Received: from PCH.mit.edu (18.7.21.50) by mail.efplus.com (192.168.0.8) with Microsoft SMTP Server (TLS) id 8.3.485.1; Tue, 15 Dec 2020 07:58:25 -0800 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 0BFFmMl9031082; Tue, 15 Dec 2020 10:49:00 -0500 Received: from outgoing-exchange-1.mit.edu (OUTGOING-EXCHANGE-1.MIT.EDU [18.9.28.15]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 0BFFmK3F031074 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 15 Dec 2020 10:48:21 -0500 Received: from w92exedge3.exchange.mit.edu (W92EXEDGE3.EXCHANGE.MIT.EDU [18.7.73.15]) by outgoing-exchange-1.mit.edu (8.14.7/8.12.4) with ESMTP id 0BFFldo2030929 for ; Tue, 15 Dec 2020 10:48:20 -0500 Received: from w92expo8.exchange.mit.edu (18.7.74.62) by w92exedge3.exchange.mit.edu (18.7.73.15) with Microsoft SMTP Server (TLS) id 15.0.1293.2; Tue, 15 Dec 2020 10:47:32 -0500 Received: from oc11exhyb8.exchange.mit.edu (18.9.1.113) by w92expo8.exchange.mit.edu (18.7.74.62) with Microsoft SMTP Server (TLS) id 15.0.1365.1; Tue, 15 Dec 2020 10:47:42 -0500 Received: from NAM10-BN7-obe.outbound.protection.outlook.com (104.47.70.107) by oc11exhyb8.exchange.mit.edu (18.9.1.113) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Tue, 15 Dec 2020 10:47:42 -0500 Received: from CO2PR04CA0163.namprd04.prod.outlook.com (2603:10b6:104:4::17) by MW4PR01MB6212.prod.exchangelabs.com (2603:10b6:303:71::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3654.12; Tue, 15 Dec 2020 15:47:42 +0000 Received: from CO1NAM11FT022.eop-nam11.prod.protection.outlook.com (2603:10b6:104:4:cafe::e3) by CO2PR04CA0163.outlook.office365.com (2603:10b6:104:4::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3654.12 via Frontend Transport; Tue, 15 Dec 2020 15:47:42 +0000 Received: from mx4.ncf.ca (172.83.172.18) by CO1NAM11FT022.mail.protection.outlook.com (10.13.175.199) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3654.20 via Frontend Transport; Tue, 15 Dec 2020 15:47:41 +0000 Received: from localhost (localhost [127.0.0.1]) by mx4.ncf.ca (Postfix) with ESMTP id D0C0E14461 for ; Tue, 15 Dec 2020 10:47:40 -0500 (EST) Received: from mx4.ncf.ca ([127.0.0.1]) by localhost (mx4.ncf.ca [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id X_KRMtNndWba for ; Tue, 15 Dec 2020 10:47:40 -0500 (EST) Received: from mail.ncf.ca (mail.ncf.ca [172.83.172.45]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx4.ncf.ca (Postfix) with ESMTPS id 4E3D7144E0 for ; Tue, 15 Dec 2020 10:47:40 -0500 (EST) Received: from [192.168.1.65] (unknown [172.83.170.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: fh489) by mail.ncf.ca (Postfix) with ESMTPSA id E3F89223C4 for ; Tue, 15 Dec 2020 10:47:39 -0500 (EST) From: Gordon Williams To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Tue, 15 Dec 2020 07:47:39 -0800 Subject: Re: [OT] Solar p;anels Thread-Topic: [OT] Solar p;anels Thread-Index: AdbS+x+q5wUxVimtRl6U01sJi6zuLw== Message-ID: <950eecd8-07c3-139d-af18-c9cfd7cf4be8@ncf.ca> References: List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US Content-Language: en-GB X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of ncf.ca designates 172.83.172.18 as permitted sender) receiver=protection.outlook.com; client-ip=172.83.172.18; helo=mx4.ncf.ca; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ncf.ca; s=mail; t=1608047260; bh=jko5nMrrLUJ2sZNFeQBFNYin94JpE/X/frY4xbLG/cE=; h=Subject:To:References:From:Date:In-Reply-To:From; b=Qu9v3fLKo9m2ouyOEWCArBa8cHdgi1fcmpHRWWdWmFvuk/eXFTay4ZtdH0H68dXiu WjcrlqECYPWGYqPXsKLHwPV6yJlY2HsNdkZ7htW9TFZt8KwBrAjNMODPSj6g2pfU8a mSZ5Faw7/0rbMybhwHkDgTWslVUgi3pLcDuEFIxY= authentication-results: spf=pass (sender IP is 172.83.172.18) smtp.mailfrom=ncf.ca; mit.edu; dkim=test (signature was verified) header.d=ncf.ca;mit.edu; dmarc=pass action=none header.from=ncf.ca; user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-virus-scanned: Ubuntu amavisd-new at x-topics: [OT] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Hmm - I think the labels may be wrong on the graph. Why would it not be latitude PLUS 23.5 deg rather than minus 15 deg as=20 you suggest for max power in winter? You want them MORE angled up to get the sun as it is closer to the=20 horizon in winter, not more parallel to the ground. Wouldn't the panel perform best when it is perpendicular to the suns=20 rays at the winter solstice? Gord Williams On 2020-12-15 9:31 a.m., Forrest Christian (List Account) wrote: > Note that this means latitude*minus* 15, or pointing at where the sun is = on > solar noon in about a week from now. If you engineer for that, then the > rest of the year you're golden. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .