Second quarter 2018 performance

Q2 2018 summary: 18% colder, 2% less usage and 4% more sun as compared to Q2 2017.

This is part of our quarterly home performance reporting. All data is posted at netplusdesign.com

Overall, here’s how this quarter compared to 2017.

Q2 Comparison 2017-2018

2017	Usage	Solar PV	Net usage or (surplus)	Avg. daily usage	HDD
Total	1,421	2,258	(837)	15.6	847
Apr	531	758	(227)	17.7	421
May	514	692	(178)	16.6	315
Jun	375	807	(432)	12.5	110

All values in kWh (except HDD which is base 65°F).

2018	Usage	Solar PV	Net usage or (surplus)	Avg. daily usage	HDD
Total	1,396	2,349	(953)	15.3	997
Apr	627	660	(32)	20.9	724
May	470	850	(381)	15.2	162
Jun	300	839	(540)	10.0	111

Quite a bit cooler this quarter. The last day we used heat was May 1. That’s about 2 or 3 weeks later than usual.

Here’s our breakdown on energy use and cost for the last six winter seasons.

Winter season	Heat kWh	Est. Cost
2012-13	957	$144
2013-14	1,804	$271
2014-15	2,200	$330
2015-16	1,305	$196
2016-17	1,804	$271
2017-18	2,103	$315

Est. cost based on $0.15 kWh.

We would have spent about $1,527 (if we paid for electricity) for the last six winters.

We haven’t netted out energy-wise yet. We’re still 312 kWh short. In 2016 we netted out on May 31 after 8am. In 2015 we were 637 kWh short. In 2014 we netted out around mid-July. In years prior we were net positive by May or June.

Our overall water usage is down 6% from Q2 2017. It started out dry this quarter but the rain picked up. We only had to water the garden a few times. Out hot water usage was down 22%.

You can see heat maps and detailed charts of temperature and electrical usage at netplusdesign.com. View hourly, daily and monthly values for solar, usage, net usage, temperatures and HDD.