Enabling WiFi: Samsung ASHP on Smart Things App
Thanks for the input. I've been running various experim...
By Grahamh-uk , 2 days ago
-
RE: Radiators downstairs are cooler at the bottom after ASHP install
@melonbuffet Hi, this sounds great is you are getting 5...
By ASHP-BOBBA , 3 days ago
-
RE: Ripped Off: How UK Homeowners Are Paying Gas Prices for Wind Energy
I believe there's another reason that network upgrades ...
By Transparent , 3 days ago
-
RE: What’s the modern take on advised types of insulation?
@jeff I am sorry @jeff if I have misunderstood what you...
By Toodles , 3 days ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
@editor Cobbler’s Mantra that!
By Toodles , 4 days ago
-
RE: Renewables & Heat Pumps in the News
Australia Blue, the first wind farm in Western Victoria...
By Morgan , 4 days ago
-
RE: Flow rate discrepancy between ASHP and manifold
That's useful thanks, I hadn't seen that table before. ...
By AshRolls , 5 days ago
-
In principle I agree, @johnmo, but with provisos. The...
By Majordennisbloodnok , 5 days ago
-
RE: Heat pump installation and BUS Grant timings
@jamespa Thats how I understood it too. 🙂
By ASHP-BOBBA , 5 days ago
-
RE: Antifreeze top up for my heat pump - is this a rip off?
@sallyl That sounds about right if they are re-filling ...
By Brendon Uys , 6 days ago
-
I wouldn't be so sure about that. Heat pump designers ...
By JamesPa , 6 days ago