GUMPY Posted October 28, 2021 Report Share Posted October 28, 2021 (edited) Not strictly boat equipment but it is solar so could count. How much output should one expect to see from a 4.38kW set of domestic solar panels driving a grid tie inverter over a 12month period. No batteries so that won't limit output. I know what my potential installer has quoted but it seems high to me. ETA panels are facing due south on a 35deg roof with no shade. @peterboat may have some idea😯 Edited October 28, 2021 by Loddon Link to comment Share on other sites More sharing options...
nicknorman Posted October 28, 2021 Report Share Posted October 28, 2021 14 minutes ago, Loddon said: Not strictly boat equipment but it is solar so could count. How much output should one expect to see from a 4.38kW set of domestic solar panels driving a grid tie inverter over a 12month period. No batteries so that won't limit output. I know what my potential installer has quoted but it seems high to me. @peterboat may have some idea😯 Presumably your latitude (elevation of the sun) and location (generally cloudy in the west, sunnier in the east etc) has a significant bearing? Link to comment Share on other sites More sharing options...
pig Posted October 28, 2021 Report Share Posted October 28, 2021 My domestic solar panels were installed in Feb 2012. The output over their lifetime to date is 35952 KWh, so thats about 3720 KWh per annum. (West Yorkshire, grid tied 3.6 KW inverter, 4.0 KW of panels) HTH Link to comment Share on other sites More sharing options...
GUMPY Posted October 28, 2021 Author Report Share Posted October 28, 2021 8 minutes ago, pig said: My domestic solar panels were installed in Feb 2012. The output over their lifetime to date is 35952 KWh, so thats about 3720 KWh per annum. (West Yorkshire, grid tied 3.6 KW inverter, 4.0 KW of panels) HTH Thats good to know, makes his figures of 4380 kWh seem more reasonable as we are a long way further south than you are. My calculations using https://re.jrc.ec.europa.eu/pvg_tools/en/ came out between the two figures. Thanks 42 minutes ago, nicknorman said: Presumably your latitude (elevation of the sun) and location (generally cloudy in the west, sunnier in the east etc) has a significant bearing? We are a long way south so that does help. Its a bit wet at the moment. Link to comment Share on other sites More sharing options...
Iain_S Posted October 28, 2021 Report Share Posted October 28, 2021 Our house system generates about 3400kWh per year. (Scotland, central belt, facing slightly east of south) Been installed for 10 years, and no sign of output dropping off Link to comment Share on other sites More sharing options...
peterboat Posted October 28, 2021 Report Share Posted October 28, 2021 2 hours ago, Loddon said: Not strictly boat equipment but it is solar so could count. How much output should one expect to see from a 4.38kW set of domestic solar panels driving a grid tie inverter over a 12month period. No batteries so that won't limit output. I know what my potential installer has quoted but it seems high to me. ETA panels are facing due south on a 35deg roof with no shade. @peterboat may have some idea😯 Mine are flat Julian, but I would have to interrogate both solar controllers and they have been turned off and reset 😟 I think the figures quoted are about right especially given your location. Link to comment Share on other sites More sharing options...
Split Pin Posted October 28, 2021 Report Share Posted October 28, 2021 I get about 4000 kWh per year from 4 kW instalation in the West Midlands and four of my panel face South East rather than directly south. Link to comment Share on other sites More sharing options...
GUMPY Posted October 28, 2021 Author Report Share Posted October 28, 2021 Thats all good news, all seems right. Good news is my total electricity use was 3148kWh over the last 12 months so the panels should cover that. Surprisingly the calculator https://re.jrc.ec.europa.eu/pvg_tools/en/ recons that even in December and January I will get about 140kWh per month That calculator also has the facity to do off grid calculations that could be used for a boat and allows you to input daily use etc to give a real indication of how you will fare with solar in the winter 1 Link to comment Share on other sites More sharing options...
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