Domestic Solar PV Quotes 2024 - No PM requests - See Mod note post #1

Thanks for that. So is the battery being filled with solar or night rate (I get EV night rate 8c 2am-6am) got any value at all? Installer 3 was basically steadfast on without battery it's pointless. I guess if solar is strong during day I pay nothing, at night if the battery is filled with free or 8c electricity to try basically get to a 24hr scenario where the electricity I'm using costs at most, 8c?

Is the 2 inverters in the attic with 2 different types of panels ever an issue as he described? Like am I better paying more and getting everything the same? I can't really tell why I would get rid of the existing 5 if they work. So that's my biggest conundrum.

charge at 8c on an EV tariff, instead of paying 32c (minimum) during daytime, for say 4kWh per day at 80% depth of discharge. (.32-.8) x 4 €0.96 savings per day. 2k / 0.96 is about 5.7 years payback. Battery warranty probably 10 years, but could well last longer than that at <80% capacity. Tariff rates may vary. Also using daytime electricity at higher cost than a non-smart tariff will erode your savings. Solar charging will enhance them, but I’d consider that a bonus myself.

Depending on household usage I think 5kWh might be too small tbh, because a family will tip over the 5kWh into the more expensive day rates on EV tariffs. 10kWh at €4k could be better value, I suspect.

Don't forget to factor in charge/discharge/inverter losses. You'll pay for 5 units to get 4 or less usable back at the plug.

Hi All

Thanks for your feedback. I've accepted quote 1 (4.15kWp; €4,500 after grant; Cost per kWp: €1,082; Solar Panels: Jolywood NIWA Pro Series -JW-HD108N-415 (6nr panels south facing and 4nr east facing - I can't squeeze in any more); Inverter: Afore 5kW Hybrid HNS5000HS) with the system due to be installed before the end of the month. I had initially decided that I would park the idea of getting a battery until a later date, but I'm now reconsidering. The company I've gone with are quoting me €2350 to add on a 5kWh Sunwoda Energy MonaWall 5 battery. What's people's thoughts on: a) the cost?; b) this particular battery?; and c) the current general thinking around batteries?. I'm willing to dive into the whole grid shifting space with a battery assuming that it makes sense from a pay back perspective, and also assuming it will be reasonably easy for me to toggle with the settings of the battery - note I have no experience of working with batteries, inverters etc!

All feedback is welcome

Many thanks!

Quote 1 for the value and RoI (wholesale unit rates only 8c, so how long before utilities cut retail, which means extra years to get your money back). Battery might never pay for itself if rates drop

It depends, are all panels on the same orientation or split into 2 strings with different orientations? Do you intend adding panels in the future?

if you're so inclined you could potentially add another two panels to the array. but it depends on what make/model of inverter they quoted and of course if you've got the space?

i have a 5kW Solis Hybrid inverter. it can handle up to 8000W so looking at the panels voc and wattage i knew i could go with a maximum of 19 panels (410w) which sized my array at 7.79kW, just inside the "recommended" maximum size array for the inverter.

if its possible then i'd highly recommend requesting the extra two panels. worst case you'll just start clipping a bit earlier in the year than it would normally do.

10 x 430w panels.

5kw Huawei inverter.

Eddi inverter

€8000 before grant.

Not sure if its good.

Hello, I just got a quote for solar PV on standard pitched roof and would love any opinions on it:

18 panels: Topco TP415PMB7-44SCF

One battery: Inverter - Solis Hybrid inverter with 1 no. 5kWh Battery.
EH1 Energy Storage 5kW Hybrid 5G Inverter Fox ESS Battery

Shunt isolator

Mounting system - roof hooks

Price includes extra fuse board as no room in existing

Location: dublin

Price: €11,150 minus €2100 grant = €9,050

All thoughts welcome!

Thanks v much for the reply!